MX2007014479A - A process to enrich a carboxylic acid composition - Google Patents

Abstract

A process is provided for producing an enriched carboxylic acid compositions produced by contacting composition comprising a carboxylic acid with an enrichment feed in an enrichment zone to form an enriched carboxylic acid composition. This invention also relates to a process and the resulting compositions for removing catalyst from a carboxylic acid composition to produce a post catalyst removal composition.

Description

A PROCESS TO ENRICH AN I CARBOXYLIC ACID COMPOSITION FIELD OF THE INVENTION This invention relates to a process and resulting enriched carboxylic acid compositions produced by contacting a carboxylic acid composition with an enrichment feed in an enrichment zone to form an enriched carboxylic acid composition. This invention also relates to an Iprocess and the resulting compositions for removing catalyst from a cooled carboxylic acid composition. ! BACKGROUND OF THE INVENTION: Terephthalic acid is commercially produced mediated by the oxidation of paraxylene in the presence of at least one catalyst such as, for example, Co, n and Br catalyst and a solvent, typically acetic acid. The terephthalic acid is typically made in a manner to remove the impurities formed as a result of the oxidation of paraxylene.; Terephthalic acid (TPA) is an intermediate in the production of condensation polymers and copolymers, especially polyesters and copolyesters for plastics, fibers, films, coatings, containers and other articles. Of particular commercial importance is poly (ethylene terephthalate), referred to as PET, a polyester of TPA and! ethylene glycol (EG), as well as related copolyesters. Commercial processes for the manufacture of TPA are often based on the oxidation of p-xylene catalyzed by multivalent transition metal, generally with a bromide promoter in an acetic acid solvent. Due to the limited solubility of TPA in acetic acid under practical oxidation conditions, a crystalline agglomerate suspension containing mainly TPA is usually formed in the oxidation reactor. Typically, the oxidative suspending of TPA is removed from the reactor, and the TPA solids are separated from the oxidizing mother liquor using conventional solid-liquid separation techniques. The oxidant mother liquor stream containing the majority of the catalyst and promoter used in the process is recycled to the oxidation reactor. In addition to the catalyst and the promoter, the oxidizer mother liquor stream also contains dissolved TPA and many byproducts, impurities, and other compounds.These other compounds, oxidation byproducts and impurities arise partially from compounds present in minor amounts in the stream of p-xylene feed Other oxidizing compounds and byproducts arise due to incomplete oxidation of p-xylene resulting in partially oxidized products.

Still other compounds and oxidation byproducts result from the opposite side reactions formed as a result of the oxidation of p-xylene to terephthalic acid. Patents disclosing the production of terephthalic acid such as U.S. Patent Nos. 4,158,738 and 3,995,271 are hereby incorporated by reference in their entirety to the extent that they do not contradict the claims herein. Many of the compounds in the oxidant mother liquor stream that are recycled are relatively inert to further oxidation, but are not inert to the addition reaction that includes decomposition and conversion to other compounds. Such compounds include, for example, isophthalic acid (IPA), benzoic acid and italic acid. Compounds in the oxidizing mother liquor stream, which can be subjected to further oxidation are also present, such as, for example in the case of the oxidation of p-xylene (also known as 1,4-dimethylbenzene), compounds such -carboxybenzaldehyde, p-toluic acid, toluajldehyde and terephthaldehyde Compounds that are relatively inert to oxidation and are not otherwise removed from the process tend to accumulate in the liquor stream! oxidizing mother in the recycling. Conventionally, crude terephthalic acid (CTA) is purified either by conversion to a dimethyl ester or by dissolution in water with subsequent hydrogenation over standard hydrogenation catalysts.

More recently, secondary oxidant treatments in place of hydrogenation have been used to produce polymer-grade TPA. It is desirable to minimize the concealment of impurities in the mother liquor and thus facilitate the subsequent purification of TPA. In some cases, it is not possible to produce a TPA of polymer grade, purified unless some means to remove impurities from the oxidant mother liquor pump is used. One technique for the removal of impurities commonly used in the chemical processing industry is to reuse or "purge" some portion of the mother liquor stream! as a recycle stream. Typically, the purge corrector is simply disposed of or, if economically justified, subjected to various treatments to remove unwanted impurities while recovering valuable components. An example of this purging process is U.S. Patent No. 4,939,297 incorporated in the foregoing by reference in its entirety to the extent that it does not confirm the claims in the present. The purification of CTA to produce purified terephthalic acid (PTA) increases the manufacturing cost of PTA. It is desirable to maximize the concentration of by-products, impurities, and other compounds in the terephthalic acid to the extent that the terephthalic acid remains useful, especially in making poly (ethylene) polymer. terefbalato) (PET) and articles thereof, such as film, containers and fiber. An example of utility is the improved performance in a carboxylic acid process, particularly a process of terephthalic acid. Another utility of this invention is flexibility to control the destination of specific compounds in the process. For example, a portion of specific compounds can be retained on the product in a catalyst removal zone, and / or enriched in the product in the enrichment zones such that they exit with the product stream, or are allowed to exit the process . Still another utility is that the process allows the option of placing compounds on the product stream that are not in the TPA process. Another utility is the option of adding a comonomer, to the product stream of TPA, for example, IPA, it can be added. BRIEF DESCRIPTION OF THE INVENTION In a first embodiment of this invention, a process for producing an enriched composition is provided. The process comprises subjecting at least one stream selected from the group consisting of a cooled carboxylic acid composition, a crystallized suspex composition, a suspension composition, and a crude carboxylic acid composition; and an enrichment feed to an enrichment zone to form the enriched composition; wherein the enrichment feed comprises at least one compound selected from the group consisting of terephthalic acid, isophthalic acid, italic acid, isomers of benzene tricarboxylic acid, benzoic acid, isomers of hydroxybenzoic acid, isomers of hydroxymethylbenzoic acid, isomers of dicarboxybiphenyl , isomers of, dicarboxystilbene, isomers of tricarboxybiphenyl, isomers of tricarboxybenzophenone, isomers of dicarboxybenzophenone, isomers of dicarboxybenzyl, isomers of form-acetyl-hydro-lobenzoic acid, isomers of acet-hydroxymethylbenzoic acid, isomers of a-bromo-toluic acid, acid bromo-benzoic acid, bromo-acetic acid, tolualdehyde isomers, benzyl alcohol isomers, methyl benzyl alcohol isomers and phthaldehyde isomers; wherein at least one of the compounds is enriched. In another embodiment of this invention, a process for producing an enriched composition is provided. The process comprising subjecting a cooled carboxylic acid composition, or a chromate-containing suspension ratio, or a suspension composition or a carboxylic acid composition; and an enrichment feed to an enrichment zone to form the enriched composition; wherein the enrichment feed comprises at least one compound selected from the group consisting of terephthalic acid, isophthalic acid, italic acid, isomers of benzene tricarboxylic acid, benzoic acid, isomers of hydrokibenzoic acid, isomers of hydroxymethylbenzoic acid, isomers of dicarboxybiphenyl, isomers of dicarboxystilbene, isomers of tricarboxybiphenyl, isomers of titicarboxybenzophenone, isomers of dicarboxybenzophenone, isomers of dicarboxybenzyl, isomers of form-acetyl-hydrobenzoic acid, isomers of acet-hydroxymethylbenzoic acid, isomers of a-bromo-toluic acid, bromo-benzoic acid, acid! bromo-acetic, isomers of tolualdehyde, isomers of benzyl alcohol, isomers of methyl benzyl alcohol and isomers of phthaldehyde; wherein at least one of the compounds is enriched; and wherein the cooled carboxylic acid composition, or the crystallized suspension composition, or the suspension composition, or the The crude carboxylic acid composition comprises terephthalic acid. In another embodiment of this invention, a process for producing an enriched composition is provided. The process comprises subjecting a cooled carboxylic acid composition, or a crystallized suspension composition, or a suspension composition, or a crude carboxylic acid composition; and an enrichment feed to an enrichment zone to form the enriched composition; wherein the enrichment feed comprises at least one compound selected from the group consisting of isophthalic acid, italic acid, isomers of benzene tricarboxylic acid, benzoic acid, isomers of hydroxybenzoic acid, isomers of hydroxymethylbenzoic acid, isomers of dicarboxybiphenyl, isomers of dicarboxystilbene, isomers of tricarboxybiphenyl, isomers of tricarboxybenzophenone, isomers of dicarboxybenzophenone, isomers of dicarpoxybenzyl, isomers of form-acetyl-hydroxybenzoic acid, isomers of acet-hydroxymethylbenzoic acid, isomers of a-bromo-toluic acid, bromo-benzoic acid, bromo-acetic acid, tolualdehyde isomers, benzyl alcohol isomers, methyl benzyl alcohol isomers and phthaldehyde isomers; wherein at least one of the compounds is enriched; and wherein the cooled carboxylic acid composition, or the crystallized suspension composition, or the suspension composition or the crude carboxylic acid composition comprises isophthalic acid. In another embodiment of this invention, a process for producing an enriched composition is provided. The process comprises subjecting a cooled carboxylic acid composition, or a crystallized suspension composition i, or a suspension composition, or a crude carboxylic acid composition; and a feeding enrichment to an enrichment zone to form the enriched composition; wherein the nutrition feed comprises at least one compound selected from the group consisting of isophthalic acid, trimellitic acid, 4,4' -dicarboxibufenyl, phthalic, 4-hydroxymethylbezoic acid, 4-hydroxymethylbenzoic acid and benzoic acid; wherein at least one of the compounds is enriched; and wherein the cooled carboxylic acid composition, or the crystallized suspension composition, or the suspension composition, or the crude carboxylic acid composition comprises terephthalic acid. I! These modalities and other modalities will become more evident to others with ordinary skill in the art after reading this description. BRIEF DESCRIPTION OF THE DRAWINGS i Figures 1 A & B illustrate. an embodiment of the invention wherein a dry carbodlylic acid composition 280 is produced. FIG. 2 illustrates various embodiments of the invention where multiple liquid displacement zones 40 can be used.! Figure 3 illustrates an embodiment of the invention where a crystallized suspension composition 160 can be; produce through multiple different processes.; Figure 4 illustrates one embodiment of the invention wherein the crude carboxylic acid composition or a suspension composition can be produced by multiple different processes. Figure 5 illustrates an embodiment of the invention i wherein a post-catalyst removal composition 200 is produced from a carboxylic acid composition 214 in a catalyst removal zone 180. I Figure 6 illustrates one embodiment of the invention wherein a catalyst zone 180 as an enrichment zone 210 is used to produce an enriched composition 240 of a cooled carboxylic acid composition 170. i Figure 7 illustrates an embodiment of the invention where an enriched composition 240 is produced from of a post-catalyst removal composition 200 in an enrichment zone 210.: Figure 8 illustrates one embodiment of the invention that 'shows multiple enrichment feed points 220.' Figure 9 illustrates various embodiments of the invention. wherein a carboxylic acid composition 214 and / or a crystallized suspension composition 160 are enriched. 'Figure 10 illustrates various modalities of the I invention wherein a carboxylic acid composition 214 Enriched in an extended enrichment zone 213. FIG. 11 illustrates various embodiments of the invention wherein the enrichment zone 210 and the catalyst removal zone 180 can be combined in at least one catalyst removal / enrichment zone combined 181 or at least one device that achieves both functions. Figures 12, 13, 14 and 15 illustrate one embodiment of the invention showing multiple enrichment feeds 220 in a given process. Figure 16 illustrates an embodiment of the invention in which an enriched composition 240 is directly sent to an esterification reaction zone 610. Figure 17 illustrates an embodiment of the invention wherein a wet cake composition with water 246 is directly sent. In an esterification reactor zone 610. Figure 18 illustrates an embodiment of the invention wherein an aromatic feedstock 10 is used to produce a catalyst post-removal composition 200. i Figure 19 illustrates one embodiment of the invention in wherein an aromatic feed material 10 is used to produce an enriched composition 240. I Figures 20 A &B illustrate one embodiment of the invention wherein the catalyst removal zone 180 is optional, and enrichment zone 10 is required. DETAILED DESCRIPTION OF THE INVENTION . The present invention can be more easily understood by reference to the following detailed description of the preferred embodiments of the invention and the examples included herein and to the Figures and their previous and following description. Before the present compounds, compositions, articles, devices, and / or methods are disclosed and described it will be understood that the invention is not limited to specific synthetic methods, specific processes, or to particular apparatus, since such, for course they can vary. It is also to be understood that the terminology used herein is for the purpose of describing particular modalities only and is not intended to be limiting. In this specification and in the claims, which follow, the reference will be made to a number of terms that will be defined to have the following meanings. As used in the specification and in the I appended claims, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. Thus, for example, the reference to the catalyst zone includes an o. more areas and catalyst removal.

The ranges can be expressed herein as "approximately" a particular value and / or "approximately" another particular value. When such an interval is expressed, another modality includes from a particular value I and / or the other particular value. Similarly, when the values are expressed as approximations, by using the "approximately" antecedent, it will be understood that the particular value forms another modality. It will be further understood that the endpoints of each of the intervals are significant both in relation to another endpoint :, and indeently of the other endpoint. "Optional" or "optionally" means that the subsequently described event or circumstance may or may not occur, and that the description includes instances where the event or circumstance occurs and in cases where it does not. For example, the phrase "optionally heated" means that the The material can or can not be heated, and that phrase includes both heated and unheated processes. It should not be objected that the numerical ranges and parameters that set out the broad scope of the invention are approximations, the numerical values set forth in the specific examples are reported as precisely as possible. Any value! However, it inherently contains certain errors that necessarily result from the standard deviation found in their respective test measurements.

I I! The ranges set forth in this description and the claims are intended to include the entire interval i specifically and not precisely the final point (s). For example, an established interval that is 0 to 10 | proposes to disclose all numbers between 0 and 10 such as], for example, 1, 2, 3, 4, etc., all fractional numbers between 0 and 10, for example 1.5, 2.3, 4.57, 6.113, etc., and endpoints 0 and 10. Also, a range associated with chemical substituent groups such as, for example, "Ci to C5 hydrocarbons", is specifically proposed to include and disclose Ci to C5 hydrocarbons as well as C2, C3 hydrocarbons. , and C4. In one embodiment of the invention, a composition of p < The removal of catalyst 200 is optionally contacted with a feed and enrichment 220 in an enrichment zone 210. A susion composition 70 or crystallized susion composition 160 or cooled carboxylic acid composition 170 or crude carboxylic acid composition 30 can be contacted. do in any conventional process known in the art to produce a carboxylic acid composition. The susing composition 70 or the crystallized susion composition 160 or the; cooled carboxylic acid composition 170 or the crude carboxylic acid composition are then subsequently used to produce an acid composition dry carboxylic 280 or an enriched composition 240 or a dewatered cake composition 260. For example, a method for making a post-catalyst removal composition 200 s provides in Figures 1A & B. Step (a) in Figure 1A comprises oxidizing an aromatic feedstock 10 in a primary oxidation zone 20 to form a crude carbohydric acid composition 30. The aromatic feedstock 10 comprises at least one oxidizable compound, at least one solvent and at least one catalyst. One embodiment of the present invention relates to the partial oxidation of the liquid phase of an oxidizable compound. Such oxidation is preferably carried out in the liquid phase of a multiphase reaction medium.

I in a reactor or stirred reactors. Suitable stirred reactors include, for example, reactors stirred by I bubbles (for example, bubble column reactors) and mechanically agitated reactors (for example, reactors of I continuous stirring). The liquid phase oxidation is preferably carried out in a column reactor of mainly by the upward movement of gas bubbles a. Through the reaction medium as used herein, the term "agitation" will denote the work dissipated in the reaction medium causing the fluid flow and / or the mixture. As used in this, the terms "majority", "mainly", and "predominantly" will mean more than 50%. [The oxidizable compound present in the aromatic feed material 10 preferably comprises at least one hydrocarbyl group. More preferably, the oxidizable compound is an aromatic compound. Still more preferably, the oxidizable compound is an aromatic compound with at least one attached hydrocarbyl group or at least one substituted hydrocarbyl group or at least one attached heteroatom or at least one function of bound carboxylic acid (-COH). Even more preferably, the oxidizable computables is an aromatic compound with at least one attached hydrocarbyl group or at least one substituted hydrocarbyl group attached to each linked group comprising from 1 to 5 carbon atoms. still more preferably, the oxidizable compound is an aromatic compound having exactly two groups bonded to each bound group which comprises exactly one carbon atom and which consists of methyl groups and / or substituted methyl groups and / or at most one group of acid carboxylic Still more preferably, the oxidizable compound is para-xylene, meta-xylene, para-tolualdehyde, meta-tolualdehyde, para-toluic acid, meta-toluic acid, and / or acetaldehyde. Much more preferably, the oxidizable compound is para-xylene. A "hydrocarbyl group", as defined in the present ten, is at least one carbon atom that is bonded I only to the hydrogen atoms or to the other atoms of carbojio. A "substituted hydrocarbyl group", as defined in | present, is at least one carbon atom bonded to at least one hetero atom and to at least one hydrogen atom. "Heteroatoms" as defined herein, are all atoms different from the carbon and hydrogen atoms. "aromatic compounds" as defined in the foregoing, comprises an aromatic ring, preferably having at least 6 carbon atoms, even more preferably having only carbon atoms as a part! From the ring. Suitable examples of such aromatic rings include, but are not limited to, benzene, biphenyl, terphenyl, naphthalene and other fused aromatic rings based on carbon. Suitable examples of the oxidizable compound include aliphatic hydrocarbons (for example, alkanes, branched alkanes, cyclic alkanes, aliphatic alkanes, branched alkanes and cyclic alkenes); aliphatic aldehydes (for example, acetaldehyde, propionaldehyde, isobutyraldehyde, and all isomers of dimethylbiphenyls, all isomers of ethyl methylphenyls and all isomers of diethylbiphenyls, styrene and with one or more hydrocarbyl group attached, fluorene and with one or more attached hydrocarbyl groups, anthracene and with one or more hydrocarbyl groups bound and diphenylethane and with one or more attached hydrocarbyl groups); various benzene rings, naphthalene rings, biphenyls, terphenyls and other aromatic groups with one or more hydrocarbyl group attached and / or one or more bound heteroatoms, which may be connected to other atoms or groups of atoms (eg, phenol, all isomers of methylphenols, all isomers of dimethylphenols, all isomers of naphthols, benzyl methyl and ether, all isomers of bromophenols, bromobenzene, all I the isomers of bromotoluenes which include alpha-bromotoluene, dibromobenzene, cobalt naphthenate and all isomers of bromopiphenyls); various benzene rings, naphthalene rings, biphenyls, terphenyls, and other aromatic groups with one or more attached hydrocarbyl groups and / or one or more bound heteroatoms and / or one or more substituted hydrocarbyl groups attached (eg, benzaldehyde, all the isomers of bromobenzaldehydes, all isomers of brominated toluajldehydes including all isomers of alpha-bromotolualdehydes, all isomers of hydroxybenzaldehydes, all isomers of bromo-hydrolxybenzaldehydes, all isomers of benzene dicarooxaldehydes, all isomers of benzene trica rboxaldehydes, para-tolualdehyde, meta-tolualdehyde, ortho-tolualdehyde, all isomers of toluene dicarooxaldehydes, all isomers of toluene tricalrboxaldehydes, all isomers of dimethylbenzene dicarooxaldehydes, all isomers of dimethylbenzene tricalrboxaldehydes, all isomers of dimethylbenzene tetrabarboxaldehydes, all isomers of trimethylbenzene tricalrboxaldehydes, all isomers of ethyl tolualdehydes, all isomers of trimethylbenzene dicarboxaldehydes, tetramethylbenzene dicarboxaldehyde, hydroxymethyl1-benzene, all isomers of hydroxymethyl-toluenes, all isomers of hydroxymethyl-bromotoluenes , all isomers of hydro-imethyl-tolualdehydes, all isomers of hydroxymethyl-bromotolualdehyde, benzyl hydroperoxide, benzoyl hydroxide, all isomers of tolyl methyl-hydroperoxides and all isomers of methylphenol methyl-hydro-oxides ); various benzene rings, naphtha rings, biphenyls, terphenyls and other aromatic groups with one or more selected groups attached, selected from the group meaning hydrocarbyl group and / or heteroatoms joined and / or substituted hydrocarbyl groups and / or groups of acid | carboxylic acid and / or peroxy acid groups (for example benzoic acid, paratoluic acid, metatoluic acid, ortho-toluic acid, ortho-lithic acid, all the isomers of ethylbenzoic, all isomers of propylbenzoic acid all isomers of bultilbenzoic acid; all isomers of pentylbenzoic acid, all isomers of methyl-monohydric acid, all isomers of ethyl-methylbenzoic acid, all isomers of trimethyl-carbonic acids, all isomers of tetraethyl-benzoic acid, pentamethyl-benzoic acid, all isomers of diethylbenzoic acid, all isomers of benzene dicarboxylic acid, all the acid isomers of benzene tricalcarboxylic acid, all isomers of methylbenzene dicarboxylic acids, all isomers of dimethylbenzene dicarboxylic acids, all isomers of methylbenzene tricarboxylic acids, all isomers of bromobenzoic acid, all isomers of dibromobenzoic acids, all isomers of bromotolytic acids, including alpha-bromo-toluic acids, tolylacetic acid, all the isomers of hydroxybenzoic acid isomers, all the isomers of methyl-hydroxymethyl-benzoic acid, all the isomers of hydroxytolic acids, all the hydroxymethyltolics, all isomers of hydroxymethylbenzenedicarboxylic acids, all isomers of hydroxybromobenzoic acids, all isomers of hydroxybromotoluic acids, all isomers of hydroxymethylbromobenzoic acids, all isomers of carboxybenzaldehydes, all isomers of .. I dicarboxybenzaldehydes, perbenzoic acids, all isomers of hydroperoxymethyl-benzoic acid, all isomers of hydroperoxymethyl-hydroxybenzoic acids, all isomers of hydroperoxycarbonyl-benzoic, all isomers of hydroperoxycarbonyl-toluenes, all isomers of methyl biphenyl carboxylic acids , all isomers of dimethylphenylcarboxylic acid, all isomers of methyl-isenyl-dicarboxylic acid, all isomers of biphenyl-tricane-carboxylic acid, all isomers of stilbene with one or more selected groups attached, all isomers of fluorenone with one or more selected groups bound, all isomers of naphthalene with one or more selected groups attached, benzyl, all isomers of benzyl with one or more selected groups attached, benzophenone, all isomers of benzophenone with one or more selected selected groups, anthraquinone, all isomers of anthraquinone with one or more selected groups united, all isomers of diphenyletan with one or more selected groups attached, benzojcoumarin, and all isomers of benzocoumarin with one or more selected groups attached). ! It should be understood that the oxidizable compound present in the liquid phase feed may comprise a combination of two or more different oxidizable chemicals These two or more different chemical materials can be fed co-mixed into the feed material aromatic 10 or can be fed separately into multiple feed streams. For example, an aromatic feedstock comprising para-xylene, meta-xylene, para-tolualdehyde, para-toluic acid and acetaldehyde can be fed into the reactor via a single inlet or multiple separate inlets. The solvent present in the aromatic feed material 10 preferably comprises an acid component and a water component. In one embodiment of the invention, the solvent is preferably present in the aromatic feedstock 10 in a concentration in the range of about 60 to about 98 per cent by weight, more preferably in the range of about 80 to about 96 percent by weight. weight, and much more preferably in the range of about 85 to 94 percent by weight. The acid component of the solvent is preferably an organic low molecular weight monocarboxylic acid having 1-6 carbon atoms, more preferably 2 carbon atoms. Most preferably, the acid component of the solvent is acetic acid. Preferably, the acid component constitutes by [at least about 75 weight percent of the I solvent, more preferably at least about 80] percent by weight of the solvent and much more preferably 85 to 98 percent by weight of the solvent, with the rest that is water. Suitable solvents include, but are not limited to, aliphatic monocarboxylic acids, preferably containing from 2 to 6 carbon atoms, or benzoic acid or mixtures thereof and mixtures of these compounds with water. '! The catalyst system present in the aromatic feedstock 10 is preferably a homogeneous liquid phase catalyst system capable of promoting oxidation (including partial oxidation) of the oxidizable compound. More preferably, the catalyst system comprises at least one multivalent transition metal. Still more preferably, the multijivalent transition metal comprises cobalt. Even more preferably, the catalyst system comprises cobalt and bromine. Much more preferably, the catalyst system comprises cobalt, I bromine) and manganese. When the cobalt is present in the catalyst system, it is preferred for the amount of cobalt present in the aromatic feedstock 10 to be such that the cobalt entrainment in the liquid phase of the reaction medium in the primary oxidation zone 20 is maintain in the range of from about 300 to about 6,000 parts per million by weight (ppmw), more preferably in the range of from about 700 to about 4,200 ppmw, I and much more preferably in the range of from 1,200 to 3,000; ppmw. When the bromine is present in the catalyst system it is preferred that the amount of bromine present in the aromatic feedstock be such that the concentration of bromine in the liquid phase of the reaction medium is maintained in the range of about 300 to about 5,000 ppmw, more preferably in the range of about 600 to about 4,000 ppmw and most preferably in the range of 900 to 3,000 ppmw. When manganese is present in the catalyst system, it is preferred for the amount of manganese present in the aromatic feed material 10 to be such that the concentration of manganese in the liquid phase of the reaction medium is maintained in the range of about 20 to about 1,000 ppmw, more preferably in the range of about 40 to about 500 ppmw, most preferably in the range of 50 to 200 ppmw. The concentrations of cobalt, bromine, and / or manga that in the liquid phase of the reaction medium, provided. In the above, they are expressed on a time-averaged and averaged basis in volume. How is it used In the present, the term "averaged in time" will denote a I predicted at least 10 measurements taken over a period of 100 seconds of continuous time. How is it used in the present, the term "averaged in volume" will denote a result of at least 10 measurements taken in uniform three-dimensional spaces for a certain volume. The weight ratio of cobalt to bromine (Co: Br) in the catalyst system introduced into the primary oxidation zone 20 is preferably in the range of about 0.25: 1 to about 4: 1, more preferably in the range of about 0.5: 1 to about 3: 1, and much more preferably in the range of 0.75: 1 to 2: 1. The weight ratio of cobalt to manganese (Co: Mn) in the catalyst system introduced into the primary oxidation zone 20 is preferably in the range of from about 0.3: 1 to about 40: 1, more preferably in the range of about 5. 1 to about 30: 1 and much more preferably in the range of 10: 1 to 25: 1. The aromatic feedstock 10 introduced into the primary oxidation zone 20 may include small amounts of compounds such as, for example, meta-xylene, ortho-xylene, toluene, ethylbenzene, 4- i carbojxibenzaldehyde (4-CBA), acid benzoic acid, para-toluic acid, para-toluicoaldehyde, alpha-bromo para-toluic acid, isophthalic acid, italic acid, trimellitic acid, polychromatics, and / or suspended particulates. i 1 Stage (b) optionally comprises removing at minus a portion of the oxidation byproducts of a crude carboxylic acid composition in a liquid displacement zone 40 to form a suspension composition 70. A crude carboxylic acid composition 30 i comprises at least one carboxylic acid, so minus one catalyst, at least one solvent, and at least one oxidation by-product at least a portion of which is removed via the SO line. The oxidation by-products typically comprise at least one or more of the following classes of compounds and their isomers: carboxylic acids, aldehydes, hydroxyaldehydes, carboxyaldehydes, ketones, alcohols and any of the hydrocarbons. In case i of the oxidation of p-xylene, the oxidation by-products typically comprise at least one of the following compounds: 4-carboxybenzaldehyde, p-toluic acid, p-tolualdehyde, isophthalic acid, italic acid, benzoic acid, acid trimellitic, 4, '-dicarboxybiphenyl, 2,6- 1 and 2,7- dicarboxyfluorenone, 2,6-dicarboxyanthraquinone, 4,4' -dicarboxibenzophenone,, 4'-dicarboxybiphenyl and a-brcjmo-p-toluic acid. The solvent typically comprises acetic acid, but can be any solvent that has been previously mentioned. The crude carboxylic acid composition 30 is produced by oxidizing in a primary oxidation zone 20 a aromatic feed material 10. In one embodiment, the aromatic feed material 10 comprises paraxylene. The primary oxidation zone 20 comprises at least one oxidation reactor. The crude carboxylic acid composition | 30 comprises at least one carboxylic acid. In one embodiment of the invention, the oxidation reactor can be operated at temperatures between about 110 ° C to about 200 ° C; another range is between about 140 ° C and about 170 ° C. Typically, the oxidizable compound in the aromatic feedstock 10 is paraxylene, and the carboxylic acid produced is terephthalic acid. In one embodiment of the invention, the primary oxidation zone 20 comprises a bubble column. I The carboxylic acids include aromatic carboxylic acids produced by the controlled oxidation path of an organic substrate or any carboxylic acid produced by the oxidation of previously mentioned oxidizable compounds. Such aromatic carboxylic acids include compounds with at least one acid group! carboxylic linked to a carbon atom that is part of an aromatic ring, preferably having at least 6 carbon atoms, even more preferably having only carbon atoms. Suitable examples of such aromatic rings include, but are not limited to, benzene, i I that at least 25% by weight of the liquid is In another embodiment of the invention, a portion that at least 35% by weight of the liquid is removed. In another embodiment of the invention, a portion that at least 45% by weight of the liquid is removed. In another embodiment of the invention, a portion that at least 55% by weight of the liquid is removed In another embodiment of the invention, a portion that at least 65% by weight of the liquid is removed In another embodiment of the invention, a portion that is at least 75% by weight The weight of the liquid is In another embodiment of the invention a portion that at least 85% by weight of the liquid is In another embodiment of the invention, a portion can mean any part up to and including the total amount of the liquid is removed. ! Removal of a portion of the liquid to produce a suspension composition in conduit 70 can be achieved by any means known in the art.

Typically, the liquid displacement zone 40 comprises a solid-liquid separator that is selected from the group consisting of a decanter centrifuge, disk stack centrifuge, vacuum band filter, rotary vacuum filter, rotary pressure filter, perforated cejsta centrifuge and the like. The acid composition The crude carbohydrate in the duct 30 is fed into the liquid displacement zone 40 comprising at least one solid-liquid separator. In one embodiment of the invention, the solid-liquid separator can be operated at temperatures between about 5 ° C to about 200 ° C. In yet another range, the solid-liquid separator can be operated from about 90 ° C to about 170 ° C. In yet another range, the solid-liquid separator can be operated from about 140 ° C to about 170 ° C. The solid-liquid separator can be operated at pressures up to 200 psig. In still another range the solid-liquid separator can be operated at pressures between about 30 i psig to about 200 psig. The solid-liquid separator in the liquid displacement zone 40 can be operated in continuous or batch mode, although it will be appreciated that for commercial processes, continuous mode is preferred. : A portion of the oxidation by-products are released from the liquid displacement zone 40 in a mother liquor and removed via line 60. In one embodiment of the invention, the additional solvent is fed to the liquid displacement zone 40 via the line 50 to resuspend the crude carboxylic acid composition and form a suspension composition 70. The mother liquor! 60 is removed from the liquid displacement zone 40 via the line 60 line and comprises a solvent, typically acetic acid, catalyst, and at least one oxidation byproduct (s). The mother liquor in line 60 can be either sent to a process for separating the impurities from the oxidation solvent via the lines not shown or recycled to the catalyst system via d, the lines not shown. A technique for removing impurities from mother liquor commonly used in the chemical processing industry is to remove or "purge" some portion of the recycle stream. Typically, the purge stream is simply disposed of, or economically justified, subjected to various treatments to remove the unwanted impurities while recovering the valuable components. Examples of impurities removal processes include U.S. Patent Nos. 4,939,297 and U.S. Patent 4,356,319, are incorporated in the foregoing by reference to the extent that they do not contradict the claims made herein. In embodiments of the present invention a process is disclosed that can allow the controlled division of at least one compound, by-product or impurities selected from the mother liquor filtration, the wash feed, and the wet cake with terephthalic acid while achieving the recovery of the oxidation catalyst and the oxidation reaction medium or solvent.

Also in embodiments of this invention, the purge process can be significantly reduced or eliminated by enrichment of a post-catalyst removal composition with selected compounds. The enrichment process results in these compounds being carried out with the enriched composition 240 or the dry carboxylic acid composition 280, thereby greatly reducing or eliminating a purge process. The enrichment can be presided over by a catalyst removal process. It should be noted that the liquid displacement zone 40 is optional and can also be located at multiple locations in the process as shown in Figure 2 by dashed lines. In another embodiment of the invention, there is more than one liquid displacement zone (s) 40 such as, for example, between the oxidation zone.

The first oxidation zone 20 and the oxidation zone of stages 80, and another liquid displacement zone i can be located either after the oxidation zone of stages 80 or after the zone! of crystallization 120. It could see three liquid shift zones 40 as shown in Figure 2 or any combination as shown in Figure 2. Step (c) comprises optionally oxidizing the suspension slide 70 or a carboxylic acid composition raw 30 in a stage oxidation zone 80 to form a step oxidation composition 110. In one embodiment of the invention, the suspension composition 70 or a crude carboxylic acid composition 30 is refried via the line 70 to an oxidation zone.

I i of stages 80 and can be heated to between about i 140 ° C to about 280 ° C. Another range is between about 160 ° C to about 240 ° C, another range is between about 170 ° C to about 200 ° C and is further oxidized with air fed by line 106 to produce a step 110 oxidation composition. Other (range is from about 180 ° C to about 280 ° C) Step oxidation zone 80 comprises at least one stage oxidation reactor vessel The suspension composition 70 is fed to the feed zone of stages 80. The term "of steps" means that the oxidation occurs in both the primary oxidation zone 20 discussed previously as well as in the oxidation zone of steps 80. For example, the oxidation zone of stage 80 may comprise reactor of oxidation reactor of serial stages. When the carboxylic acid is terephthalic acid, the stage oxidation zone 80 comprises at least one oxidation reaction which can be heated to between about 140 ° C to about 280 ° C or between about 160 ° C to about 240, or between about 170 ° C to about 200 ° C, or between about 160 ° C to about 210 ° C and optionally oxidized with air or a source of molecular oxygen fed by line 106 to produce a step oxidation composition 110. In one embodiment of the invention, the oxidation in the oxidation zone of steps 80 is at a higher temperature than the oxidation in the primary oxidation zone 20 to increase the removal of impurities. The oxidation zone of steps 80, as well as streams 30 and 70, can be heated directly with solvent vapor, or indirectly by any means known in the art. The purification in the oxidation zone of steps 80 takes place by a mechanism that involves recrystallization or crystal growth and oxidation of impurities. Additional air or molecular oxygen can be fed via the IOS line to the oxidation zone of steps 80 in an amount necessary to oxidize at least a portion of the partially oxidized products, such! 4-carboxybenzaldehyde (4-CBA) and p-toluic acid in the crude carboxylic acid composition 30 or the suspension composition 70 to the corresponding carboxylic acid.

Generjally, at least 70% by weight of the 4-CBA is converted to terephthalic acid in the oxidation zone of steps 80. Preferably, at least 80% by weight of the 4-CBA is converts to terephthalic acid in the oxidation zone of steps 80. Significant concentrations of 4-carboxybenzaldehyde and p-toluic acid in the terephthalic acid product are particularly detrimental to the polymerization processes since they can act as chain terminators during the reaction of condensation between terephthalic acid and ethylene glycol in the production of polyethylene terephthalate (PET). ! The impurities in the crude carboxylic acid composition 30 or the suspension composition 70 go into the solution since the terephthalic acid particles are dissolved and recrystallized in the oxidation zone of steps 80. The discharge gas from the zone of Oxidation of steps 80 is removed and can be fed to a recovery system where the solvent is removed from the discharge gas comprising volatile organic compounds (VOCs). The VOCs I which include methyl bromide can be treated, for example, by incineration in a catalytic oxidation unit. The discharge gas can also be processed before! that the oxidation composition of steps 110 of the step oxidation zone 80 is removed via the line 110. Step (d) comprises optionally crystallizing the suspension composition 70 or the acid composition I crude carbolicil 30 or the oxidation composition of stages 110 n a crystallization zone 120 to form an ISO crystallized suspension composition. Generally, the crystallization zone 120 comprises at least one crystallizer. The vapor product of the crystallization zone 120 can be condensed in at least one condenser and returned to the recrystallization zone 120. Optionally, the liquid of the condenser or vapor product of the crystallization zone 120 can be recycled, or You can remove or send to a recovery device I energy. In addition, the crystallizer discharge gas is removed and can be routed to a recovery system where the solvent is removed and the chloralizer discharge gas comprising VOCs can be treated, for example, by incineration in a Catalytic oxidation unit. The oxidation composition of steps 110 of the oxidation zone of steps 80 is removed via line 110 is fed into a crystallization zone 120 which comprises at least one crystallizer where it is cooled to a temperature between about 110 ° C at about 190 ° C to form a crystallized suspension composition 160, preferably at a temperature between about 140 ° C to about 180 ° C, and much more preferably about 150 ° C I at approximately 170 ° C. The crystallized suspension composition I SO of crystallization zone 120 is removed via line 160. Typically, the crystallized suspension composition 160 is then fed directly into a vessel and cooled to form a cooled carboxylic acid composition 170. When the carboxylic acid is terephthalic acid, the carboxylic acid composition 170 is cooled in a vessel at typically a temperature of about 160 ° C or less, preferably at about 100 ° C or less, before being introduced into a process to recover terephthalic acid as a dry powder or a wet cake. Step (e) optionally comprises cooling the crystallized slurry composition 160 or the oxidation composition of steps 110 or the slurry composition 70 or the crude carboxylic acid composition 30 in a quench zone 165 to form a carbohydrate acid composition. cooled xyl 170 The crystallized suspension composition 160 or the step suspension composition 110 or the suspension composition 70 or the crude carboxylic acid composition 30 are fed to a cooling zone 165 and cooled to an I temperature ranging from about 5 ° C. at about 160 ° C, or about 5 ° C to about 90 ° C, or about 5 ° C to about 195 ° C or about 20 ° C to about 160 ° C to form the cooled carboxylic acid composition 170. In another embodiment of the invention, the crystallized slurry composition 160 or the step oxidation composition 110 or the slurry composition 70 or the crude carboxylic acid composition 30 is fed to a cooling zone 165 a temperature ranging from about 20 ° C to about 90 ° C is cooled to form the cooled carboxylic acid composition 170. In another embodiment of the invention, the crystallized slurry composition 160 or the oxidation composition of steps 110 or the composition of suspension 70 or the crude carboxylic acid composition 30 is fed to a cooling zone 165; and it is cooled to a temperature ranging from about 20 ° C to about 120 ° C to form the cooled carboxylic acid composition 170. In another i modality of the invention, the suspension composition I Chrominated 160 or the step oxidation composition 110 i or the suspension composition 70 or the crude carboxylic acid composition 30 is fed to a cooling zone i i 165; and is cooled to a temperature ranging from about 10 ° C to about 90 ° C to form the cooled carboxylic acid composition 170. In another embodiment of the invention, the crystallized slurry composition 160 or the step oxidation or the suspension composition 70 or the crude carboxylic acid composition 30 is fed to a cooling zone 165 j and cooled to a temperature ranging from about 20 ° C to about 60 ° C to form the cooled carboxylic acid composition 170. In another embodiment of the invention, the crystallized suspension composition 160 or the oxidation composition of steps 110 or the suspension composition 70 or the carboxylic acid composition 30 is fed to a cooling zone 165 and cooled to a varying temperature. from about 20 ° C to about 40 ° C to form the cooled carboxylic acid composition 170. In another embodiment of the invention, a portion of the solvent is optionally removed from the crystallized slurry composition 160 or the step oxidation composition. 110 or suspension composition 70 or crude carboxylic acid composition 30 via conduit 163 to produce ucir the cooled carboxylic acid composition 170. In one embodiment of the invention, a portion can mean any part up to and including everything. A portion can mean at least 5% by weight of the solvent that is removed. In another embodiment of the invention, a portion can mean at least 10% by weight of the solvent that is removed. In another embodiment of the invention, a formulation can mean at least 25% by weight of the solvent that is removed. In another embodiment of the invention as a portion can cause at least 25% by weight of the solvent that is removed. In another embodiment of the invention, a portion can mean at least 50% by weight of the solvent that is removed. In another embodiment of the invention, a portion can mean at least 75% by weight of the solvent that is removed. In another embodiment of the invention, a portion can mean at least 85% by weight of the solvent that is removed. In another embodiment of the invention, a portion can mean at least 90% by weight of the solvent that is removed from the crystallized suspension composition 160 or the composition of oxidized steps 110 or the suspension composition 70 or the crude carboxylic acid composition. 30. Removal of the solvent can be achieved by any means known in the art. For example, the solvent can be removed by evaporation by instantaneous evaporation and removing the solvent under vacuum. ! In another embodiment of the invention, both the cooling and the solvent removal are used. Steps (a) to (b) and steps (a) to (e) are to illustrate embodiments of the invention in which a cooled carboxylic acid composition 170 is produced. It should also be noted that the displacement zone of the liquid 40, the oxidation zone of steps 80, and the zone of crystallization 120 all were optimal in this modality of injury. For example, other processes that produce a cooled carboxylic acid composition 170, or a crystallized slurry composition 160, or a step oxidizing composition 110, or a slurry composition 70, or a raw carboxylic acid composition 30 They can use it. Such processes are described in U.S. Patents 5,877,346; 4,158,738; 5,840,965; 5,877,346; US 5,527,957; and US 5,175,355, all of which are incorporated herein by reference in their entirety to the extent that they do not contradict the claims made herein. Therefore, as shown in Figure 3, Any process known in the art capable of producing a crystallized suspension composition 160 can be used. In addition, as shown in Figure 4, any process known in the art capable of producing a crude carboxylic acid composition 30 or a suspension composition 70 can be used. Generally, as shown in Figure 5, any carboxylic acid composition 214 can be used in step (f) with the proviso that the carboxylic acid composition or cooled carboxylic acid composition 170 comprises at least one acid carbojxilico, at least one solvent and at least one catalyzed. The carboxylic acid comprises any acidpreviously disclosed carboxylic acid or any carbokilic acid capable of being produced by the oxidation of oxidizable compounds previously disclosed. The solvent is typically acetic acid, but can be any solvent previously disclosed. The catalyst is any catalyst that has been previously disclosed. Figure 6 shows a process using a cooled carbohydric acid composition 170 in step (f). Step (f) comprises contacting a cooled carboxylic acid composition 170, or a crystallized suspension composition 160, or a step oxidation composition 110 or a suspension composition 70, a crude carboxylic acid composition with a washing feed 175 and optionally an enrichment feed 220 in a catalyst removal zone 180 to form a catalyst rich liquor 185, a wash liquor stream 62, an optional depleted enrichment stream 230 and a catalyst removal composition 200. The cooled carboxylic acid composition 170, or a suspension composition crystallized 160, or a suspension composition 110 or a suspension composition 70, or! a crude carboxylic acid composition 30 is contacted with a washing feed 175 in the catalyst re-dodging zone 180. In one embodiment of the invention of hydroxymethylbenzoic acid, isomers of hydroxybenzoic acid, benzoic acid and toluic acid isomers. In another embodiment of the invention, the post composition Removal of catalyst 200 comprises a carboxylic acid, solvent and optionally one or more compounds selected from the group consisting of isophthalic acid, phthalic acid, trimellitic acid, benzoic acid, 4-hydroxybenzoic acid, acid! 4-hydroxymethylbenzoic acid, 4,4'-dicarboxybiphenyl, 2,6- dicar oxyanthraquinone, 4,4' -dicarboxyistilbene, 2,5,4'-tricaboxbiphenyl, 2, 5, 4'-tricarboxybenzophenone, 4,4'-dicar oxybenzophenone, 4'-dicarboxybenzyl, form-acet-hydroxybenzoic acid, acet-hydroxymethylbenzoic acid, a-bromo-p-toluic acid, bromo-benzoic acid, bromoacetic acid, p-tolualdehyde and terephthaldehyde. In one embodiment of the invention, the post-catalyst removal composition 200 may be in the form of a dry powder, wet cake, suspension, solution, liquid, liquid entrapped in gas or solid. In another embodiment of the invention the post-catalyst removal composition 200 may comprise any composition suitable for producing a dry carboxylic acid composition 280 to be described subsequently. A portion of the catalyst is removed via I of the catalyst-rich ijicor 185 and wash liquor 62 of the cooled carboxylic acid composition 170, or a composite of crystallized slurry 160, or a step oxidation composition 110 or a slurry composition 70, p an acid composition Raw carboxylic acid 30 to produce the post-catalyst removal composition 200 which has a catalyst concentration of less than 1000 ppm. The catalyst-rich liquor 185 comprises solder, catalyst, and an oxidation by-product (s). The flushing unit 62 comprises at least one solvent, at least one catalyst, at least one oxidation subduct (s). As used herein, the catalyst can be at least one catalyst previously described in the catalyst system. In another embodiment of the invention, the catalyst can be any catalyst used in an oxidation reaction of an aromatic feedstock. In another embodiment of the invention, a portion of the catalyst is removed when the post-catalyst removal composition 200 has a catalyst concentration of less than 500 ppm by weight. In another embodiment of the invention, a portion is that amount of catalyst that is removed such that the post-catalyst removal composition 200 has a catalyst concentration of less than 250 ppm by weight. Another embodiment of the invention, a portion is that amount of catalyst that is removed such that catalyst post-removal composition 200 has a catalyst concentration of less than 75 ppm by weight.

Another range is less than 500 ppm by weight. In yet other inter-flows, the catalyst concentration of the post-catalyst removal composition 200 is less than 20 ppm in weight less than 10 ppm by weight. At still other intervals, the catalyst concentration is less than 5 ppm by weight or less! that 1 ppm by weight, as used in the present "catalyst concentration" means the total concentration of all the catalyst in the composition.

The washing feed 175 comprises compositions that are capable of producing the previously disclosed catalyst demolition composition 200. In one embodiment of the invention, the washing feed 175 may be in the form of a liquid or a condensable vapor or a solution. In another embodiment of the invention, the washing feed 175 is greater than 50% by weight of water. In another embodiment of the invention, the washing feed 175 is greater than 75% by weight of water. In another embodiment of the invention, the washing feed 175 is greater than 90% by weight j of water. In another embodiment of the invention, the wash feed 175 is greater than 50% by weight of the solvent. In another embodiment of the invention, the wash feed 175 is greater than 75% by weight of solvent. In another embodiment of the invention, the wash feed 175 is greater than 90% by weight of solvent. In another embodiment of the invention, the washing feed 175 comprises at least one solvent, and optionally at least one compound selected from the group consisting of benzoic acid, isophthalic acid, italic acid, trimellitic acid, isomers of the acid: hydroxybenzoic acid isomers of hydroxymethylbenzoic acid and p-toluic acid. In another embodiment of the invention, the washing admixture 175 comprises compositions sufficient to produce the dry carboxylic acid composition 280 subsequently disclosed. In another form of invention the wash feed 175 comprises at least one solvent, and optionally at least one compound selected from the group consisting of isophthalic acid, acid! phthalic, trimellitic acid, isomers of hydroxymethylbenzoic acid, isomers of hydroxybenzoic acid, and isomers of toluic acid wherein at least one of the compounds is enriched above the concentration of the catalyst composition 200. In another embodiment of the invention, the washing feed 175 comprises at least one solvent, and optionally, one or more compounds selected from the group consisting of isophthalic acid, phthalic acid, trimellitic acid, benzoic acid, 4-hydrobenzoic acid, 4-hydroxymethylbenzoic acid, 4,4 '-dicarboxybiphenyl, 2,6-dicarboxyanthraquinone, 4,4'-dicarboxystastyneben, 2, 5,' -tricarboxybiphenyl, 2,5,4'-tricajrboxibenzophenone, 4, '-dicarboxibenzophenone, 4,4'-dicarboxybenzophenone, acid form acet-hydroxybenzoic acid, acet-hydroxymethylbenzoic acid, a-bromo-p-toluic acid, bromol-benzoic acid, bromoacetic acid, p-tolualdehyde and terefitaldehyde. In one embodiment of the invention the lavadp feed has a temperature ranging from the point of freezing of the solvent to about 90 ° C, or about 5 ° C to about 90 ° C, or about 5 ° C to about 195 ° C. C, or approximately 5 ° C a about 100 ° C or the freezing point of the solvent about 70 ° C, or about 5 ° C to about 70 ° C, or about 30 ° C to about 70 ° C, or the freezing point of the solvent at about 30 ° C . In one embodiment of the invention the lavadp ratio varies from about 0.2 to about 6.0, or about 0.2 to about 4.0, or about 0.2 to about 1.0, or about 0.4 to about 1, or about 0.5 to about 2.0, or about 1 to approximately 3. The "lavage ratio" as used herein means the total mass | of the washing feed 175 divided by the mass of the post-catalyst removal composition 200 on a b ^ se of dry solids. The catalyst removal zone 180 comprises at least one liquid solid separating device capable of contacting the cooled carboxylic acid composition 170 or a crystallized slurry composition 160, or a step oxidation composition 110 ti a composition of suspension 70, or an acid composition; crude carboxylic acid 30 with the washing feed 175 to produce a catalyst removal 200 composition. For example, the catalyst removal zone 180 comprises a liquid solid separating device in accordance with the present invention. that a post-catalyst removal composition 200 is generated and then washed with a wash solvent. Examples include, but are not limited to, a rotary vacuum drum filter, a vacuum band filter, a rotary press filter, a filter press, and a pressure sheet filter. Liquid solid separation devices, which can generate a cake but do not allow washing, are also useful when combined with a resuspension device. Liquid solid separation devices, such as a solid bowl centrifuge can be used to generate a cake that can be resuspended with a washing solvent in a separate mixing device to achieve washing by dilution. Washing by dilution often requires multiple stages of cake generation and subsequent resuspension operated in a countercurrent fashion. Step (g) comprises optionally contacting a post-catalyst removal composition 200 with an enrichment feed 220 in an Enrichment zone 210 to form an exhausted enrichment stream 230 and an enriched composition. 240; wherein the enriched composition 240 comprises one or more compounds selected from the group consisting of isophyllic acid, italic acid, trimellitic acid, hydroxymethylbenzoic acid isomers, acid isomers ibenzoic hydroxide, benzoic acid, and isomers of toluic acid and where at least one of the compounds is enriched above the concentration of the post-catalyst removal composition 200. In another embodiment of the invention, the enriched composition 240 comprises one or more compounds selected from the group consisting of isophthalic acid, phthalic acid, trimellitic acid, benzoic acid, 4-hydroxybenzoic acid, 4-hydroxymethylbenzoic acid, 4,4'-dicarboxybiphenyl, 2,6-dicarboxyanthraquinone, 4,4'- Dicarboxyldistylbenzene, 2, 5, 4 '-tricarboxybiphenyl, 2,5,4'-I tricajrboxibenzophenone, 4,' -dicarboxibenzophenone, 4,4'-dicarfc > oxybenzyl, form-acetyl-hydroxybenzoic acid, acet-hydroxymethylbenzoic acid, a-bromo-p-toluic acid, bromo-benzoic acid, bromoacetic acid, p-tolualdehyde and terephthaldehyde. [The term "enriched" means that the primary exit stream leaving an enrichment zone or plurality of enrichment zones or any zone, or any transportation mentioned herein has a higher concentration of any selected enrichment compound (s). that the primary inlet stream that goes into an enrichment zone or plurality of enrichment zones wherein the enrichment compound (s) comprises at least one compound or compounds selected from the group consisting of acid I Primary input current, all measured on a dry solid base. The enrichment feed 220 comprises compounds sufficient to enrich at least one compound selected from the group consisting of terephthalic acid, isophthalic acid, italic acid, benzene tricarboxylic acid isomers, benzoic acid, acid isomers! hydroxybenzoic acid isomers of hydroxymethylbenzoic acid, isomer of dicarboxybiphenyl, isomers of dicarboxyistilbene, isomers of tricarboxybiphenyl, isomers of tricarboxybenzophenone, isomers of dicarboxybenzophenone, isomers of dicarboxybenzyl, isomers of form-acetyl-hydroxybenzoic acid, isomers of acetyl-hydroxymethylbenzoic acid, isomers of a-bromo-toluic acid, bromo-benzoic acid, bromoacetic acid, isomers of tolua Ldehyde, isomers of benzyl alcohol, methylbenzyl alcohol isomers, and phthaldehyde isomers. In the other embodiment of the invention, the enrichment feed 220 may also include monomers, co-monomers, additives, or any of the compounds useful for making polyester or any combination thereof. In another embodiment of the invention enrichment or enrichment feeding compounds comprise one or more compounds selected from the group consisting of fluorenone isomers, diphenyl-isomethane isomers, diphenylethane isomers and saturated aromatic isomers. Examples of saturated aromatic isomers include, but are not limited to, cyclohexane carboxylic acid and 1,4-cyclohexane dicarboxylic acid. In another embodiment of the invention, the enrichment feed 220 comprises compounds sufficient to enrich the post-200 removal composition as shown in FIG. 7 such that on a dry solid base the enriched domain 240 comprises compositions identical to the dry carboxylic acid composition 280 described subsequently. There are no special limitations until! that the conditions of enrichment feed 220 other than this comprise sufficient compounds to enrich the post-removal and caking composition 200 with the enrichment compound (s) i degree that they do not contradict the statements made in the presejite. The multiple stirred kettles have been disclosed for additional control of the reaction as shown in US Pat. No. 4,110,316, incorporated herein by reference to the extent that this does not contradict the assertion made herein. The North American patent No. 3,054,776 discloses the use of lower pressure drops between reactors in a PET process, while US Patent No. 3,385,881 discloses multiple stage I as a writer within a reactor shell, both of these patents are incorporated herein by reference to the degree of qije do not contradict the statement made herein. These designs were improved to solve problems with entrapment or plugging, heat integration, heat transfer, reaction time, the number of reactors, etc., as described in U.S. Patent Nos. 3,118,843; 3,582,244; 3,600,137; 3,644 ^ 096; 3,689,461; 3,819,585; 4,235,844; 4,230,818; Y I 4,289 ^ 895; all of which are incorporated herein by reference to the extent that they do not contradict the claims made herein. In a PET 400 process as shown in Fig. 8, enrichment feed 220 may be introduced into the paste tank, sterilization reactors, and / or other locations in the process. The enrichment feed 220 can be introduced in i multiple locations or in only one location, either at a time or gradually over time. The raw materials for the manufacture of the polymers of growth stages and the copolymers of terephthalic acid (TPA) include monomer and comonomers, catalyst (s), and additives. Monomers and comonomers include, but are not limited to, diamines, diols, and diacids, etc. Polymers of important commercial growth stages that can be made using TPA as a monomer or comonomer include polyamides, polyesters, especially poly (ethylene terephthalate) (PET), co-polyamides, co-polystyrene and co-polyester-amides. It may be advantageous to introduce and achieve intimate mixing of the monomers or comonomers, catalyst (s) and / or additives with the acid I terephthalic, so they do not have to be added to the I proceed from polymerization separately from TPA. An acid process! Invented that allows the production of terephthalic acid, in the form of powder, paste, wet cake, or suspension, and that is enriched with certain monomers or comonomers, catalyst (s) and / or additives. This process is achieved; with intimate mixing with TPA to bypass the need to separate the addition of the materials in the PET manufacturing process. The following description will be given for the PET, but, it can be extended in a direct way to other polymers and copolymers of growth stages made using the TPA. The manufacture of PET involves the esterification of terephthalic acid with ethylene glycol, the formation of a prepolymer, and the polycondensation for I formaj: PET with a high enough molecular weight for the Subsequent proposed polymer processing and application that may include coatings, fibers, films, containers, and other items. Certain monomers or comonomers, catalyst (s) and / or additives may also be used. The much more common comonomers besides ethylene glycol (EG) are isophthalic acid (IPA or PIA) and cyclohexanedimethanol (CHDM). The most common catalysts for the manufacture of PET are antimony and titanium. Useful additives in the manufacture of PET include, but are not limited to, phosphorus compounds, dyes, pigments, colorants, reheating agents, polydispersity modifiers, antioxidants and stabilizers (thermal, oxidants, UV, etc.), coupling agents or chain extenders, termination agents at the end, telechlic modifiers, such as, for example, coordinated metal sulfo-isophthalic acid, aceta.Ldehyde reducing agents, acetaldehyde scavengers, regulators, agents to reduce the formation of diethylene glycol (DEG), antistatics, slip or antiblock agents, barrier modifiers, nucleators, titanium dioxide and other fillers and / or pacifiers, antinepsile agents, optical brighteners, etc. The introduction of such comonomers, catalyst (s) and / or additives is typically at various points in the process of manufacturing PET that are separated from the addition of TPA. Without boarding, it may be advantageous to introduce certain additives with the TEA, that is to say before the manufacturing process of PET especially comonomers, such as, isophthalic acid and dyes and dyes which are thermally stable. Thus, i comonomers, catalyst (s) and additives can be introduced i and. mix intimately with the TPA during the manufacturing process of TPA before during the PET manufacturing process. The steps of specific TPA manufactures in which the intimate introduction of the additive (s) can be achieved include the addition in the liquid solid separation device to isolate the TPA cake, in any drying equipment, to or in any line of transportation or process pipe, and before sending the TPA product in any container. Thus, the TPA product in any form, either dry solids (with residual water or acetic acid), wet cake (with some liquid water, or methanol, or EG, or some other diol or comonomer, or mixtures) wet paste ( with some liquid water, or methanol, or EG, or some other diol or comonomer, or mixtures) or suspension (with water or methanol, or EG, or some other diol, comonomer, or mixtures) can be enriched before use in the manufacture of PE. In addition, Figure 9 represents that enrichment feed 220 can be introduced and enrichment can occur at any point of the crystallized suspension composition 160 to dry carboxylic acid composition 280. Another embodiment of the invention is provided in Figurk 10. The enrichment process can be conducted on a carboxylic acid composition 214 in an enriched zone. Extended culture 213 to produce an enriched carboxylic acid composition 216. Enrichment feed 220 may comprise any composition previously or subsequently disclosed. There are no limitations on the different carboxylic acid composition that the carboxylic acid composition 214 comprises a carboxylic acid, optional solvent and optionally a catalyst. In another embodiment of the invention the carboxylic acid composition can be used to produce the dry carboxylic acid composition 280. It should also be noted that another embodiment of the invention, the enrichment zone 210 and the catalyst removal zone 180 are they can combine in a zone i that comprise at least one device that achieves both functions as shown in Figure 11. There are no special limitations for the different enrichment feed that has a proper omposition to enrich the post-removal composition. of catalyst 200. For example, the Enrichment feed 220 can be a solid, a wash, a suspension, a paste, solids, solution or liquid trapped in gas or solid. In one embodiment of the invention, the enrichment feed 220 comprises compositions capable of making the dried carboxylic acid cake composition 280. In another embodiment of the invention, enrichment feed 220 is only solid and is added at one point or through the process to produce the dry carboxylic acid cake composition 280. Figures 12, 13, 14 and 15 illustrate one embodiment of the invention which shows how an enrichment feed 220 can be obtained and how enrichment feed i is used throughout the process. In Figures 12, 13, 14, and 15, the enrichment feed (s) is represented as the stream 220. This is to illustrate that the enrichment feed (s) 220 can be taken from a variety of sources or a source and the feed (s) enrichment can have a variety of different compositions, different physical forms, and points of different addition in the process. Also, enrichment feed 220 may be added one time, intermittently, or gradually through the process. : Figure 15 illustrates one embodiment of the invention about 'how an enrichment feed 220 can be obtained. At least a portion of the catalyst rich liquor 185 is fed to a cooling zone and / or concentration 300 to generate a stream of concentrated mother liquor 310 and a stream of solvent 311. Removal Sufficient solvent in the cooling zone and / or concentration 300 is achieved such that the stream rich in concentrated catalyst 310 may have a percent of I have substances that vary from 10% by weight to 45% by weight. i A portion of the mother liquor stream Concentrated I 310 and a stream of extraction solvent 323 I are fed to an extraction zone 320 to generate a catalyst-rich stream 324 and a depleted stream of catalyst 350. The remainder of the concentrated mother liquor stream 310 and a wash stream 331 are fed to a separation line. of solid-liquid (Zone SLS), which generated a stream of wet cake 340 and the liquor stream, of washing 332, which comprises mother liquor and washing liquor. The wet cake stream 340 can be used as an enrichment feed 220 and a portion of the wet cake stream 340 can be sent to the product filter or product dryer to enrich the product stream with at least a portion of the product. the contents of the wet cake stream 340. Alternatively, a portion of the wet cake stream 340 and a portion of the spent stream of catalyst 350 can be fed to a mixing zone optionally where the two streams are mixed to form an enrichment feed 220 and a portion of this stream can be sent to a product filter or dryer. product for enriching the product stream with at least a portion of the contents of the enrichment feed 220. I The extraction zone 320 comprises at least one extractor i. The extraction solvent 223 used in the extractor should be substantially insoluble in water to minimize the amount of dissolved organic solvent in the I aqueous fraction. Additionally, the extraction solvent 323 is preferably an azeotropic agent that serves to aid: the recovery of the solvent from the organic extractor. The solvents which have proven to be particularly useful are C1 to C6 alkyl acetates, particularly n-propyl acetate (n-PA), isopropyl acetate, isobutyl acetate, sec-butyl acetate, ethyl acetate and n-acetate. -butyl, although other water-insoluble organic solvents having an appropriate density and a sufficiently low boiling point can also be used, such as p-xylene. N-propyl acetate and isopropyl acetate are particularly preferred because of their relatively low solubility in water, excellent azeotropic behavior, and I its ability to remove the remaining acetic acid as well as high-boiling organic impurities from the aqueous mixture. The extraction can be carried out using solvent ratios of from about 1 to about 4 parts by weight of solvent per extractor feed depending on the feed composition and extractor. The space velocities of the combined feeds to the extractor generally vary from 1 to about 3 hr. "1 Although the extraction can be done at room temperature and pressure, heating the solvent and extractor at about 30 ° C to about 70 ° C, or about 40 ° C to about 60 ° C, it can be used Figures 12, 13, and 14 illustrate one embodiment of the invention which shows how a 220g aeration feed can be used throughout the process. 10 comprising reactants and catalyst is fed to the primary oxidation zone 20 generating a crude carboxylic acid composition 30. The crude carboxylic acid composition 30 and a solvent stream 50 are fed to the liquid shift zone 40 to achieve a change of partial solvent exchanging a portion of the oxidation solvent present in stream 30 with the pure solvent that generates a 60 displaced solvent stream and a composition stream of suspension 70. The suspension composition 70 and a stream of oxygen-containing gas 106 are fed to an oxidation zone of steps 80 to generate a step oxidation composition 110. The oxidation composition of steps 110 and a stream of solvent 101 they are fed to a liquid displacement zone 100 to achieve a change 1 of partial softener that exchanges a portion of the oxidation solvent i present in the oxidation composition of i steps 110 with the pure solvent generating a displaced solvent stream 102 and a oxidation composition of the post-solvent 115 change stages. Oxidation composition of post solvent exchange stages 115 is fed to a crystallization zone 120 which generates a stream of crystallized slurry composition 160, an optional solvent vapory stream 121, and an optional liquid solvent stream 122. The stream of composition of The crystallized suspension 160 and an optional enrichment feed 220 are fed to a cooling zone 165 where a stream of cooled carboxylic acid composition 170 and an optional oxidation solvent stream 163 are generated. The cooled carboxylic acid composition 170, a wash feed 175, and an optional enrichment feed 220 are fed to one! catalyst removal zone 180 to generate a catalyst removal composition 200, the liquor catalyst 100, and a wash liquor 162, and a depleted enrichment feed 230. The catalyst removal composition 200, the exchange solvent stream 201, and an optional enrichment feed 220 are fed to an area optional solvent change 205 to generate a change solvent liquor 202, and the post-solvent exchange composition 206. The post-solvent exchange composition 206 and a feed of I enrichment 220 is fed to enrichment zone 210 to generate a stream of enriched carboxylic acid composition 240 and a depleted enrichment feed 230. Enriched composition 240 and optional enrichment ailimentation 220 are fed to an optional drain zone 250 to generate a dewatered carboxylic acid composition 260.! The catalyst removal zone 180, the solvent exchange zone 205, the enrichment zone 210, the drain zone 250, and optionally the drying zone 270 can be achieved in a single liquid solid separation device, preferably a continuous pressure or vacuum filter and much more preferably a vacuum band filter > . A continuous pressure drum filter or a rotary vacuum drum filter can also be used. The dewatered enriched carboxylic acid composition 260, and an optional enrichment ailimentation 220 are fed an optional drying zone 270 for generating a dry enriched carboxylic acid composition 280 and a solvent vapor stream 275. In another embodiment of the invention, the enrichment feed 220 comprises water in an amount greater than 50% by weight. In another embodiment of the invention, the enrichment feed 220 comprises water in an amount greater than 75% by weight. In another embodiment of the invention, enrichment feed 220 comprises water in an amount greater than 95%. In another embodiment of the invention, the enrichment feed 220 comprises water in an amount greater than 99% by weight. ! In another embodiment of the invention, the post-catalyst removal composition i enters the enrichment zone 210 at a temperature in a range of about 200 ° C to the freezing point of the enrichment feed 220. In another embodiment of the invention, the post-catalyst removal composition 200 I enter! to the enrichment zone 210 at a temperature in a range of about 100 ° C to the enrichment feed freezing point 220. In another embodiment of the invention, the post-catalyst removal composition i 200 inlet to enrichment zone 210 at a temperature I in a range of about 200 ° C to about 0 ° C.; In another embodiment of the invention, the composition of post catalyst removal 200 enters enrichment zone 210 at a temperature in a range of about 0 ° C to 100 ° C. Other intervals are smaller than 100 ° C at 20 ° C; and 40 ° C to less than 100 ° C. The enrichment zone 210 at least comprises a device sufficient to provide a sufficient amount of contact time between the enrichment feed 220 and the post-catalyst removal composition 200 to allow at least one compound selected from the group consisting of of benzoic acid, isophthalic acid, italic acid, trimellitic acid, isomers of hydroxybenzoic acid, isomers of hydroxymethylbenzoic acid, and isomers of toluic acid to be enriched. In another embodiment of the invention, the enrichment zone 210 or the extended enrichment zone i 213 comprises a device that provides a sufficient amount of contact time between the enrichment feed and the post-catalyst removal composition 200 or the composition of carboxylic acid 214 to allow the monomers, comonomers, additives, and other compounds useful in the production of polyesters to be enriched. In another embodiment of the enrichment zone 210 or the extended enrichment zone 213 comprises at least one device selected from the group consisting of a 'band filter, pressure filter, pressure filter. rotary, centrifuges capable of adding solids and or a washing stream such as a basket centrifuge? perforated, a disc stack centrifuge etc., and the like. ! In another embodiment of the invention, the enriched composition 240 on a dry solids basis encompasses all possible combinations of compositions of the dry carboxylic acid composition 280 described subsequently in this description. The dry solids base will be described subsequently in that description. ! All compositions are measured on a dry solids basis to be described subsequently in the description. All measurements and claims in ppm are ep ppm by weight on a dry solids basis. Step (h) comprises optionally dewatering the enriched composition 240 in a drain zone 250 to form a dewatered catalyst post-removal composition 260. Removal of water can be conducted by any means known in the art. The removal of water res in the post-removal composition of dewatered catalyst 260 having a moisture content of less than 25% moisture by weight. Other ranges of moisture content are less than 15% by weight of moisture or less than 10% by weight of moisture or less than 5% by weight of i humidity. In yet another embodiment of the invention, water removal can be achieved through the use of primarily mechanical means for drying and where the majority of drying is not achieved through evaporation. The majority as used herein means greater than 50%. Step (i) comprises filtering and optionally drying the enriched composition 240 or the post-dewatered catalyst removal composition 260 in a filtration and drying zone 270 to remove a portion of the solvent from the enriched composition 240 or the composition of removal of dewatered catalyst 260 to produce the co-deposition of dry carboxylic acid 280. Enriched composition 240 or post-dewatered catalyst removal composition 260 is removed from enrichment zone 210 or drainage area 250 and fed to an area Filtration and drying 270.! In one embodiment of the invention, the filter cake goes through a removal step with initial solvent, then rinsed with acid wash to remove the I residual catalyst and then the solvent is removed again before being sent to the dryers. The drying zone 270 comprises at least one secadpr and can be achieved by any means known in the art which is capable of evaporating at least 10% of the volatiles remaining in the filter cake to produce the dry carboxylic acid composition 280. For example, indirect contact dryers that include a rotary steam pipe dryer, a Single Shaft Porcupine® Processor dryer, and a Bepex Solidaire ® Processor can be used for drying to produce a dry carboxylic acid composition 280. Direct contact dryers that include a fluid bed dryer and drying on a conveyor line can be used for drying to produce a carboxylic acid composition seca 280. In another embodiment of the invention, drying may be accomplished in a solid-liquid separation device similar to a vacuum band filter or a rotary pressure drum filter by allowing a gas stream to flow. through the filter cake removing volatiles in this way. In another embodiment of the invention, a solid-liquid separation device can comprise any combination of the following zones: a catalyst removal zone, an enrichment zone, a drain zone and a drying zone. An acid composition | Dry carboxylic acid can be a carboxylic acid composition with less than 5% moisture, preferably i less than 2% moisture and much more preferably less than i 1% of | moisture, and even more preferably less than 0.5%, and still more preferably less than 0.1%.

In one embodiment of the invention, the dried carboxylic acid composition 280 has a b * less than about 9.0. In another embodiment of the invention, the colon b * of the dry carboxylic acid composition 280 is less than about 6.0. In another embodiment of the invention, the color b * of the dried carboxylic acid composition 280 is less than about 5.0. In another embodiment of the invention, the color b * of the dried carboxylic acid composition 280 is less than about 4.0. In another embodiment of the invention, the color b * of the dry carboxylic acid composition 280 is less than about 3. The b * cushion is one of the attributes of three colors measured on a base instrument of spectroscopic reflectance. A Hunter Ultrascan XE instrument in the reflectance mode is typically the measuring device. Positive readings mean the degree of yellow (or blue absorbance) while the readings mean the degree of blue (or absorbance of yellow). Compositions comprising at least one Carboxylic Acid I. In one embodiment of the invention, the dry carboxylic acid composition 280 comprises: (1) carboxylic acid in an amount greater than 50 weight percent,: or greater than 60 percent by weight, or greater than 70 percent by weight, or greater than 80 percent by weight, or greater 93 percent by weight, or greater than 95 percent by weight, or greater than 97 percent, or greater than 98 percent, or greater than 98.5 percent, or greater than 99 percent, or greater than (i) isomers of carboxybenzaldehyde in an amount ranging from 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm or ranging from 1 ppm to 125 pbm; isomers of toluic acid in an amount ranging from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm, or I that would go from 1 ppm to 125 ppm; i where the total concentration of toluic isomers varies from 1 ppm to 2000 ppm to 500 ppm, or from 1 ppm to 250 ppm minus two, or at least three, or by | at least four, or at least five, or at least six, or at least seven, or at least eight, or at least nine, or at least ten, or at least eleven, or at least less twelve or at least thirteen, or at least fourteen or at least fifteen, or at least sixteen, or at least seventeen, or at least eighteen, or at least nineteen, or at least twenty, or all of the following: (a) terephthalic acid in an amount of at least 50 ppm, or varying from 50 ppm to 2000 ppm, or varying from 75 ppm to 150 D ppm, or varying from 100 ppm or 1000 ppm , or which varies from 150 ppm or 500 ppm; (b) isophthalic acid in an amount of at least 50 ppm, or at least 75 ppm, or at least 100 ppm; or what variable 50 ppm to 500 ppm, or varying from 75 ppm to 400 ppm, or ranging from 100 ppm to 300 ppm; (f) isomers of hydroxybenzoic acid in an amount of at least 3 ppm, at least 5 ppm, or at least 20 ppm, or ranging from 3 ppm to 200 ppm, or ranging from 5 ppm to 175 ppm, or which varies from 20 ppm to 150 ppm; (g) isomers of hydroxymethylbenzoic acid in an amount of at least 40 ppm, or at least 80 ppm, or at least 100 ppm, or ranging from 40 ppm to 200 ppm, or ranging from 80 ppm to 180, or ranging from 100 ppm to 160 ppm; h) isomers of dicarboxybiphenyl in an amount ranging from 20 ppm to 150 ppm, or ranging from 25 ppm to 100 ppm, or ranging from 25 ppm to 75 ppm; j (i) isomers of dicarboxystilbene in an amount varying from greater than 7 ppm; or greater than 10 ppm; (j) isomers of tricarboxybiphenyl in an amount ranging from 8 ppm to 100 ppm, or ranging from 9 ppm to 50 ppm, or varying from 10 ppm to 25 ppm; j (k) isomers of tricarboxybenzophenone in an amount ranging from 5 ppm to 100 ppm, or ranging from 6 ppm to 75 ppm, or quej varies from 7 ppm to 60 ppm; (1) dicarboxybenzophenone isomers in an amount ranging from 10 ppm to 150 ppm, or ranging from 12 ppm to 100 ppm, or ranging from 15 ppm to 75 ppm; (m) dicarboxybenzyl isomers in an amount that it varies from 1 ppm to 30 ppm, or it varies from 2 ppm to 20 ppm, or it varies! from 3 ppm to 10 ppm; (N) isomers of form-acet-hydroxybenzoic acid in I an amount ranging from 1 ppm to 20 ppm, or ranging from 2 ppm to 15 ppm, or ranging from 3 ppm to 10 ppm; (O) isomers of acet-hydroxymethylbenzoic acid in an amount ranging from 1 ppm to 30 ppm, or ranging from 2 ppm to 20 ppm, or ranging from 3 ppm to 15 ppm; l (p) isomers of a-bromo-toluic acid in an amount ranging from 1 ppm to 100 ppm, or varying from 2 ppm to 50 ppm, or! it varies from 5 ppm to 25 ppm; (B) bromo-benzoic acid in an amount ranging from 5 ppm to 50 ppm, or ranging from 10 ppm to 40 ppm, or ranging from 15 ppm to 35 ppm; ! (r) bromo-acetic acid in an amount that varies from 1 tolualdehyde in an amount that varies from 7 ppm to! 50 ppm, or varying from 8 ppm to 25 ppm, or varying from 9 ppm to 20 ppm; (t) phthaldehyde isomers in an amount ranging from 0.25: ppm to 10 ppm, or varying from 0.5 ppm to 5 ppm, or varying! from 0.75 ppm to 2 ppm; wherein the compound (s) selected in (3) are different from the compound or compound selected in (1) and (2); and optionally, (4) at least one, or at least two, or at least three, at least four at least five, or at least seven, or at least seven, or at least eight, or all of the following: i! (a) terephthalic acid in an amount of at least 1 ppm, b varying from 1 ppm to 5000 ppm, or varying from 5 ppm to 2500 ppm, or varying from 10 ppm to 2000 ppm , or varying from 15 ppm to 1000 ppm, or varying from 20 ppm to 500 ppm; (b) isophthalic acid in an amount of at least 1 ppm, ranging from 1 ppm to 5000 ppm, or varying from 5 ppm to 2500 ppm, or varying from 10 ppm to 2000 ppm, or varying from 15 ppm to 1000 ppm, or varying from 20 ppm to 500 ppm; (c) italic acid in an amount of at least 1 ppm, or ranging from 1 ppm to 3000 ppm, or ranging from 2 ppm to 2000 ppm, p ranging from 3 ppm to 1000 ppm, or varying from 4 ppm to 1000 ppm; ppm at 500 ppm; I (d) isomers of benzene tricarboxylic acid in an amount of at least 1 ppm, or ranging from 1 ppm to 3000 ppm or! which varies from 5 ppm to 2000 ppm, or which varies from 10 ppm to 1000 ppm, or which varies from 20 ppm to 500 ppm; (e) benzoic acid in an amount of at least 1 ppm, p ranging from 1 ppm to 3000 ppm, or ranging from 5 ppm to 2000 ppm, or ranging from 10 ppm to 1000 ppm, or varying from 20 ppm to 1000 ppm; ppm a! 500 ppm; (f) isomers of hydroxybenzoic acid in an amount of I at least 1 ppm, or varying from 1 ppm to 500 ppm, or varying, from 5 ppm to 400 ppm, or varying from 10 ppm to 200 ppm; [g) isomers of hydroxymethylbenzoic acid in an amount of at least 1 ppm, or ranging from 1 ppm to 500 ppm, 6 varying from 5 ppm to 400 ppm, or varying from 10 ppm to dicarboxybiphenyl isomers in an amount of ppm, or ranging from 1 ppm to 500 ppm, or varying from 5 to ppm at 400 ppm, or ranging from 10 ppm to 200 ppm; wherein the compound or compounds selected in (4) are different from the compound or compound selected in (3). II. In another embodiment of the invention, the dry carboxylic acid composition 280 comprises: (1) carboxylic acid in an amount greater than 50 percent by weight, or greater than 60 percent by weight, or greater than 70 percent by weight weight, or greater than 80 percent by weight, or greater than 90 percent by weight, or greater than 95 percent by weight, or greater than 97 percent, or greater than 98 percent, or greater than 98.5 percent , or greater than 99 per cent, or greater than 99.5 weight percent; and (2) (k) isomers of carboxybenzaldehyde (CBA) in an amount ranging from 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 ppm, p ranging from 1 ppm to 250 ppm, or varying from 1 ppm at 125 ppm; or (b) isomers of toluic acid (TA) in an amount that ? it varies! from 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm, or ranging from 1 ppm to 125 ppm; oj (c) both of the following: (1) carboxybenzaldehyde isomers (CBA) in an amount ranging from 1 ppm to 1000 ppm, or varying from 1 ppm to 500 ppm, or varying from 1 ppm to 250 ppm or it varies from 1 ppm to 125! ppm; (2) isomers of toluic acid (TA) in an amount ranging from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm, or ranging from 1 ppm to 125 ppm; wherein the total concentration of CBA and TA varies from 1 ppm to 2000 ppm, 1 ppm to 1000 ppm, or from 1 ppm to 500 ppm, or from 1 ppm to 250 ppm, from 1 ppm to 125 ppm; and! (3) at least two, or at least three, or at least four, or at least five, or at least six, or at least seven, or all of the following: (a) acid isophthalic in an amount of at least 50 ppm, or varying from 50 ppm to 2000 ppm, or varying from 75 ppm to 1500 ppm, or varying from 100 ppm to 1000 ppm, or varying from 150 ppm to 500 ppm , or varying from 50 ppm, or 75 ppm, or 100 ppm, p 150 ppm to 500 ppm, or 1000 ppm, or 2000 ppm, or 0.5% by weight or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, I or 10% by weight, or 25% by weight, or 49% by weight, or it varies! of 500 ppm, or 1000 ppm at 2000 ppm, or 0.5% by weight or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight weight, or 25% by weight, or 49% by weight; b) isomers of benzene tricarboxylic acid varying from 140 ppm to 1000 ppm, or varying from 175 ppm to 750 ppm, or varying from 200 ppm to 500 ppm, or varying from 150 ppm, or 175 ppm, or 200 ppm at 500 ppm, or 750 ppm, or 1000 ppm; (c) isomers of dicarboxybiphenyl in an amount ranging from 20 ppm to 150 ppm, or varying from 25 ppm to 100 ppm, or ranging from 25 ppm to 75 ppm, or varying from 200 ppm, or 300 ppm, p 500 ppm at 1000 ppm, or 2000 ppm, or 0.5% by weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight by weight, or 49% by weight; (d) italic acid in an amount of at least 20 ppm, or at least 50 ppm, or at least 100 ppm, or ranging from 20 ppm to 1000 ppm, or ranging from 50 ppm to 750 ppm, or varying from 100 ppm to 500 ppm, or varying from 20 ppm, 50 ppm, LOO ppm to 500 ppm, or 750 ppm, or 1000 ppm, or 2000 ppm, or 0.5% by weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight, or varying by 500 ppm, or 750 ppm, or 1000 ppm by weight 2000 ppm, or 0.5% by weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10%; by weight, or 25% by weight, or 49% by weight; (e) hydroxybenzoic acid isomers ranging from 3 ppm to 200 ppm, or ranging from 5 ppm to 175 ppm, or ranging from 20 ppm to 150 ppm, or varying from 3 ppm, or 5 ppm or 20 ppm at 150 ppm, or 175 ppm, or 200 ppm, or 500 ppm, or 1000 ppm; (f) hydroxymethylbenzoic acid in an amount of at least 40 ppm, or at least 80 ppm, or at least 100 ppm, or ranging from 40 ppm to 200 ppm, or ranging from 80 ppm to 180, or which varies from 100 ppm to 160 ppm, or which varies from 40 ppm, or 80 ppm, b 100 ppm to 500 ppm, or 1000 ppm, or 2000 ppm, or 0.5% by weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight; (g) benzoic acid varying from 60 ppm to 500 ppm, or ranging from 75 ppm to 400 ppm, or ranging from 100 ppm to 300 ppm, or that | it varies from 60 ppm, or 75 ppm, or 100 ppm to 300 ppm, or 500 ppm, b 1000 ppm. (h) terephthalic acid in an amount of at least 20 ppm, or at least 50 ppm, or at least 100 ppm, or ranging from 20 ppm to 1000 ppm, or ranging from 50 ppm to 750 ppm, I or it varies from 100 ppm to 500 ppm, or it varies from 20 ppm, 50 ppm, 100 ppm to 500 ppm, or 750 ppm, or 1000 ppm, or 2000 ppm, or I 0.5% by weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight, or it varies from 500 ppm, or 750 ppm, or 1000 ppm to 2000 ppm, or 0.5% by weight, I or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, I or 10%! in Weight ° 25% by weight, or 49% by weight; III. In one embodiment of the invention, the dry carboxylic acid composition 280 comprises: (1) carboxylic acid in an amount greater than 50 percent at or greater than 60 percent by weight, or greater than 70 per cent by weight, or greater than 80 percent by weight, or greater than 90 percent by weight, or greater than 95 percent by weight, or greater than 97 percent, or greater than 98 percent, or greater than 98.5 percent, or greater than 99 percent, or greater than 99-5 percent by weight; and (2)) carboxybenzaldehyde isomers (CBA) in an amount ranging from 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 ppm, which varies from 1 ppm to 250 ppm, or which varies from 1 ppm to 500 ppm. ppm to toluic acid (TA) somers in an amount ranging from 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm, or ranging from 1 ppm to 125 ppm; , (c) both of the following: (1) carboxybenzaldehyde isomers (CBA) in an amount ranging from 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm or which varies from 1 ppm to: 125 ppm; (2) isomers of toluic acid (TA) in an amount ranging from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm, or ranging from 1 ppm to 125 ppm; wherein the total concentration of CBA and TA varies from 1 ppm to 2000 ppm, 1 ppm to 1000 ppm, or from 1 ppm to 500 ppm, or from 1 ppm to 250 ppm, or from 1 ppm to 125 ppm; and (3) at least two, or at least three, or at least four, or five, or all of the following: i (a) isophthalic acid in an amount of at least 50 ppm, or ranging from 50 ppm to 2000 ppm, or varying from 75 ppm to 1500 ppm, or varying from 100 ppm to 1000 ppm, or varying from 150 pjpm to 500 ppm, or varying from 50 ppm, or 75 ppm, or 100 ppm, p '150 ppm to 500 ppm, or 1000 ppm, or 2000 ppm, or 0.5 % by weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10%! by weight, or 25% by weight, or 49% by weight, or varying from 500 ppm, or 1000 ppm to 2000 ppm, or 0.5% by weight or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight; ! (b) isomers of benzene tricarboxylic acid varying from 140 ppm to 1000 ppm, or varying from 175 ppm to 750 ppm, or varying from 200 ppm to 500 ppm, or varying from 150 ppm, or 175 ppm, or 200 ppm at 500 ppm, or 750 ppm, or 1000 ppm; (c) dicarboxybiphenyl isomers in an amount ranging from 20 ppm to 150 ppm, or varying from 25 ppm to 100 ppm, or varying from 25 ppm to 75 ppm, or varying from 200 ppm, or 300 ppm, or 500 ppm at 1000 ppm, or 2000 ppm, or 0.5% by weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight; or 25% by weight, or 49% in fish) italic acid in an amount of at least 20 ppm, or at least 50 ppm, or at least 100 ppm, or ranging from 20 ppm to 1000 ppm, or It varies from 50 ppm to 750 ppm, or it varies from 100 ppm to 500 ppm, or it varies from 20 ppm, 50 ppm, 100 ppm at 500 ppm, or 750 ppm, or 1000 ppm, or 2000 ppm, or 0.5% by weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight, or ranging from 500 ppm, or 750 ppm, or 1000 ppm to 2000 ppm, or 0.5% by weight, I or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10%! by weight, or 25% by weight, or 49% by weight; (e) benzoic acid varying from 60 ppm to 500 ppm, or varying; from 75 ppm to 400 ppm, or ranging from 100 ppm to 300 ppm, 5 ppm, or 100 ppm to 300 ppm, or 500 ppm in an amount of at least 20 ppm, or at least 50 ppm, or at least 100 ppm, or ranging from 20 ppm to 1000 ppm, or ranging from 50 ppm to 750 ppm, or that: varies from 100 ppm to 500 ppm, or it varies from 20 ppm, 50 ppm, 100 ppm to 500 ppm, or 750 ppm, or 1000 ppm, or 2000 ppm, or 0.5% ^ n weight, or 1% by weight, or 2% by weight, or 3% in weight, or 5% in pejso, or 10% in weight, or 25% in weight, or 49% in weight, or that varies: of 500 ppm, or 750 ppm, or 1000 ppm to 2000 ppm, or 0.5% in weight , or 1%, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight; IV. In one embodiment of the invention, the dried carboxylic acid composition 280 comprises: ij (1) carboxylic acid in an amount greater than 50 percent i in peiso, or greater than 60 percent by weight, or greater than 70 percent in weight, or greater than 80 percent by weight, or greater: than 90 percent by weight, or greater than 95 percent by weight, or greater than 97 percent, or greater than 98 percent, or greater, than 98.5 percent, or greater than 99 percent, or greater than 99.5 weight percent; and (2) (fr) isomers of carboxybenzaldehyde (CBA) in an amount ranging from 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 ppm, b varying from 1 ppm to 250 ppm, or varying from 1 ppm at 125 pjpm; or (b) isomers of toluic acid (TA) in an amount ranging from 1 ppm to 1000 ppm, or varying from 1 ppm to 500 ppm, or varying from 1 ppm to 250 ppm, or varying from 1 ppm to 125 ppm; (c) both of the following: (1) carboxybenzaldehyde isomers (CBA) in a quantity ranging from 1 ppm to 1000 ppm, or varying from 1 ppm to 5001 ppm, or varying from 1 ppm to 250 ppm or which varies from 1 ppm to 125 ppm; (2) isomers of toluic acid (TA) in an amount ranging from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm, or! it varies from 1 ppm to 125 ppm; where the total concentration of CBA and TA varies from 1 ppm to 2000 ppm, 1 ppm to 1000 ppm, or from 1 ppm to 500 ppm,? or from L ppm to 250 ppm, or from 1 ppm to 125 ppm; and (3) for at least two, or at least three, or four, or all of the following: (a) isophthalic acid in an amount of at least 50 ppm, or varying from 50 ppm to 2000 ppm, or varying from 75 ppm to 1500 ppm, or varying from 100 ppm to 1000 ppm, or varying from 150 ppm to 500 ppm, or varying from 50 ppm, or 75 ppm, or 100 ppm, D 150 ppm to 500 ppm, or 1000 ppm, or 2000 ppm, or 0.5% by weight, or 1% by weight, or 2 % by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight, or varying from 500 ppm, or 1000 ppm to 2000 ppm, or 0.5 % by weight or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% e: weight, or 49% by weight; (b) isomers of benzene tricarboxylic acid varying from 140 ppm to 1000 ppm, or that varies from 175 ppm to 750 ppm, or that I varies from 200 ppm to 500 ppm, or varying from 150 ppm, or 175 ppm, b 200 ppm to 500 ppm, or 750 ppm, or 1000 ppm; (c) isomers of dicarboxybiphenyl in an amount ranging from 20 ppm to 150 ppm, or varying from 25 ppm to 100 ppm, or ranging from 25 ppm to 75 ppm, or varying from 200 ppm, or 300 ppm, b 500 ppm at 1000 ppm, or 2000 ppm, or 0.5% by weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight; or 25% by weight, or 49% by weight; (D) italic acid in an amount of at least 20 ppm, or at least 50 ppm, or at least 100 ppm, or I vary from 20 ppm to 1000 ppm, or varying from 50 ppm to 750 ppm, or varying from 100 ppm to 500 ppm, or varying from 20 ppm, 50 ppm, 100 ppm to 500 ppm, or 750 ppm, or 1000 ppm, or 2000 ppm, or 0. 5% by weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight, or it varies from 500 ppm, or 750 ppm, or 1000 ppm to 2000 ppm, or 0.5% by weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% ' by weight, or 25% by weight, or 49% by weight; , (e) terephthalic acid in an amount of at least 20 ppm, or at least 50 ppm, or at least 100 ppm, or varying from 20 ppm to 1000 ppm, or varying from 50 ppm to 750 ppm , or which varies from 100 ppm to 500 ppm, or which varies from 20 ppm, 50 ppm, 100 ppm to 500 ppm, or 750 ppm, or 1000 ppm, or 2000 ppm, or 0. 5% pn weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by peb, or 10% by weight, or 25% by weight, or 49% by weight, or varying of 500 ppm, or 750 ppm, or 1000 ppm at 2000 ppm, or 0.5% by weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight by weight, or 25% by weight, or 49% by weight; V. In one embodiment of the invention, the dry carboxylic acid composition 280 comprises: (1) carboxylic acid in an amount greater than 50 percent by weight, or greater than 60 percent by weight, or greater than 70 percent by weight by weight, or greater than 80 percent by weight, or greater! than 90 percent by weight, or greater than 95 percent by weight, or greater than 97 percent, or greater than 98 percent, or greater than 98.5 percent, or greater than 99 percent, or greater than 99.5 percent cent in weight; and (2) (a) isomers of carboxybenzaldehyde (CBA) in an amount (3) ppr at least two, or three, or all of the following: | (a) isophthalic acid in an amount of at least 50 ppm, | D varying from 50 ppm to 2000 ppm, or varying from 75 ppm at 150 ppm, or ranging from 100 ppm to 1000 ppm, or varying from 150 pjpm to 500 ppm, or varying from 50 ppm, or 75 ppm, or 100 ppm, | or 150 ppm to 500 ppm, or 1000 ppm , or 2000 ppm, or 0.5% by weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, I or 10%! by weight, or 25% by weight, or 49% by weight, or varying from 500 ppm, or 1000 ppm to 2000 ppm, or 0.5% by weight or 1% by weight, or 2% by weight, or 3% by weight weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight; (b) benzene-tricarboxylic acid isomers that vary from 140 ppm at 1000 ppm, or varying from 175 ppm to 750 ppm, or varying from 200 ppm to 500 ppm, or varying from 150 ppm, or 175 ppm, b 200 ppm to 500 ppm, or 750 ppm, or 1000 ppm; (c) dicarboxybiphenyl isomers in an amount ranging from 20 ppm to 150 ppm, or varying from 25 ppm to 100 ppm, or varying from 25 ppm to 75 ppm, or varying from 200 ppm, or 300 ppm, or 500 ppm at 1000 ppm, or 2000 ppm, or 0.5% by weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight weight, or 49% by weight; (d) terephthalic acid in an amount of at least 50 ppm, ranging from 50 ppm to 2000 ppm, or varying from 75 ppm to 15 ppm, or varying from 100 ppm to 1000 ppm, or varying from 150 pjpm at 500 ppm, or varying from 50 ppm, or 75 ppm, or 100 ppm, or 150 ppm to 500 ppm, or 1000 ppm, or 2000 ppm, or 0.5% by weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight, or varying from 500 pjpm, or 1000 ppm to 2000 ppm, or 0.5% by weight or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight; SAW. In one embodiment of the invention, the acid composition Dry carboxylic acid 280 comprises: (1) carboxylic acid in an amount greater than 50 percent by weight, or greater than 60 percent by weight, or greater than 70 percent by weight, or greater than 80 percent by weight, or higher than 90 percent by weight, or greater than 95 percent by weight, or greater than 97 percent, or greater than 98 percent, or greater than 98.5 percent, or greater than 99 percent, or greater than 99.5 percent in weigh; and (2) (a) carboxybenzaldehyde isomers (CBA) in an amount ranging from 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm, or varying from 1 ppm to 125 pjom; or (b) isomers of toluic acid (TA) in an amount ranging from 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm, or ranging from 1 ppm to 125 ppm; or! j (c) both of the following: (1) carboxybenzaldehyde isomers (CBA) in one or varying from 1 ppm ppm or varying from 1 (TA) in an amount ranging from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm, or quei varies from 1 ppm to 125 ppm; where the total concentration of CBA and TA varies from 1 pm to 2000 ppm, 1 ppm to 1000 ppm, or from 1 ppm to 500 ppm, or from 1 ppm to 250 ppm, or from 1 ppm to 125 ppm; and (3) at least two, or all of the following: (a) isophthalic acid in an amount of at least 50 ppm, ranging from 50 ppm to 2000 ppm, or varying from 75 ppm to 150 ppm , or that varies from 100 ppm to 1000 ppm, or that varies from 150 pjpm at 500 ppm, or varying from 50 ppm, or 75 ppm, or 100 ppm, or 150 ppm to 500 ppm, or 1000 ppm, or 2000 ppm, or 0.5% by weight, or 1% by weight, or 2 % by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight, or varying from 500 ppm, or 1000 ppm to 2000 ppm, or 0.5 % by weight or 1% in! weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight; (b) isomers of benzene tricarboxylic acid varying from 140 ppm to 1000 ppm, or varying from 175 ppm to 750 ppm, or varying; from 200 ppm to 500 ppm, or varying from 150 ppm, or 175 ppm, p 200 ppm to 500 ppm, or 750 ppm, or 1000 ppm; (c) dicarboxybiphenyl isomers in a varying amount! from 20 ppm to 150 ppm, or ranging from 25 ppm to 100 ppm, or ranging from 25 ppm to 75 ppm, or varying from 200 ppm, or 300 ppm, or 500 ppm to 1000 ppm, or 2000 ppm, or 0.5% by weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight,! or 25% by weight, or 49% by weight; VII. In one embodiment of the invention, the dry carboxylic acid composition 280 comprises: (1) carboxylic acid in an amount greater than 50 percent by weight, or greater than 60 percent by weight, or greater than 70 percent by weight, or greater than 80 percent by weight, or greater than 90 percent by weight weight, or greater than 95 percent by weight, or greater than 97 percent, or greater than 98 percent, or greater than 98.5 percent, or greater than 99 percent, or greater than 93.5 percent by weight; and (2) (a) isomers of carboxybenzaldehyde (CBA) in an amount ranging from 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm, or varying from 1 ppm to 125 ppm; or (b) isomers of toluic acid (TA) in an amount ranging from 1 ppm to 1000 ppm, or varying from 1 ppm to 500 ppm, or varying from 1 ppm to 250 ppm, or varying from 1 ppm at 125 ppm; or (c) both of the following: I (1) carboxybenzaldehyde isomers (CBA) in an amount ranging from 1 ppm to 1000 ppm, or varying from 1 ppm to 50Oj ppm, or varying from 1 ppm to 250 ppm or varying from 1 ppm to 125 ppm; \ (2) isomers of toluic acid (TA) in an amount ranging from 1 ppm to 500 ppm, or varying from 1 ppm to 250 ppm, or! it varies from 1 ppm to 125 ppm; where a total concentration of - CBA and TA varies from 1 ppm to 2000 ppm, 1 ppm to 1000 ppm, p ppm to 500 ppm, or 1 ppm to 250 ppm, or 1 ppm which would range from 150 ppm to 500 ppm, or ranging from 50 ppm, or 75 ppm, b 100 ppm, or 150 ppm to 500 ppm, or 1000 ppm, or 2000 ppm, or 0.51% by weight, or 1% by weight , or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight, or varying from 500 ppm, or 1000 ppm to 2000 ppm , or 0.5% by weight or 1% in > weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight; (b) isomers of benzene tricarboxylic acid varying from 140 ppm to 1000 ppm, or varying from 175 ppm to 750 ppm, or varying from 200 ppm to 500 ppm, or varying from 150 ppm, or 175 ppm, b 200 ppm at 500 ppm, or 750 ppm, or 1000 ppm; VIII. In one embodiment of the invention, the dry carboxylic acid composition 280 comprises: (1) carboxylic acid in an amount greater than 50 percent by weight, or greater than 60 percent by weight, or greater than 70 percent by weight in weight, or greater than 80 percent by weight, or greater than 90 percent by weight, or greater than 95 percent by weight, or greater than 97 percent, or greater than 98 percent, or greater than 98.5 percent, or greater than 99 percent, or greater than 9.5 percent by weight; Y (2) (&) isomers of carboxybenzaldehyde (CBA) in an amount ranging from 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 from 1 ppm to 250 ppm, or varying from 1 ppm to of toluic acid (TA) in an amount that it varies from 1 ppm to 1000 ppm, or varying from 1 ppm to 500 ppm, or varying from 1 ppm to 250 ppm, or varying from 1 ppm to 125 ppm; or [(c) both of the following: i (1) carboxybenzaldehyde isomers (CBA) in a I cantiplad varying from 1 ppm to 1000 ppm, or varying from 1 ppm to 5001 ppm, or varying from 1 ppm to 250 ppm or varying from 1 ppm to 125 ppm; (2) isomers of toluic acid (TA) in an amount ranging from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm, or varying from 1 ppm to 125 ppm; Where the total concentration of CBA and TA varies from 1 ppm to 2000 ppm, 1 ppm to 1000 ppm, or from ppm to 500 ppm, or from 1 ppm to 250 ppm, or from 1 ppm to 125 ppm; and (3) from the following: (a) isophthalic acid in an amount less than 50 ppm, or ranging from 50 ppm to 2000 ppm, or varying from 75 ppm to 1500 ppm, or varying from 100 ppm to 1000 ppm, or varying from 150 ppm to! 500 ppm, or varying from 50 ppm, or r 75 ppm, or 100 ppm, or 150! ppm to 500 ppm, or 1000 ppm, or 2000 ppm, or 0.5% by weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight, or varying from 500 ppm, or 1000 ppm to 2000 ppm, or 0.5% by weight or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% in weigh; (b) dicarboxybiphenyl isomers in an amount ranging from 20 ppm to 150 ppm, or ranging from 25 ppm to 100 ppm, or ranging from 25 ppm to 75 ppm, or varying from 200 ppm, or 300 ppm, 500 ppm at 1000 ppm, or 2000 ppm, or 0.5% by weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight Weight, or 49% by weight; IX. In one embodiment of the invention, the dry carboxylic acid composition 280 comprises: (1) carboxylic acid in an amount greater than 50 percent by weight, or greater than 60 percent by weight, or greater than 70 percent by c | in weight, or greater than 80 percent by weight, or greater than 90 percent by weight, or greater than 95 percent by weight,! or greater than 97 percent, or greater than 98 percent, or greater than 98.5 percent, or greater than 99 percent, or greater than 9 | 9.5 percent by weight; and (2) (a) isomers of carboxybenzaldehyde (CBA) in an amount that would range from 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm, or varying from 1 ppm to 125 pjpm; or | (b) isomers of toluic acid (TA) in an amount that ppm at 1000 ppm, or 2000 ppm, or 0.5% by weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight; X. In one embodiment of the invention, the dry carboxylic acid composition 280 comprises: (1) carboxylic acid in an amount greater than 50 percent by weight, or greater than 60 percent by weight, or greater than 70 percent in weight, or greater than 80 percent by weight, or greater than 90 percent by weight, or greater than 95 percent by weight, 1 or greater than 97 percent, or greater than 98 percent, or greater than 98.5 percent , or greater than 99 percent, or greater than 99.5 percent by weight; and (2) (p) isomers of carboxybenzaldehyde (CBA) in an amount ranging from 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 ppm, which varies from 1 ppm to 250 ppm, or which varies from 1 ppm at 125 ppm; or! (b) isomers of toluic acid (TA) in an amount ranging from 1 ppm to 1000 ppm, or varying from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm, or varying from 1 ppm at 125 ppm; (C) both of the following:: (1) carboxybenzaldehyde isomers (CBA) in an amount ranging from 1 ppm to 1000 ppm, or varying from 1 ppm to 500j ppm, or ranging from 1 ppm to 250 ppm or that varies from 1 ! (2) isomers of toluic acid (TA) in an amount ranging from 1 ppm to 500 ppm, or ranging from 1 ppm 'to 250 ppm, or ranging from 1 ppm to 125 ppm; wherein the total concentration of CBA and TA varies from 1 bpm to 2000 ppm, 1 ppm to 1000 ppm, or from 1 ppm to 500 ppm, or from 1 ppm to 250 ppm, or from 1 ppm to 125 ppm; and (3) at least two, or all of the following: j (a) terephthalic acid in an amount of at least 50 ppm, p ranging from 50 ppm to 2000 ppm, or varying from 75 ppm or 1500 ppm , or varying from 100 ppm to 1000 ppm, or varying from 150 ppm to 500 ppm, or varying from 50 ppm, or 75 ppm, or 100 ppm, or 150 ppm to 500 ppm, or 1000 ppm, or 2000 ppm , or 0.5% by weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10%. by weight, or 25% by weight, or 49% by weight, or varying from 500 ppm, or 1000 ppm at 2000 ppm, or 0.5% by weight or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight weight, or 49% by weight; (b) isomers of benzene tricarboxylic acid varying from 140 ppm to 1000 ppm, or varying from 175 ppm to 750 ppm, or varying from 200 ppm to 500 ppm, or varying from 150 ppm, or 175 ppm, < 200 ppm at 500 ppm, or 750 ppm, or 1000 ppm; (c) isomers of dicarboxybiphenyl in an amount ranging from 20 ppm to 150 ppm, or varying from 25 ppm to 100 ppm, or ranging from 25 ppm to 75 ppm, or varying from 200 ppm, or 300 ppm, p 500 ppm at 1000 ppm, or 2000 ppm, or 0.5% by weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight weight, or 49% by weight; XI. In one embodiment of the invention, the acid composition Dry carbohydrate 280 comprises: (1) carboxylic acid in an amount greater than 50 percent by weight, or greater than 60 percent by weight, or greater than 70 percent by weight, or greater than 80 percent by weight, or greater than 90 percent by weight, or greater than 95 percent by weight, or greater than 97 percent, or greater than 98 percent, or greater than 98.5 percent, or greater than 99 percent, or greater than 93.5 percent by weight; and (2) (a) carboxybenzaldehyde isomers (CBA) in an amount ranging from 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 ppm, which varies from 1 ppm to 250 ppm, or which varies from 1 ppm to 125 ppm; or (b) isomers of toluic acid (TA) in an amount ranging from 1 ppm to 1000 ppm, or varying from 1 ppm to 500 ppm, or varying from 1 ppm to 250 ppm, or varying from 1 ppm at 125 ppm; or (c) both of the following: (1) carboxybenzaldehyde isomers (CBA) in a cantipad ranging from 1 ppm to 1000 ppm, or varying from 1 ppm to 500 ppm, or varying from 1 ppm to 250 ppm or ranging from 1 ppm to 125 ppm; I (2) isomers of toluic acid (TA) in an amount ranging from 1 ppm to 500 ppm, or varying from 1 ppm to 250 ppm, I o that varies from 1 ppm to 125 ppm; i 'where the total concentration of CBA and TA varies from 1 ppm to 2000 ppm, 1 ppm to 1000 ppm, or from 1 ppm to 500 ppm, or from 1 ppm to 250 ppm, or from 1 ppm to 125 ppm; and (3) both of the following: (a) terephthalic acid in an amount of at least 50 ppm, or varying from 50 ppm to 2000 ppm, or varying from 75 ppm to 1500 ppm, or varying from 100 ppm at 1000 ppm, or varying from 150 ppm to 500 ppm, or varying from 50 ppm, or 75 ppm, or 100 ppm, D 150 ppm to 500 ppm, or 1000 ppm, or 2000 ppm, or 0.5% by weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight, or varying from 500 ppm, or 1000 ppm at 2000 ppm, or 0.5% or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, I or 49% by weight; (b) isomers of benzene tricarboxylic acid varying from | 140 ppm to 1000 ppm, or varying from 175 ppm to 750 ppm, or varying from 200 ppm to 500 ppm, or varying from 150 ppm, or 175 I ppm, 6 200 ppm at 500 ppm, or 750 ppm, or 1000 ppm; XII. In one embodiment of the invention, the dry carboxylic acid composition 280 comprises: (1) carboxylic acid in an amount greater than 50 percent I in pejso, or greater than 60 percent by weight, or greater than 70 by weight, or greater than 80 percent by weight, or greater than 90 percent by weight, or greater than 95 percent by weight, Or greater than 97 percent, or greater than 98 percent, or greater! that 98.5 percent, or greater than 99 percent, or greater that 99.5 percent by weight; and (2) () isomers of carboxybenzaldehyde (CBA) in an amount ranging from 1 ppm to 1000 ppm, or varying from 1 ppm to 500 ppm, or varying from 1 ppm to 250 ppm, or varying from 1 ppm at 125 ppm; or (b) isomers of toluic acid (TA) in an amount ranging from 1 ppm to 1000 ppm, or varying from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm, or varying from 1 ppm at 125 ppm; io (c) both of the following: i (1) carboxybenzaldehyde isomers (CBA) in an amount ranging from 1 ppm to 1000 ppm, or varying from 1 ppm to 500 'ppm, or varying from 1 ppm to 250 ppm or varying from 1 ppm to 125 ppm; (2) isomers of toluic acid (TA) in an amount ranging from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm, or a change of 1 ppm to 125 ppm; 'where the total concentration of CBA and TA varies from CBA and TA varies from 1 ppm to 2000 ppm, 1 ppm to 1000 ppm, or from 1 ppm: to 500 ppm, or from 1 ppm to 250 ppm, or 1 ppm at 125 ppm; and (3) the following: (a) terephthalic acid in an amount of at least 50 ppm, b varying from 50 ppm to 2000 ppm, or varying from 75 ppm to 1500 ppm, or varying from 100 ppm ppm to 1000 ppm, or that varies from 150 ppm at 500 ppm, or varying from 50 ppm, or 75 ppm, or 100 ppm, or 150 ppm to 500 ppm, or 1000 ppm, or 2000 ppm, or 0.5% in or 1% by weight, or 2% in weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight, or varying from 500 pm, or 1000 ppm at 2000 ppm, -or 0.5% by weight or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight : weight, or 49% by weight; (b) isomers of dicarboxybiphenyl in an amount ranging from 20 ppm to 150 ppm, or varying from 25 ppm to 100 ppm, or varying from 25 ppm to 75 ppm, or varying from 200 ppm, or 300 ppm, or 500 ppm at 1000 ppm, or 2000 ppm, or 0.5% by weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight weight, or 49% by weight; XIII. In another embodiment of the invention, the dry carboxylic acid composition 280 comprises: (1) carboxylic acid in an amount greater than 50 percent by weight, or greater than 60 percent by weight, or greater than 70 percent by weight, or greater than 80 weight percent, or greater; 90 percent by weight, or greater than 95 percent by weight, or greater than 97 percent, or greater than 98 percent, or greater than 98.5 percent, or greater than 99 percent, or greater than 9 | 9.5 percent by weight; and I (2) ijsomers of carboxybenzaldehyde (CBA) in an amount ranging from 1 ppm to 500 ppm, and i (3) all of the following: (a) isotonic acid isomers in an amount of at least 50 ppm, or varying from 50 ppm to 2000 ppm, or varying from 75 l ppm to 1500 ppm, or varying from 100 ppm to 1000 ppm, or it varies from 150 ppm to 500 ppm, or it varies from 50 ppm, or 75 ppm, or 100 ppm, or 150 ppm to 500 ppm, or 1000 ppm, or 2000 ppm, or 0. 5% by weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 4% by weight, or v. 500 ppm, or 1000 ppm at 2000 ppm, or 0. 5% by weight or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 4% by weight; (B) isomers of benzene tricarboxylic acid varying from 140 pjpm to 1000 ppm, or varying from 175 ppm to 750 ppm, or varying! from 200 ppm to 500 ppm, or varying from 150 ppm, or 175 ppm, or 200 ppm to 500 ppm, or 750 ppm, or 1000 ppm; '(c) isomers of dicarboxybiphenyl in an amount ranging from 20 ppm to 150 ppm, or varying from 25 ppm to 100 ppm, or ranging from 25 ppm to 75 ppm, or varying from 200 ppm, or 300 ppm , io 500 ppm at 1000 ppm, or 2000 ppm, or 0. 5% by weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, j or 25% by weight, or 4% by weight; Isophthalic Acid Compounds I. According to one embodiment of the invention, the dry carboxylic acid composition 280 comprises: (1) isophthalic acid in an amount greater than 50 percent by weight, or greater than 60 percent by weight, or greater than 70 percent by weight, or greater than 80 percent by weight, or greater than 90 percent by weight, or greater than 95 percent by weight. weight, or greater than 97 percent, or greater than 98 percent, or greater than 98.5 percent, or greater than 99 percent, or greater than 99.5 percent by weight; and (2) a) 3-carboxybenzaldehyde (3-CBA) in an amount ranging from 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm, or varying from 1 ppm to 125 ppm; i (B) m-toluic acid (m-TA isomers) in an amount ranging from 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm, or varies from 1 ppm to it varies! from 1 ppm to 2000 ppm, 1 ppm to 1000 ppm, or from 1 ppm to 500 ppm, b from 1 ppm to 250 ppm, or from 1 ppm to 125 ppm and (3) at least one, or at least two , or at least three, or at least four, or at least five, or at least six, or at least seven, or at least eight, or at least nine, or at least ten, or at least eleven , or at least twelve, or at least thirteen, or at least I fourteen, or at least fifteen, or at least sixteen, say at least seventeen, or at least eighteen, or at least nineteen, or all of the following: (a) terephthalic acid in an amount of at least 50 ppm, or ranging from 50 ppm to 2000 ppm, or ranging from 75 ppm to 1500 ppm, or ranging from 100 ppm to 1000 ppm, or ranging from ii 150 ppm to 500 ppm; i '(b) phthalic acid in an amount of at least 20 ppm, or at least 50 ppm, or at least 100 ppm, or ranging from 20 ppm to 1000 ppm, or ranging from 50 ppm to 750 ppm , or quei varies from 100 ppm to 500 ppm; (c) benzene tricarboxylic acid isomers in an amount of at least 140 ppm, or ranging from 140 ppm to 1000 'ppm, or ranging from 175 ppm to 750 ppm, or ranging from 200 p | pm to 500 ppm; (d) benzoic acid in an amount of at least 50 ppm, or at least 75 ppm, or at least 100 ppm; or which varies from 50 ppm to 500 ppm, or. which varies from 75 ppm to 400 ppm, or which varies from 100 ppm to 300 ppm; '(e) 3-hydroxybenzoic acid in an amount of at least! 3 ppm, of at least 5 ppm, or at least 20 ppm, or I that goes from 3 ppm to 200 ppm, or that varies from 5 ppm to 175 ppm, I or quej varies from 20 ppm to 150 ppm; (f) 3-hydroxymethylbenzoic acid in an amount of at least 40 ppm, or at least 80 ppm, or at least 100 pom, or varying from 40 ppm to 200 ppm, or varying from 80 ppm to 180 ppm , or which varies from 100 ppm to 160 ppm; (g) 3,3 '-dicarboxybiphenyl isomers in an amount ranging from 20 ppm to 150 ppm, or varying from 25 ppm to 100 ppm, or varying from 25 ppm to 75 ppm; (h) isomers of dicarboxyranthraquinone in an amount of per Ib less than 1 ppm, or at least 0.5 ppm, or at least 0.4 ppm, or at least 0.35 ppm; (i) isomers of dicarboxyistilbene in an amount varying from greater than 7 ppm; or greater than 10 ppm; (j) isomers of tricarboxybiphenyl in an amount varying from 8 ppm to 100 ppm, or varying from 9 ppm to 50 ppm, or ranging from 10 ppm to 25 ppm; (k) isomers of tricarboxybenzophenone in an amount ranging from 5 ppm to 100 ppm, or varying from 6 ppm to 75 ppm, or varying from 7 ppm to 60 ppm; (1) dicarboxybenzophenone isomers in an amount varying: from 10 ppm to 150 ppm, or varying from 12 ppm to 100 ppm, or ranging from 15 ppm to 75 ppm; isomers of dicarboxybenzyl in an amount that varies from 1 ppm to 30 ppm, or that varies from 2 ppm to 20 ppm, or that it varies from 3 ppm to 10 ppm; (n) isomers of form-acet-hydroxybenzoic acid in an amount ranging from 1 ppm to .20 ppm, or ranging from 2 ppm to 15 ppm, or ranging from 3 ppm to 10 ppm; (o) isomers of acet-hydroxymethylbenzoic acid in an amount ranging from 1 ppm to 30 ppm, or varying from 2 ppm to pp: n, or varying from 3 ppm to 15 ppm; (p) a-bromo-m-toluic acid in an amount ranging from 1 ppm to 100 ppm, or ranging from 2 ppm to 50 ppm, or varying from 5 ppm to 25 ppm; | (q) bromo-benzoic acid in an amount that varies from 5 (4) at least one, or at least two, or at least three,! or at least four, or at least five or at least | seos, or at least seven, or all of the following: (a) terephthalic acid in an amount of at least 1 ppm, b varying from 1 ppm to 5000 ppm, or varying from 5 ppm to 2500 ppm, or varying from 10 ppm to 2000 ppm, or varying from 15 ppm to 1000 ppm, or varying from 20 ppm to 500 ppm ppm; (b) phthalic acid in an amount of at least 1 ppm, or ranging from 1 ppm to 3000 ppm, or ranging from 2 ppm to 2000 ppm, which varies from 3 ppm to 1000 ppm, or varying from 4 ppm to 1000 ppm; ppm at 500 p> m; 1 (c) benzene tricarboxylic acid isomers in an amount of at least 1 ppm, or ranging from 1 ppm to 3000 ppm, or ranging from 5 ppm to 2000 ppm, or varying from 10 ppm to 1000 j? pm, or varying from 20 ppm to 500 ppm; '(d) benzoic acid in an amount of at least 1 ppm, p ranging from 1 ppm to 3000 ppm, or varying from 5 ppm to 2000 ppm, or varying from 10 ppm to 1000 ppm, or varying from 20 ppm to 500 ppm; j (e) 3-hydroxybenzoic acid in an amount of at least! 1 ppm, or varying from 1 ppm to 500 ppm, or varying from 5 ppm to! 400 ppm, or varying from 10 ppm to 200 ppm; (f) 3-hydroxymethylbenzoic acid in an amount of at least 1 ppm, or ranging from 1 ppm to 500 ppm, or ranging from 5 ppm to 400 ppm, or ranging from 10 ppm to 200 ppm; i | (g) 3, 3 '-dicarboxybiphenyl in an amount of at least 1 ppm, or ranging from 1 ppm to 500 ppm, or varying from 5 ppm to 400 ppm, or varying from 10 ppm to 200 ppm; : (h) dicarboxyranthraquinone isomers in an amount of for lp less 0.1 ppm, or varying from 0.1 ppm to 5 ppm, or varying from 0.2 ppm to 4 ppm, or varying from 0.3 ppm to 3 ppm; 1 wherein the compound or compounds selected in (4) I are different than the compound or compounds selected in (3). II. In one embodiment of the invention, the dry carboxylic acid composition 280 comprises: (1) isophthalic acid in an amount greater than 50 percent by weight, or greater than 60 percent by weight, or greater than 70 percent by weight, or greater than 80 percent by weight, greater than 90 percent by weight, or greater than 95 percent by weight, greater than 97 percent, or greater than 98 percent, higher; that 98.5 percent, or greater than 99 percent, or greater than 9] 9.5 percent by weight; and I (2) (a) 3-carboxybenzaldehyde (3-CBA) in a varying amount! from 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm, or ranging from 1 ppm to 125 ppm; or (b) m-toluic acid (m-TA) in an amount ranging from 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm, or varying from 1 ppm to 125 ppm; or (c) both of the following: (1) 3-carboxybenzaldehyde (3-CBA) in an amount ranging from 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 ppm, or varying from 1 ppm at 250 ppm or ranging from 1 ppm to ppm, p that varies from 50 ppm to 2000 ppm, or that varies from 75 ppm I to 150) ppm, or ranging from 100 ppm to 1000 ppm, or ranging from 150 ppm to 500 ppm, or varying from 50 ppm, or 75 ppm, or 100 ppm, or 150 ppm to 500 ppm, or 1000 ppm, or 2000 ppm, or 0.5% by weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight, or % by weight, or varying from 500 p ^> m, or 1000 ppm at 2000 ppm, or 0.5% by weight or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight , or 49% by weight; (b) benzene tricarboxylic acid isomers ranging from 140 ppm to 1000 ppm, or ranging from 175 ppm to 750 ppm, or varying; from 200 ppm to 500 ppm, or ranging from 150 ppm, or 175 ppm, or 200 ppm to 500 ppm, or 750 ppm, or 1000 ppm; je) 3, 3 '-dicarboxibiphenyl in an amount that varies from ppm to 150 ppm, or varying from 25 ppm to 100 ppm, or ranging from 25 ppm to 75 ppm, or ranging from 200 ppm, or 300 ppm, or 500 ppm to 1000 ppm, or 2000 ppm, or 0.5 % by weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight; (d) phthalic acid in an amount of at least 20 ppm, or at least 50 ppm, or at least 100 ppm, or ranging from 20 ppm to 1000 ppm, or ranging from 50 ppm to 750 ppm, or ranging from 100 ppm to 500 ppm, or ranging from 20 ppm, 50 ppm, fL00 ppm to 500 ppm, or 750 ppm, or 1000 ppm, or 2000 ppm, or 0.5% by weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight, or varying! of 500 ppm, or 750 ppm, or 1000 ppm at 2000 ppm, or 0.5% by weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight; j (e) 3-hydroxybenzoic acid varying from 3 ppm to 200 ppm, p ranging from 5 ppm to 175 ppm, or ranging from 20 ppm to 150 pjxn, or varying from 3 ppm, or 5 ppm or 20 ppm at 150 ppm, or 175 ppm, or 200 ppm, or 500 ppm, or 1000 ppm; (f) 3-hydroxymethylbenzoic acid in an amount of at least 40 ppm, or at least 80 ppm, or at least 100 ppm, f ranging from 40 ppm to 200 ppm, or ranging from 80 ppm to 180 ppm , < b ranging from 100 ppm to 160 ppm, or ranging from 40 ppm, or 80 † »pm, or 100 ppm to 500 ppm, or 1000 ppm, or 2000 ppm, or 0.5% by weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight I weight, ? or 10% by weight, or 25% by weight, or 49% by weight; | (g) benzoic acid varying from 60 ppm to 500 ppm, or varying! from 75 ppm to 400 ppm, or ranging from 100 ppm to 300 ppm, or varying from 60 ppm, or 75 ppm, or 100 ppm to 300 ppm, or 500 ppm, p 1000 ppm. III. In one embodiment of the invention, the dry carboxylic acid composition 280 comprises: (1) isophthalic acid in an amount greater than 50 percent by weight, or greater than 60 percent by weight, or greater than 70 per weight by weight , or greater than 80 percent by weight, or greater than 90 percent by weight, or greater than 95 percent by weight, or greater than 97 percent, or greater than 98 percent, or greater than 98.5 percent, or greater than 99 percent, or greater than 90.5 percent by weight; and (2) (a) 3-carboxybenzaldehyde (3-CBA) in a varying amount; from 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 ppm, or varying from 1 ppm to 250 ppm, or varying from 1 ppm to 125 ppm; or (b) m-toluic acid (m-TA) in an amount that varies from 1 ppm; at 1000 ppm, or ranging from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm, or ranging from 1 ppm to 125 ppm; or (c) both of the following: (1) 3-carboxybenzaldehyde (3-CBA) in an amount ranging from 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm ppm or that varies from 1 ppm to 125 pjpm; (2) m-toluic acid (m-TA) in a varying amount! from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm, or varying from 1 ppm to 125 ppm; where the total concentration of 3-CBA and m-TA varies from 1 ppm to 2000 ppm, 1 ppm to 1000 ppm, or from 1 ppm to 500 ppm, or from 1 ppm to 250 ppm, or from 1 ppm to 125 ppm; and (3) at least two, or at least three, or at least four, or all of the following: i (a) terephthalic acid in an amount of at least | 50 ppm, or varying from 50 ppm to 2000 ppm, or varying I from 75 ppm to 1500 ppm, or varying from 100 ppm to 1000 ppm, or varying from 150 ppm to 500 ppm, or varying from 50 ppm, or 75 ppm, or 100 ppm, or 150 ppm to 500 ppm , or 1000 ppm, or 2000 ppm, or 0.5% by weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight , or 49% by weight, or ranging from 500 ppm, or 1000 ppm to 2000 ppm, or 0.5% by weight or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight; | (b) isomers of benzene tricarboxylic acid which varies from 140 ppm at 1000 ppm, or ranging from 175 ppm to 750 ppm, or ranging from 200 ppm to 500 ppm, or ranging from 150 ppm, or 175 ppm, or 200 ppm to 500 ppm, or 750 ppm, or 1000 ppm; j¡c) 3, 3 '-dicarboxybiphenyl in an amount ranging from 20 ppln to 150 ppm, or ranging from 25 ppm to 100 ppm, or it varies from 25 ppm to 75 ppm, or it varies from 200 ppm, or 300 ppm, or 500 ppm to 1000 ppm, or 2000 ppm, or 0.5% by weight, or 1% by weight, or 2% by weight, or 3 % by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight; (d) italic acid in an amount of at least 20 ppm, or at least 50 ppm, or at least 100 ppm, or ranging from 20 ppm to 1000 ppm, or ranging from 50 ppm to 750 ppm, or ranging from 100 ppm to 500 ppm, or ranging from 20 ppm, 50 ppm, LOO ppm to 500 ppm, or 750 ppm, or 1000 ppm, or 2000 ppm, or 0.5% by weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight, or varying from 500 ppm, or 750 ppm, or 1000 ppm at 2000 ppm, or 0.5% in i pe 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or weight, or 25% by weight, or 49% by weight; Benzoic acid that varies from 60 ppm to 500 ppm, or that varies from 75 ppm to 400 ppm, or ranges from 100 ppm to 300 ppm, or quej varies from 60 ppm, or 75 ppm, or 100 ppm to 300 ppm, or 500 ppm, < fc > 1000 ppm. IV. In one embodiment of the invention, the dry carboxylic acid composition 280 comprises: (1) isophthalic acid in an amount greater than 50 percent by weight, or greater than 60 percent by weight, or greater than 70 percent by weight, or greater than 80 percent by weight, or greater than 90 percent by weight, or greater than 95 percent by weight, or greater than 97 percent, or greater than 98 percent, or higher; that 98.5 percent, or greater than 99 percent, or greater than 9? 9.5 percent by weight; and (2) (a) 3-carboxybenzaldehyde (3-CBA) in a varying amount, from 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 ppm, or which ranges from 1 ppm to 250 ppm, or ranging from 1 ppm to 125 ppm; or (b) m-toluic acid (m-TA) in an amount ranging from 1 ppmj to 1000 ppm, or varying from 1 ppm to 500 ppm, or varying from 1 pm to 250 ppm, or varying from 1 ppm at 125 ppm; or (c) both of the following: (1) 3-carboxybenzaldehyde (3-CBA) in an amount ranging from 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm ppm or varying from 1 ppm to 125 pn; (2) m-toluic acid (m-TA) in an amount that varies: from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm, or ranging from 1 ppm to 125 ppm; where the total concentration of 3-CBA and m-TA CBA varies. from 1 ppm to 2000 ppm, 1 ppm to 1000 ppm, or from 1 ppm to 500 ppm, p from 1 ppm to 250 ppm, or from 1 ppm to 125 ppm; and (3) at least two, or at least three, or all of the following: (a) terephthalic acid in an amount of at least 50 ppm, ranging from 50 ppm to 2000 ppm, or varying from 75 ppm to 150Ü ppm, or varying from 100 ppm to 1000 ppm, or varying from 150 pjpm at 500 ppm, or varying from 50 ppm, or 75 ppm, or 100 ppm, or 150 ppm to 500 ppm, or 1000 ppm, or 2000 ppm, or 0.5% by weight,! or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight or at least 49% by weight, or that! it varies from 500 ppm, or 1000 ppm to 2000 ppm, or 0.5% by weight or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by pejso, or 25% by weight, or 49% by weight; i (b) isomers of benzene tricarboxylic acid varying from 140 pjpm to 1000 ppm, or varying from 175 ppm to 750 ppm, or varying from 200 ppm to 500 ppm, or varying from 150 ppm, or 175 ppm, or 200 ppm at 500 ppm, or 750 ppm, or 1000 ppm; 1 (c) 3, 3 '-dicarboxybiphenyl in an amount ranging from 20 ppm to 150 ppm, or ranging from 25 ppm to 100 ppm, or varying! from 25 ppm to 75 ppm, or varying from 200 ppm, or 300 ppm, or 500; ppm at 1000 ppm, or 2000 ppm, or 0.5% by weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight , or 49% by weight; (d) phthalic acid in an amount of at least 20 ppm, p at least 50 ppm, or at least 100 ppm, or ranging from 20 ppm to 1000 ppm, or ranging from 50 ppm to 750 ppm, or which varies from 100 ppm to 500 ppm, or which varies from 20 ppm, 50 ppm, j00 ppm to 500 ppm, or 750 ppm, or 1000 ppm, or 2000 ppm, or 0.5% n weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight, or varying from 500 ppm, or 750 ppm, or 1000 ppm to 2000 ppm, or 0.5% in 1 weight,! or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, 0 10% by weight, or 25% by weight, or 49% by weight; V. In one embodiment of the invention, the dry carboxylic acid composition 280 comprises: (1) isophthalic acid in an amount greater than 50 percent by weight, or greater than 60 percent by weight, or greater than 70 percent by weight in weight, or greater than 80 percent by weight, or greater! than 90 percent by weight, or greater than 95 percent by weight, or greater than 97 percent, or greater than 98 percent, or greater than 98.5 percent, or greater than 99 percent, or greater than 9 ^ .5 percent by weight; and (2) (a) 3-carboxybenzaldehyde (3-CBA) in an amount that I varial from 1 ppm to 1000 ppm, or varying from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm, or varying from 1 ppm to 125 ppm; or 'b) m-toluic acid (m-TA) in an amount that varies from 1 ppm to 1000 ppm, or varying from 1 ppm to 500 ppm, or varying from 1 ppm to 250 ppm, or ranging from 1 ppm to 125 ppm; or (c) i both! of the following: (1) 3-carboxybenzaldehyde (3-CBA) in an amount ranging from 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm or it varies from 1 ppm to 125 p] í > m; (2) m-toluic acid (m-TA) in an amount ranging from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm, or which varies from 1 ppm to 125 ppm; j where the total concentration of 3-CBA and m-TA i varies | from 1 ppm to 2000 ppm, 1 ppm to 1000 ppm, or from 1 ppm to 500 ppm, | D from 1 ppm to 250 ppm, or from 1 ppm to 125 ppm; and (3) at least two or all of the following: (a) terephthalic acid in an amount of at least 50 ppm, ranging from 50 ppm to 2000 ppm, or varying from 75 ppm to 1500 ppm, or varying from 100 ppm to 1000 ppm, or varying from 150 ppm to 500 ppm, or varying from 50 ppm, or 75 ppm, or 100 ppm, or 150 ppm to 500 ppm, or 1000 ppm, or 2000 ppm, or 0.5% by weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight, or varying from 500 p] bm, or 1000 ppm to 2000 ppm, or 0.5% by weight or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or I 25% eiji weight, or 49% by weight; (b) isomers of benzene tricarboxylic acid varying from 140 ppm to 1000 ppm, or varying from 175 ppm to 750 ppm, or varying from 200 ppm to 500 ppm, or varying from 150 ppm, or 175 ppm, or 200 ppm at 500 ppm, or 750 ppm, or 1000 ppm; (c) 3, 3 '-dicarboxibiphenyl in an amount ranging from 20 ppfr to 150 ppm, or ranging from 25 ppm to 100 ppm, or varying from 25 ppm to 75 ppm, or varying from 200 ppm, or 300 ppm, or 500 ppm at 1000 ppm, or 2000 ppm, or 0.5% by weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight; I VI. In one embodiment of the invention, the dry carbokilic acid composition 280 comprises: (1) isophthalic acid in an amount greater than 50 percent by weight, or greater than 60 percent by weight, or greater than 70 per weight by weight, or greater than 80 percent by weight, or greater than 90 percent by weight, or greater than 95 percent by weight I weight, j or greater than 97 percent, or greater than 98 percent, or greater than 98.5 percent, or greater than 99 percent, or greater than 99 · 5 percent by weight; and (2) (a) 3-carboxybenzaldehyde (3-CBA) in an amount that I vary! from 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 ppm, or varying from 1 ppm to 250 ppm, or varying from 1 ppm to 125 ppm; or (b) m-toluic acid (m-TA) in an amount that varies from 1 ppm | at 1000 ppm, or ranging from 1 ppm to 500 ppm, or varying from 1] pm to 250 ppm, or varying from 1 ppm to 125 ppm; or both of the following: (1) 3-carboxybenzaldehyde (3-CBA) in an amount ranging from 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 ppm I ppm, b varying from 1 ppm to 250 ppm or varying from 1 ppm to 125 ppm; (2) m-toluic acid (m-TA) in an amount ranging from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm, or ranging from 1 ppm to 125 ppm; where the total concentration of 3-CBA and m-TA varies from 1 ppm to 2000 ppm, 1 ppm to 1000 ppm, ppm to 500 ppm, or from 1 ppm to 250 ppm, or from 1 ppm to 125 ppm; And (3) in addition to the following: (a) terephthalic acid in an amount of at least 50 ppm, which varies from 50 ppm to 2000 ppm, or which varies from 75 ppm to 150 ppm, or which varies from 100 ppm to 1000 ppm, or ranging from 150 pjpm to 500 ppm, or varying from 50 ppm, or 75 ppm, or 100 ppm, b 150 ppm to 500 ppm, or 1000 ppm, or 2000 ppm, or 0. 5% in weight, 1% in weight, or 2% in weight, or 3% in weight, or 5% in weight, or 10% in weight, or 25% in weight or at least 4% by weight, or by 500 ppm, or 1000 ppm at 2000 ppm, or 0. 5% by weight or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by pefeo, or 25% by weight, or 49% by weight; (b) isomers of benzene tricarboxylic acid varying from 140 ppm to 1000 ppm, or varying from 175 ppm to 750 ppm, or varying from 200 ppm to 500 ppm, or varying from 150 ppm, or 175 ppm, > 200 ppm at 500 ppm, or 750 ppm, or 1000 ppm; VII. ??? In one embodiment of the invention, the dry carboxylic acid composition 280 comprises: (1) á < isophthalic acid in an amount greater than 50 percent by weight, or greater than 60 percent by weight, or greater than 70 percent by weight, or greater than 80 percent by weight, or greater than 90 percent by weight, or greater that 95 percent by weight,? greater than 97 percent, or greater than 98 percent, or greater than 98. 5 percent, or greater than 99 percent, or greater I that 99.5 percent by weight; and (2) (a) 3-carboxybenzaldehyde (3-CBA) in a varying amount; from 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm, or ranging from 1 ppm to 125 ppm; OR (b) m-toluic acid (m-TA) in an amount ranging from 1 ppm to 1000 ppm, or varying from 1 ppm to 500 ppm, or varying from 1 jppm to 250 ppm, or varying from 1 ppm at 125 ppm; or (c) both of the following: | (1) 3-carboxybenzaldehyde (3-CBA) in an amount that varies from 1 ppm to 1000 ppm, or that varies from 1 ppm to 500 ppm, or that varies from 1 ppm at 250 ppm or ranging from 1 ppm to 125 ppm; (2) m-toluic acid (m-TA) in an amount ranging from 1 ppm to 250 ppm, or varying wherein the total concentration of 3-CBA and m-TA varies I from 1 ppm to 2000 ppm, 1 ppm to 1000 ppm, or from 1 ppm to 500 ppm, † > from 1 ppm to 250 ppm, or from 1 ppm to 125 ppm; and (3) attachments of the following: i (a) terephthalic acid in an amount of at least 50 ppm, b ranging from 50 ppm to 2000 ppm, or ranging from 75 ppm to 150 ppm, or varying from 100 ppm at 1000 ppm, or ranging from 150 pjpm to 500 ppm, or ranging from 50 ppm, or 75 ppm, or 100 ppm, 6 150 ppm to 500 ppm, or 1000 ppm, or 2000 ppm, or 0.5% by weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight, or varying from 500 p (pm, or 1000 ppm at 2000 ppm, or 0.5% by weight or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or % by weight, or 49% by weight; I (b) 3, 3 '-dicarboxybiphenyl in a varying amount of ppm to 150 ppm, or varying from 25 ppm to 100 ppm, or varying from 25 ppm to 75 ppm, or varying from 200 ppm, or 300 ppm, or 500 ppm to 1000 ppm, or 2000 ppm, or 0.5 % by weight, or 1% by weight, or 21 by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight; VIII. In one embodiment of the invention, the dry carboxylic acid composition 280 comprises: (1) isophthalic acid in an amount greater than 50 percent by weight, or greater than 60 percent by weight, or greater than 70 percent by weight in weight, or greater than 80 percent by weight, or greater than 90 percent by weight, or greater than 95 percent in weight, greater than 97 percent, or greater than 98 percent, or greater than 98.5 percent, or greater than 99 percent, or greater than 9¾.5 percent by weight; and (2) (a) 3-carboxybenzaldehyde (3-CBA) in an amount varying from 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm, or ranging from 1 ppm to 125 ppm; or (b) m-toluic acid (m-TA) in an amount that varies from 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 ppm, or varying from 1 ppm to 250 ppm, or ranging from 1 ppm to 125 ppm; or (c) both of the following: do (3-CBA) in an amount or ranging from 1 ppm to 500 ppm or ranging from 1 ppm to (2) m-toluic acid (m-TA) in an amount ranging from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm, or ranging from 1 ppm to 125 ppm; where the total concentration of 3-CBA and m-TA i varies from 1 ppm to 2000 ppm, 1 ppm to 1000 ppm, or from 1 ppm to 500 ppm, b from 1 ppm to 250 ppm, or from 1 ppm to 125 ppm; and (3) aijnbos of the following: j (a) benzene-tricarboxylic acid isomers ranging from 140 ppm to 1000 ppm, or varying from 175 ppm to 750 ppm, or i varying from 200 ppm to 500 ppm, or which varies from 150 ppm, or 175 ppm, or 200 ppm to 500 ppm, or 750 ppm, or 1000 ppm; ! < b) 3, 3 '-dicarboxybiphenyl in an amount ranging from 20 ppm to 150 ppm, or ranging from 25 ppm to 100 ppm, or varying, from 25 ppm to 75 ppm, or varying from 200 ppm, or 300 ppm, or 500! ppm at 1000 ppm, or 2000 ppm, or 0.5% by weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight , or 49% by weight; j IX. In another embodiment of the invention, the acid composition! Dry carboxylic 280 comprises: I (1) isophthalic acid in an amount greater than 50 weight percent, or greater than 60 weight percent, or greater than 70 weight percent, or greater than 80 weight percent, or greater than 90 percent by weight, or greater than 95 percent by weight, or greater than 97 percent, or greater than 98 percent, or greater than 98.5 percent, or greater than 99 percent, or greater than 90.5 percent by weight; and (3-CBA) in a varying amount (3) tbdo of the following: (a) terephthalic acid in an amount of at least 50 ppm, or varying from 50 ppm to 2000 ppm, or varying from 75 ppm to 1500 ppm, or varying from 100 ppm to 1000 ppm, or varying from 150 ppm to 500 ppm, or varying from 50 ppm, or 75 ppm, or 100 ppm, or 150 ppm to 500 ppm, or 1000 ppm, or 2000 ppm, or 0.5% by weight, jo 1 % by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight, or varying from 500 ppm, or 1000 ppm to 2000 ppm, or 0.5% by weight or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight weight; b) isomers of benzene tricarboxylic acid varying from 140 ppm. at 1000 ppm, or ranging from 175 ppm to 750 ppm, or ranging from 200 ppm to 500 ppm, or varying from 150 ppm, or 175 ppm, f > 200 ppm at 500 ppm, or 750 ppm, or 1000 ppm; (ic) 3, 3 '-dicarboxibiphenyl in an amount which varies from pjjim at 150 ppm, or varying from 25 ppm to 100 ppm, or varying from 25 ppm to 75 ppm, or varying from 200 ppm, or 300 ppm, or 50C ppm to 1000 ppm, or 2000 ppm, or 0.5 % by weight, or 1% by weight ,; or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, 'or 25% by weight, or 49% by weight; Compositions of Terephthalic Acid I. In one embodiment of the invention, the dry carboxylic acid composition 280 comprises: terephthalic acid in an amount greater than 50 percent I in pejso, or greater than 60 percent by weight, or greater than 70 by weight, or greater than 80 percent by weight, or greater (than 90 percent by weight, or greater than 95 percent by weight, greater than 97 percent, or greater than 98 percent, or greater than 98.5 percent, or greater than 99 percent, or greater than 99.5 percent by weight, and (2) (ja) 4-carboxybenzaldehyde (4- CBA) in an amount that varies: from 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 ppm, or varying from 1 ppm to 250 ppm, or varying from 1 ppm to 125 ppm; 0 j (b) p-toluic acid (p-TA) in an amount ranging from i 1 ppm to 1000 ppm, or varying from 1 ppm to 500 ppm, or varying from 1 ppm to 250 ppm, or varying from 1 ppm to 125 ppm; or (c) both of the following: j (1) 4-carboxybenzaldehyde (4-CBA) in an amount ranging from 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 ppm (a) isophthalic acid in an amount of at least 50 ppm, ranging from 50 ppm to 2000 ppm, or ranging from 75 ppm to 1500 ppm, or ranging from 100 ppm to 1000 ppm, or varying from 150 ppm at 500 ppm jb) phthalic acid in an amount of at least 20 ppm, p at least 50 ppm, or at least 100 ppm, or ranging from 20 ppm to 1000 ppm, or ranging from 50 ppm to 750 ppm ppm, or that varies from 100 ppm to 500 ppm; (c) trimellitic acid in an amount of at least 140 p.m., or ranging from 140 ppm to 1000 ppm, or ranging from 175 ppm to 750 ppm, or ranging from 200 ppm to 500 ppm; (d) benzoic acid in an amount of at least 50 ppm, at least 75 ppm, or at least 100 ppm; or varying from 50 ppm to 500 ppm, or varying from 75 ppm to 400 ppm, or varying from 100 ppm to 300 ppm; j (e) 4-hydroxybenzoic acid in an amount of at least! 3 ppm, at least 5 ppm, or at least 20 ppm, or ranging from 3 ppm to 200 ppm, or varying from 5 ppm to 175 ppm, or varying from 20 ppm to 150 ppm; | (f) 4-hydroxymethyl benzoic acid in an amount of at least 40 ppm, or at least 80 ppm, or at least 100 ppm, p ranging from 40 ppm to 200 ppm, or varying from 80 ppm to 180, < which varies from 100 ppm to 160 ppm; j (g) 4, 4'-dicarboxybiphenyl in an amount ranging from 20 pppi to 150 ppm, or ranging from 25 ppm to 100 ppm, or varying from 25 ppm to 75 ppm; (h) 2,6-dicarboxyanthraquinone in an amount less than 1 ppm, or at least 0.5 ppm, or at least 0.4 ppm, or at least 0.35 ppm; (i) 4, '-dicarboxystilbene in an amount greater than 7 ppm; < † greater than 10 ppm; G) 2, 5, 1 -tricarboxybiphenyl in an amount ranging from 8 ppm to 100 ppm, or varying from 9 ppm to 50 ppm, or varying from ppj at 25 ppm; (K) 2, 5, 4 '-tricarboxibenzophenone in an amount ranging from 5 ppm to 100 ppm, or ranging from 6 ppm to 75 ppm, or ranging from 7 ppm to 60 ppm; (1), 4 '-dicarboxibenzophenone in an amount ranging from 10 ppm to 150 ppm, or ranging from 12 ppm to 100 ppm, or varying from 15 ppm to 75 ppm; (m) 4, 4 '-dicarboxybenzyl in an amount ranging from 1 ppm to 30 ppm, or ranging from 2 ppm to 20 ppm, or ranging from 3 ppm to 10 ppm; n) form-acet-hydroxy benzoic acid in a varying amount, from 1 ppm to 20 ppm, or ranging from 2 ppm to 15 ppm, or varying from 3 ppm to 10 ppm; (o) acet-hydroxymethyl benzoic acid in an amount ranging from 1 ppm to 30 ppm, or ranging from 2 ppm to 20 ppm, or varying from 3 ppm to 15 ppm; (p) a-bromo-p-toluic acid in an amount that varies from 1 ppm | at 100 ppm, or varying from 2 ppm to 50 ppm, or varying I from 5 jjjpm to 25 ppm; (b) bromo-benzoic acid in an amount ranging from 5 ppm to 50 ppm, or varying from 10 ppm to 40 ppm, or varying from pprtfi at 35 ppm; (jr) bromo-acetic acid in an amount ranging from 1 ppm to | 10 ppm; (| s) p-tolualdehyde in an amount varying from 7 ppm to i (B) phthalic acid in an amount of at least 1 ppm, [c) trimellitic acid in an amount of at least 1 ppm, or ranging from 1 ppm to 3000 ppm, or ranging from 5 ppm to 2000 ppm, or ranging from 10 ppm to 1000 ppm, or varying from 20 ppm to 1000 ppm; ppm at 500 ppm; i ^ d) benzoic acid in an amount of at least 1 ppm, or varying from 1 ppm to 3000 ppm, or varying from 5 ppm to 2000 ppm, or varying from 10 ppm to 1000 ppm, or varying from 20 ppm at 500 ppm; (je) 4-hydroxybenzoic acid in an amount of less than 1 ppm, or ranging from 1 ppm to 500 ppm, or ranging from 5 ppm to | 400 ppm, or ranging from 10 ppm to 200 ppm; (f) 4-hydroxymethyl benzoic acid in an amount of at least 1 ppm, or ranging from 1 ppm to 500 ppm, or ranging from 5 ppm to 400 ppm, or ranging from 10 ppm to 200 ppm; (g) 4, 4 '-carboxybiphenyl in an amount of at least 1 ppm, or ranging from 1 ppm to 500 ppm, or ranging from 5 ppm to 400 ppm, or ranging from 10 ppm to 200 ppm; (h) 2, 6-dicarboxyanthraquinone in an amount of at least 0.1 ppm, or ranging from 0.1 ppm to 5 ppm, - or varying from 0. 2 ppm to 4 ppm, or ranging from 0.3 ppm to 3 ppm; wherein the compound or compounds selected in (4) are different from the compound or compounds selected in (3). II. In one embodiment of the invention, the dry carboxylic acid composition 280 comprises: (1) terephthalic acid in an amount greater than 50 percent by weight, or greater than 60 percent by weight, or greater than 70 percent by weight in weight, or greater than 80 percent by weight, or greater than 90 percent by weight, or greater than 95 percent by weight, or greater than 97 percent, or greater than 98 percent, or greater than 98.5 percent, or greater than 99 percent, or greater than 99.5 percent by weight; and (2) (a) 4-carboxybenzaldehyde (4-CBA) in an amount ranging from 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm, or it varies from 1 ppm to 125 ppm; (b) p-toluic acid (p-TA) in an amount ranging from 1 ppmj to 1000 ppm, or varying from 1 ppm to 500 ppm, or varying from 1 ppm to 250 ppm, or varying from 1 ppm at 125 ppm; or (c) both1 of the following: (1) -carboxybenzaldehyde (4-CBA) in an amount ranging from 1 jppm to 1000 ppm, or varying from 1 ppm to 500 ppm, or varying from 1 ppm to 250 ppm or ranging from 1 ppm to 125 ppm; (2) p-toluic acid (p-TA) in an amount ranging from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm, or ranging from 1 ppm to 125 ppm; where the total concentration of 4-CBA and p-TA ranges from 1 ppm to 2000 ppm, 1 ppm to 1000 ppm, or 1 ppm to I 500 ppm, or from 1 ppm to 250 ppm, or from 1 ppm to 125 ppm; and (3) at least two, or at least three, or at least four, or at least five, or at least six, or all of the following: (a) isophthalic acid in an amount per at least 50 ppm, ø varying from 50 ppm to 2000 ppm, or varying from 75 ppm to 150 000 ppm, or varying from 100 ppm to 1000 ppm, or varying from 150 ppm to 500 ppm, or varying from 50 ppm ppm, or 75 ppm, or 100 ppm, 150 ppm at 500 ppm, or 1000 ppm, or 2000 ppm, or 0.5% by weight,! or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight, or varying from 500 ppm, or 1000 ppm to 2000 ppm, or 0.5% by weight or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or I % by weight, or 49% by weight; (b) trimellitic acid varying from 140 ppm to 1000 ppm, or varying from 175 ppm to 750 ppm, or ranging from 200 ppm to 500 ppm, varying from 150 ppm, or 175 ppm, or 200 ppm to 500 ppm, or 750 | ppm, or 1000 ppm; i (c) 4, 41 -dicarboxybiphenyl in an amount ranging from 20 ppm to 150 ppm, or ranging from 25 ppm to 100 ppm, or ranging from 25 ppm to 75 ppm, or varying from 200 ppm, or 300 ppm, or 500 ppm to 1000 ppm, or 2000 ppm, or 0.5% by weight, or 1% by weight,! or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, I or 25% by weight, or 49% by weight; (d) phthalic acid in an amount of at least 20 ppm, or at least 50 ppm, or at least 100 ppm, or ranging from 20 ppm to 1000 ppm, or ranging from 50 ppm to 750 ppm, or what | ranges from 100 ppm to 500 ppm, or ranging from 20 ppm, 50 ppm, 100 ppm to 500 ppm, or 750 ppm, or 1000 ppm, or 2000 ppm, or 0.5% by weight, or 1% by weight, or 2 % by weight, or 3% by weight, or 5% in pefinate, or 10% by weight, or 25% by weight, or 49% by weight, or varying from 500 ppm, or -750 ppm, or 1000 ppm to 2000 ppm, or 0.5% by weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight; (e) 4-hydroxy benzoic acid which ranges from 3 ppm to 200 ppm, or which ranges from 5 ppm to 175 ppm, or which varies from 20 ppm to 150 ppm, ü > ranging from 3 ppm, or 5 ppm or 20 ppm to 150 ppm, or 175 ppm, or 200 ppm, or 500 ppm, or 1000 ppm; 99 percent, or greater than 99.5 percent by weight; and (2) (ja) 4-carboxybenzaldehyde (4-CBA) in an amount ranging from 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm, or which varies from 1 ppm to 125 ppm; or (b) p-toluic acid (p-TA) in a varying amount of I 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm, or ranging from 1 ppm to 125 ppm; or (c) both of the following: ppm; and (3) at least two, or at least three, or at least four, or all of the following: i | (a) isophthalic acid in an amount of at least 50 ppm, p ranging from 50 ppm to 2000 ppm, or ranging from 75 ppm to 1500 ppm, or ranging from 100 ppm to 1000 ppm, or ranging from 150 ppm to 500 ppm, or varying from 50 ppm, to 75 ppm, or 100 ppm, 150 ppm at 500 ppm, or 1000 ppm, or 2000 ppm, or 0.5% by weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% | by weight, or 25% by weight, or 49% by weight, or ranging from 500 pbm, or 1000 ppm to 2000 ppm, or 0.5% by weight or 1% by weight, or 2% by weight, or 3% by weight weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight; e) benzoic acid that varies from 60 ppm to 500 ppm, or that varies from 75 ppm to 400 ppm, or that varies from 100 ppm to 300 ppm, or that | it varies from 60 ppm, or 75 ppm, or 100 ppm to 300 ppm, or 500 ppm, or 1000 ppm. IV. In one embodiment of the invention, the acid composition Dry carbkoxy 280 comprises: (1) terephthalic acid in an amount greater than 50 weight percent, or greater than 60 weight percent, or greater than 70 weight percent, or greater than 80 weight percent, or greater than 90 percent by weight, or greater than 95 percent by weight,) or greater than 97 percent, or greater than 98 percent, or greater than 98.5 percent, or greater than 99 percent, or greater than 9 | 9.5 percent by weight; Y ! I (2) jia) 4-carboxybenzaldehyde (4-CBA) in an amount ranging from 1 ppm to 1000 ppm, or varying from 1 ppm to 500 ppm, or varying from 1 ppm to 250 ppm, or it varies from 1 ppm to 125 ppm; or (b) p-toluic acid (p-TA) in an amount ranging from 1 ppm, to 1000 ppm, or ranging from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm, or varying from 1 ppm to 125 ppm; or (c) both of the following: (1) 4-carboxybenzaldehyde (4-CBA) in an amount ranging from 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm or that varies from 1 ppm to 125 Píj > m;; (2) p-toluic acid (? -TA) in an amount ranging from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm, or ranging from 1 ppm to 125 ppm; where the total concentration of 4-CBA and p-TA I it varies from 1 ppm to 2000 ppm, 1 ppm to 1000 ppm, or from 1 ppm to 500 ppm, | or from 1 ppm to 250 ppm, or from 1 ppm to 125 ppm; and i (3) at least two, or at least three, or all of the following: (a) isophthalic acid in an amount of at least 50 ppm, or ranging from 50 ppm to 2000 ppm, or varying from 75 ppm to 1500 ppm, or ranging from 100 ppm to 1000 ppm, or ranging from 150 ppm to 500 ppm, or ranging from 50 ppm, or 75 ppm, or 100 ppm, | or 150 ppm to 500 ppm, or 1000 ppm, or 2000 ppm, or 0.5% by weight, 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight, or that varies from 500 ppm, or 1000 ppm at 2000 ppm, or 0.5% by weight or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight. weight, or 49% by weight; (b) trimellitic acid varying from 140 ppm to 1000 ppm, or ranging from 175 ppm to 750 ppm, or ranging from 200 ppm to 500 ppm, or varying from 150 ppm, or 175 ppm, or 200 ppm to 500 ppm I or 750! ppm, or 1000 ppm; (C) 4, 41 -dicarboxybiphenyl in an amount ranging from ppm to 150 ppm, or that varies from 25 ppm to 100 ppm, or that varies from 25 ppm to 75 ppm, or that varies from 200 ppm, or 300 ppm, or 50? ppm to 1000 ppm, or 2000 ppm, or 0.5% by weight, or 1% in I weigh,! or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight; I (d) phthalic acid in an amount of at least 20 ppm, I or at least 50 ppm, or at least 100 ppm, or ranging from 20 ppm to 1000 ppm, or ranging from 50 ppm to 750 ppm, or ranging from 100 ppm to 500 ppm, or ranging from 20 ppm, 50 ppm, 100 ppm to 500 ppm, or 750 ppm, or 1000 ppm, or 2000 ppm, or 0. 5% by weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight, or by varia of 500 ppm, or 750 ppm, or 1000 ppm at 2000 ppm, or 0.5% by weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight by weight, or 25% by weight, or 49% by weight; V. In one embodiment of the invention, the dry carboxylic acid composition 280 comprises: (1) terephthalic acid in an amount greater than 50 percent by weight, or greater than 60 percent by weight, or greater than 70 percent by weight weight, or greater than 80 percent by weight, or greater than 90 percent by weight, or greater than 95 percent by weight,! or greater than 97 percent, or greater than 98 percent, or greater! that 98.5 percent, or greater than 99 percent, or greater than 99.5 percent by weight; yi (2) jia) 4-carboxybenzaldehyde (4-CBA) in an amount ranging from 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm, or it varies from 1 ppm to 125 ppm; I or i (b) p-toluic acid (p-TA) in an amount ranging from 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 ppm, or varying (3) at least two or all of the following: (a) isophthalic acid in an amount of at least 50 ppm, or varying from 50 ppm to 2000 ppm, or varying from 75 ppm to 15Q0 ppm, or it varies from 100 ppm to 1000 ppm, or it varies from 150 ppm to 500 ppm, or it varies from 50 ppm, or 75 ppm, or 100 ppm, or 150 ppm to 500 ppm, or 1000 ppm, or 2000 ppm, or 0.5 % in weigh,; or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight, or varying from 500 ppm, or 1000 ppm at 2000 ppm, or 0.5% by weight or 1% by weight, or 2% | by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight; (B) trimellitic acid varying from 140 ppm to 1000 ppm, or I it varies from 25 ppm to 75 ppm, or it varies from 200 ppm, or 300 ppm, or 500 ppm to 1000 ppm, or 2000 ppm, or 0.5% by weight, or 1% by weight, or 2% by weight, or 3 % by weight, or 5% by weight, or 10% by weight I weight, or 25% by weight, or 49% by weight; SAW. In one embodiment of the invention, the dry carboxylic acid composition 280 comprises: (1) terephthalic acid in an amount greater than 50 percent by weight, or greater than 60 percent by weight, or greater than 70 percent by weight, or greater than 80 percent by weight, or greater than 90 percent by weight, or greater than 95 percent by weight, or greater than 97 percent, or greater than 98 percent, or greater than 98.5 percent, or higher that 99 percent, or greater than 9.5 percent by weight; and (2) ja) 4-carboxybenzaldehyde (4-CBA) in an amount ranging from 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm, or varying from 1 ppm to 125 ppm; O; (b) p-toluic acid (p-TA) in an amount ranging from 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 ppm, or varying of 1 '. ppm at 250 ppm, or ranging from 1 ppm to 125 ppm; or i (c) both of the following:! (1) 4-carboxybenzaldehyde (4-CBA) in an amount that will range from 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm or varying from 1 ppm to 125 pjpm; i (2) p-toluic acid (p-TA) in an amount ranging from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm, or I that would range from 1 ppm to 125 ppm; where the total concentration of 4-CBA and p-TA ranges from 1 ppm to 2000 ppm, 1 ppm to 1000 ppm, or from 1 ppm to 500 ppm, or from 1 ppm to 250 ppm, or from 1 ppm to 125 ppm; and (3) both of the following: (a) isophthalic acid in an amount of at least 50 ppm, cj > that varies from 50 ppm to 2000 ppm, or that varies from 75 ppm to 1500 ppm, or that varies from 100 ppm to 1000 ppm, or that varies from 150 ppm to 500 ppm, or that varies from 50 ppm, or 75 ppm, or 100 ppm, cj 150 ppm to 500 ppm, or 1000 ppm, or 2000 ppm, or 0.5% by weight, or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% weight, or 25% by weight, or 49% by weight, or ranging from 500 ppm, or 1000 ppm to 2000 ppm, or 0.5% by weight or 1% by weight, or 2% by weight, or 3% by weight, or % by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight; (b) trimellitic acid varying from 140 ppm to 1000 ppm, or varying from 175 ppm to 750 ppm, or ranging from 200 ppm to 500 ppm I ppm, which varies from 150 ppm, or 175 ppm, or 200 ppm to 500 ppm, 0 750 ppm, or 1000 ppm; VII. In one embodiment of the invention, the dry carboxylic acid composition 280 comprises: i (1) terephthalic acid in an amount greater than 50 percent by weight, or greater than 60 percent by weight, or greater than 70 percent by weight , or greater than 80 percent by weight, or greater than 90 percent by weight, or greater than 95 percent by weight,! or greater than 97 percent, or greater than 98 percent, or greater than 98.5 percent, or greater than 99 percent, or greater than 99.5 percent by weight; and (2) (a) 4-carboxybenzaldehyde (4-CBA) in an amount ranging from 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm, or varying from 1 ppm to 125 ppm; or I | (b) p-toluic acid (p-TA) in an amount that varies from 1 ppmj to 1000 ppm, or ranging from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm, or ranging from 1 ppm to 125 ppm; or (c) both of the following: (1) 4-carboxybenzaldehyde (4-CBA) in an amount ranging from 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 ppm, | or ranging from 1 ppm to 250 ppm or ranging from 1 ppm to 125 ppm; (2) p-toluic acid (p-TA) in an amount that it varies! from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm, or that v. 1 ppm to 125 ppm; where the total concentration of 4-CBA and p-TA varied from 1 ppm to 2000 ppm, 1 ppm to 1000 ppm, or from 1 ppm to 500 ppm, from 1 ppm to 250 ppm, or from 1 ppm to 125 ppm; and (3) both of the following: j (a) isophthalic acid in an amount of at least 50 ppm, | or varying from 50 ppm to 2000 ppm, or varying from 75 ppm to 1500 ppm, or varying from 100 ppm to 1000 ppm, or that varies from 150 ppm to 500 ppm, or varying from 50 ppm, or 75 ppm, or 100 ppm, or 150 ppm to 500 ppm, or 1000 ppm, or 2000 ppm, or 0.5% by weight, 1 or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10%! by weight, or 25% by weight, or 49% by weight, or varying from 500 ppm, or 1000 ppm to 2000 ppm, or 0.5% by weight or 1% by weight, or 2% by weight, or 3% by weight weight, or 5% by weight, or 10% by weight, or % by weight, or 49% by weight; (b) 4,4 '-dicarboxybiphenyl in a varying amount of ppm to 150 ppm, or varying from 25 ppm to 100 ppm, or varying from 25 ppm to 75 ppm, or ranging from 200 ppm, or 300 ppm, or 500 ppm to 1000 ppm, or 2000 ppm, or 0.5 % by weight, or 1% by weight,! or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight; VIII. In one embodiment of the invention, the dry carboxylic acid composition 280 comprises: (1) terephthalic acid in an amount greater than 50 percent by weight, or greater than 60 percent by weight, or greater than 70 percent by weight, or greater than 80 percent by weight, or greater than 90 percent by weight, or greater than 95 percent by weight, or greater than 97 percent, or greater than 98 percent, or greater than 98.5 percent, or greater than 99 percent, or greater than 9.9 percent by weight; and (2) (a) 4-carboxybenzaldehyde (4-CBA) in an amount ranging from 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm, or varying from 1 ppm to 125 ppm; i or (b) p-toluic acid (p-TA) in an amount ranging from 1 ppm to 1000 ppm, or ranging from 1 ppm to 500 ppm, or varying I from 1 ppm to 250 ppm, or ranging from 1 ppm to 125 ppm; or (c) both of the following: (1) 4 -carboxybenzaldehyde (4-CBA) in an amount that varies from 1 ppm to 1000 ppm, or that varies from 1 ppm to 500 ppm, ranging from 1 ppm to 250 ppm or ranging from 1 ppm to 125 ppm; (2) p-toluic acid (p-TA) in a varying amount! from 1 ppm to 500 ppm, or ranging from 1 ppm to 250 ppm, or ranging from 1 ppm to 125 ppm; where the total concentration of 4-jCBA and p-TA varies from 1 ppm to 2000 ppm, 1 ppm to 1000 ppm, or from 1 ppm to 500 ppm, or from 1 ppm to 250 ppm, or from 1 ppm to 125 ppm; I and I (3) both of the following: (a) trimellitic acid varying from 140 ppm to 1000 ppm, or ranging from 175 ppm to 750 ppm, or varying from 200 ppm to 500 ppm, or varying from 150 ppm, or 175 ppm, or 200 ppm at 500 ppm, ibiphenyl in an amount that varies from ppm to 150 ppm, or varying from 25 ppm to 100 ppm, or varying! from 25 ppm to 75 ppm, or ranging from 200 ppm, or 300 ppm, or 50q ppm to 1000 ppm, or 2000 ppm, or 0.5% by weight, or 1% by weight, or 2% by weight, or 3% by weight, or % by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 49% by weight; IX. In another embodiment of the invention, the acid composition! carboxyl dry 280 comprises: (1) terephthalic acid in an amount greater than 50 percent by weight, or greater than 60 percent by weight, or greater than 70 percent by weight, or greater than 80 percent by weight, or greater , that 90 percent by weight, or greater than 95 percent by weight,! or greater than 97 percent, or greater than 98 percent, or greater than 98.5 percent, or greater than 99 percent, or greater than 99.5 percent by weight; and (2) 4-carboxybenzaldehyde (4-CBA) in an amount ranging from 1 ppm to 500 ppm, and i (3) tbdo of the following: (a) isophthalic acid in an amount of at least 50 i ppm, or that varies from 50 ppm to 2000 ppm, or that varies from 75 ppm to 150.0 ppm, or that varies from 100 ppm to 1000 ppm, or varies from 150 ppm to 500 ppm, or varies from 50 ppm to 500 ppm. ppm, or 75 ppm, or 100 ppm, or 150 ppm at 500 ppm, or 1000 ppm, or 2000 ppm, or 0. 5% by weight, 1 or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10%! by weight, or 25% by weight, or 4 9% by weight, or ranging from 500 pjpm, or 1000 ppm to 2000 ppm, or 0. 5% by weight or 1% by weight, or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or % by weight, or 49% by weight; i | (b) trimellitic acid that varies from 140 ppm to 1000 ppm, that would vary from 175 ppm to 750 ppm, or that varies from 200 ppm to 500 ppm, or that varies from 150 ppm, or 175 ppm, or 200 ppm at 500 ppm, or 750 ppm, or 1000 ppm; (c) 4, '-dicarboxybiphenyl in an amount ranging from 20 ppm to 150 ppm, or varying from 25 ppm to 100 ppm, or varying from 25 ppm to 75 ppm, or varying from 200 ppm, or 300 ppm , io 50 Q ppm at 1000 ppm, or 2000 ppm, or 0. 5% by weight, or 1% by weight, 'or 2% by weight, or 3% by weight, or 5% by weight, or 10% by weight, or 25% by weight, or 4% by weight. In another embodiment of this invention all compositions of the dried carboxylic acid composition 280 previously set forth further comprise a catalyst composition of less than 1000 ppm, or 500 ppm, or 250 ppm, or 100 ppm. Other ranges are less than 85 ppm, and less than 50 ppm. Still another interval is less than 25 ppm, or so I less than 15 ppm, or at least that 10 ppm or at least In another embodiment of the invention, the cobalt and manganese catalyst. In another embodiment of the catalyst comprises cobalt. 1 All concentrations throughout the description and claims are on a dry solids basis. The physical form of the TPA product can be a dry solid, wet cake, paste, or suspension. For the matter of consistency, any liquid present in the TPA product is ignored when describing its composition. The composition will be expressed as one percent by weight or ppmw (part per million by weight) on a dry solids basis which assumes that there is no moisture in the product. For example, 500 ppmw of p-toluic acid in a TPA product means that there is $ 00 grams of p-toluic acid for every 1,000,000 grams of non-liquid mass in the product regardless of the form! Current physics of the product. All measurements expressed in ppm are ppm by weight. Therefore ppm is equivalent to ppmw throughout the description. In another embodiment of this invention, all previously established compositions are an average composition over a continuous period during the operation of I was permanent. In still another embodiment of the invention, the previously disclosed compositions are the average time compositions obtained on a I period of 7 days, or a period of 14 days, or a period of 30 days during continuous operation. In another embodiment of the invention, the previously disclosed compositions could include any sample taken from a batch of 1 metric ton (1,000 kg) or larger. In another embodiment of the invention, the previously disclosed compositions could include any sample in a shipping container, or a shipping container containing at least 500 kg of the disclosed compositions. In one embodiment of the invention, the compositions of equipment that the inventors have specified will be used to be PET that could be used in the production of coatings, resins, fibers, film, sheets, containers and other shaped articles. In one embodiment of the invention, previously disclosed compositions may have functionalities in the polymerization of PET ranging from zero to at least three.

The functional groups for the polymerization of the polycondensation of polyesters and copolyesters, as well as polyamides, copolyamides, and other co-polydensation polymers comprise reactive carboxyl and reactive hydroxyl groups. The following discussion will focus on the elimination of various impurities or oxidation byproducts on the manufacturing properties of poly (ethylene terephthalate) (PET) as an example.

Zero functional impurities are either removed by the purge process in PET manufacturing or terminated as PET dilution species. Mono j and tri-functional species affect the polymerization ratio, possibly in the fusion phase as well as in the solid state, but usually more so in the solid state due to the difficulty to obtain high molecular weight, especially with chain termination species, monofunctional present Depending on the concentrations, the mono- and tri-functional species can also affect the properties of the PET product by changing the polydispersity of PET of the molecular weight.; For example, p-toluic acid (p-TA) is an impurity that is monofunctional in the polymerization of PET with the PET process polymerization catalysts. In contrast, 4-carboxybenzaldehyde (4-CBA) is monofunctional when used with a Sb (antimony) catalyst in PET polymerization, but can be di- or tri-functional when used with a Ti (titanium) catalyst. ) in the PET polymorization, due to the conversion of the aldehyde group to an emiacetal or an acetal. Trimellitic acid (1,2,4-benzene tricarboxylic acid, or TMA) is a tri-functional impurity. For a first approximation, the mono-j and tri-functional impurities have compensation effects on the polymerization of PET. That is, the amounts Increased amounts of monofunctional impurities, such as p-tolic acid, benzoic acid, monocarboxyfluorenones, bromo-benzoic acid, bromoacetic acid, and 4-CBA (with Sb catalyst), can be compensated with the increased concentration pathway. of tri- or higher functional impurities, such as trimellitic acid, 2, 5, 4 '-tricarboxybiphenyl, 2,5,4'-tricarboxybenzophenone, and 4-CBA (with Ti catalyst). Molar concentrations should be used and not the concentrations based on weight when comparing the effects of polymerization of impurities with functionality different from two, as well as the relative reactivity of the reaction groups (mainly carbojxyl functionality) when the functionality is greater than one. Fortunately, most of the impurities present in the PTA significant concentrations (more than a little ppmw) are bifunctional and thus have no detrimental effects on the polymerization of PET due to their functionality and have no detrimental effects on the properties of the PET polymer. due to its low concentration. In particular, assuming that a PET polymerization process of Sb catalyst, then every 1.0 ppmw of T A will compete approximately 0.060 ppmw of benzoic acid (BA), or 0.65 ppmw of p-TA, due to differences in molecular weight. If the analytical information is known for PTA impurities, that is, the concentrations of impurities and their functionalities then an estimate can be made of the relative total effect on PET polymerization. Note that for IPA, instead of TPA, the compounds will be 3-hydroxybenzoic acid, 3-hydroxymethylbenzoic acid, 3,3'-dicarboxybiphenyl, isomers of dicarboxyquintraquinone, and 3, 3'-dicarboxyistilbene, etc. Similarly, for carboxylic acids, the compounds will be isomers of hydroxybenzoic acid, isomers of hydroxymethylbenzoic acid, isomers of dicarboxybiphenyl, isomers of dicarboxyanthraquinone, and isomers of dicarboxystilbene, etc. In another embodiment of the invention, the above-described carboxylic acid compositions comprising acid, terephthalic or isophthalic or any di-functional carboxylic acid would have a total monofunctional compound concentration of less than 0.25 mole%, or at least that IO.1% in mol, or less than 0.05% in mol, or less than 0.025% in mo | l, or less than 0.01% in mol, or less than 0.005% in mol. In another embodiment of the invention, previously disclosed carboxylic acid compositions comprising terephthalic or isophthalic acid or any difunctional carboxylic acid would have a total monofunctional computing concentration (s) less than 5000 ppm, or less than 2500 ppm, or less than 1000 ppm, or less than 500 ppm, or less than 250 ppm, or less than 100 ppm, or less than 50 ppm. In another embodiment of the invention, the previously disclosed carboxylic acid compositions comprising terephthalic or isophthalic acid or any di-functional carbcjxyl acid would have a concentration of tri-functional compound (s) and greater than total trifunctional lower than 0.5 mol%, or less than 0.25% in mol, or less than 0. 1% ien mole, or less than 0.05% mole, or less than 0.025% mole, or less than 0.01% mole, or less than 0.005% mole. In another embodiment of the invention, the previously disclosed carboxylic acid compositions comprising terephthalic acid or isophthalic acid or any difunctional carbcoxylic acid would have a concentration of trifunctional and more than trifunctional total trifunctional concentration (s)! 5000 ppm, or less than 2500 ppm, or less than 1000 ppm, or less than 500 ppm, or less than 250 ppm, or less than 100 pjpm, or less than 50 ppm. In another embodiment of the invention, the previously disclosed carboxylic acid compositions comprising terephthalic or isophthalic acid or any di-functional carboXylic acid would have a total zero-functional computing concentration (s) of less than 0.5 mol%, or I minor | than 0.25% in mol, or less than 0.1% in mol, or less than 0. 05% | in mol, or less than 0.025 mol%, or less than 0.01 mol%, or less than 0.005 mol%.

? In another embodiment of the invention, previously disclosed carboxylic acid compositions comprising terephthalic or isophthalic acid or any difunctional carboxylic acid would have a total functional zero-composition (s) concentration of less than 5000 ppm, or less than 5OO ppm, or lower that 1000 ppm, or less than 500 ppm, or less | than 250 ppm, or less than 100 ppm, or less than 50 ppm. In another embodiment of the invention, the previously disclosed carboxylic acid compositions comprising terephthalic acid or. isophthalic or any difunctional carboxylic acid would have an average functionality, that river includes species of zero functionalities, of at least 1.9995 or greater, or at least 1996 or greater, or at least 1.997 or more, or at least 1,998 or greater, or at least 1,999 or greater, or at least 1,995 or greater, or at least 1,999 or greater. In another embodiment of the invention, previously disclosed carboxylic acid compositions comprising terephthalic acid or isophthalic acid or any difunctional carbokyl acid would have an average functionality, which does not include species of zero functionalities, of between 1.995 > or 1996, or 1997, or 1998, or 1999, or 1.9995, or 1.9999 and 2.Q000, or 2.0001, or 2.0005, or 2.001, or 2.002 or 2.003, or 2.004 ^ 0 2.005. In another embodiment of the invention, the previously disclosed carboxylic acid compositions comprising terephthalic or isophthalic acid or any difunctional carboxylic acid would have an average functionality, which does not include species with zero carboxyl functionality, of at least 1,996 or greater, or at least 1,997 or greater, or at least 1,998 or greater, or at least 1,999 or greater, or at least 1,995 or greater, or at least 1,999 or greater. In another embodiment of the invention, previously disclosed carboxylic acid compositions comprising terephthalic or isophthalic acid or any difunctional carbonylic acid would have an average carboxyl functionality, which does not include species with zero carboxyl functionality, of between 1,995, or 1,996, or 1,997, or 1,998, or 1,999, or 1,995, or 1,999 and 2,000, or 2,0001, or 2,0005, or 2,001, or 2,002 or 2,003, or 2,004, or 2,005. In another embodiment of the invention, a process for producing an enriched composition 240 is provided as shown in Figures 20A and 20B. In this embodiment, as shown in Figures 20 a &b, the catalyst removal zone 180 is optional and the enrichment zone 210 is required. All the zones in Figures 20 A &B have been previously described in this description. It should be appreciated that the previously described process zones can be used in any other logical order to produce the dry carboxylic acid composition 280. It should also be appreciated that when the process areas are rearranged the process conditions can change. It should also be appreciated that the process zones can be used independently. ! In another embodiment of this invention, each embodiment may optionally include an additional step comprising bleaching the carboxylic acid or an esterified carboxylic acid. Preferably the discoloration is achieved by hydrogenation. Discoloration can occur at any location after the primary oxidation zone I The decolorization of a suspension of carboxylic acid or an esterified carboxylic acid can be achieved by any means known in the art and is not limited to hydrogenation. However, for example in one embodiment of the invention, decolorization can be achieved by the reaction of a carboxylic acid which has been subjected to the esterification treatment, for example with ethylene glycol, with molecular hydrogen in the presence of a hydrogenation catalyst in a decolorization reactor zone for producing a decolorized carboxylic acid solution or a bleached ester product. For the bleaching reactor zone, there are no special limitations on the shape} or construction of the same, subject to an arrangement that allows the supply of. hydrogen to effect the contact I of the carboxylic acid or ester product with the catalyst in the decolorization reactor zone. Typically, the hydrogenation catalyst is usually a single metal of group VIII or combination of metals of group VIII. Preferably, the hydrogenation catalyst is selected from a group consisting of palladium, ruthenium, rhodium: and combinations thereof. The decolorization reaction zone comprises a hydrogenation reactor operating at a temperature and pressure sufficient to hydrogenate a portion of the characteristically yellow compound to colorless derivatives. In another embodiment of the invention, instead of using the drying zone as previously disclosed, the enriched compost 240 can be routed directly to an esterification stage 310 as shown in Figure 16. In this embodiment, the moisture content in the enriched compulsion 240 is predominantly water and the weight percent of acetic acid in the enriched composition 240 is less than 10%, preferably less than 2%, and much more preferably less than 0.1%. "Predominantly" as used in the present means greater! than 85% of the total moisture mass. 'Therefore, instead of drying, in a mode of the; invention, step (i) comprises adding a diol in the cushion 600 to the enriched composition 240 in an area of esterification 610 to remove a portion of the moisture via line 620 to form a mixture of carboxylic acid and diol in the area of the esterification reactor 610. The carboxylic acid and the diol react to; forming a hydroxyalkyl ester stream 630. The hydroxyalkyl ester stream 630 comprises a hydroxyalkyl ester compound. The diol in line 600 is introduced in such a manner to displace the moisture as the dominant suspension liquid. This can be achieved by introducing a diol via the conduit 600 as a saturated liquid in a temperature range from about 150 ° C to about 300 ° C. Preferably, the diol in the conduit 600 is introduced as a saturated or superheated vapor in a temperature range from about 150 ° C to about 300 ° C in a form with sufficient enthalpy to evaporate the water leaving via the conduit 320. The diol in line 600 is selected from the group consisting of ethylene glycol, diethylene glycol, triethylene glycol, 1,3-propanediol, 1,2-propanediol, 1,4-butanediol, 1,3-butanediol, cyclohexanedimethanol, neopentyl glycol, other diols useful in making polyesters and copolyesters, and mixtures thereof. Preferably, the diol in conduit 600 is ethylene glycol. Alternately, an external heat source can be use to introduce enough enthalpy to vaporize the water, which exits via conduit 620. The mixture of. The hydroxyalkyl ester stream exits via the conduit corriender 630. The esterification reactor zone 610 operates at a temperature of about 240 ° C higher. Preferably the esterification reaction zone 610 operates in a temperature range of about 260 ° C Enriched Complication 240 has a significant amount of solvent. "Significant amount" as used herein means greater than 1%, or greater than 2%, or greater than 5% or greater than 10% or greater than 15%. The enriched composition 240 is subjected to a wash or "rinse" with exchange solvent in the liquid exchange zone 500, wherein a portion of the í The initial solvent is replaced with the exchange solvent to form an enriched exchange solvent composition 246. The exchange solvent comprises water, methanol, ethylene glycol, and any diol or monomer compatible with the polyester or copolyester manufacturing process. The composition enriched with exchange solvent 246 is in the range of 0.5-30% by weight of preferably in the range of 1-20% by weight of moisture, and much more in the range of 1-5% by weight of moisture . sidual composition enriched with Exchange solvent 206 could contain less than about 2% by weight of solvent, another range is less than 5% or less than 10% by weight, or less than 20%. In one embodiment of the invention, the exchange solvent is introduced into the liquid exchange zone 500. The exchange solvent is preferably introduced over the! a continuous base. There are no limitations on the temperature or pressure of the exchange solvent that include the use of vaporized water, steam, or a combination of rinse and steam as the wash. The liquid exchange zone 500 comprises at least one liquid solid separating device. The liquid solid separation device may typically be comprised of, but not limited to, the Next types of devices: centrifuges, cyclones, rotary drum filters, band filters, press filters, etc. The liquid solid separation device can operate within a temperature range of about 5 ° C to 195 ° C. The liquid exchange zone and the catalyst removal zone can be within the same device, for example in a band filter. The composition enriched with exchange solvent 246 e subsequently sends to an esterification zone 610 which has been previously described. EXAMPLES A Mode of this invention may be further illustrated by the following examples of the preferred embodiments thereof, although it will be understood that these examples are included merely for purposes of illustration and are not intended to limit scope. PIA Retention Experiments The objective of this set of experiments was to determine how the retention of IPA in the cooled carboxylic acid composition stream 170 varies with the wash temperature and wash ratio of the wash feed stream 175 in the catalyst removal zone 180. All experiments used a Pannevis vacuum balance fijltro apparatus. The cooled carboxylic acid composition stream 170 was prepared by loving a stream of crystallized slurry composition 160 suspending at 30 weight percent solids and boiling the solvent until it reaches 50% solids. The suspension was then cooled to 30 ° C to generate a stream of cooled carboxylic acid composition 170 and charged to the vacuum filter, and then washed with a wash feed stream 175. Both the ratio i of the wash and the temperature of washing were varied in the experiment. A wash ratio of 1 and 0.5 was used. A washing temperature of 90 ° C and 10 ° C was used. The wash was S0% acetic acid and 10% water. The time after the addition of wash until the top dry part of the cake was observed is called the top wash time and the samples of the post-catalyst removal composition 200 were analyzed and analyzed for ppm by weight of IPA. Experiment 1 (Without Washing) 700.10 g of crystallized suspension composition stream 160 were charged to a stainless steel vessel. The suspension was heated until the weight of the suspension was reduced to 420 gms. The suspension was rapidly cooled to 30 ° C using wet ice generating a stream of cooled carboxylic acid composition 170. The cooled carboxylic acid composition stream 170 was fed to a Pannevis vacuum bench scale filter. After feeding the stream of carboxylic acid composition cooled 170 to the vacuum filter 16.5 grams of the cooled carboxylic acid composition stream 170 remained in the steel vessel. The current mass of the cooled carboxylic acid composition stream 170 to the filter was 403.5 grams, (420 grams - 16.5 grams). The weight of the wet cake precatalyst removal composition corrigendum was 266.38 grams. The percent of solids in the wet bag was 94.2%. Samples of the wet cake were sent for analytical IPA analyzes. Experiment 2 (Wash Ratio 0.5, Washing Temperature 90 ° C) 700.04 g of chromate-containing suspension composition stream 160 were charged to a stainless steel vessel. The suspension was heated until the weight of the suspension was re-drawn to 420.73 gms. The suspension was rapidly cooled to 30 ° C using wet ice generating a stream of cooled carboxylic acid composition 170. The cooled carboxylic acid composition stream 170 was fed to a Pannevis vacuum bench scale filter. After feeding the cooled carboxylic acid composition stream to the vacuum filter, 16.5 grams of the cooled carboxylic acid composition stream 170 remained in the stainless steel vessel. The current mass of the cooled carboxylic acid composition buffer 170 to the filter was 405.94 grams (420.73 grams - 14.79 grams).

I After feeding current 170 to the vacuum filter, 12.69 grams of stream 170 remained in the stainless steel vessel. The current mass of current 170 at the filter was 407.56 grams, (420.25 grams - 12.69 grams). The filter cake was washed with 200.14 grams of feed stream of acetic acid / water solution at 90 ° C 175. The weight of the wet cake catalyst post-removal composition stream 200 was 226.61 grams. He % i of solids of the wet catalyst 200% composition stream was 95.4%. Samples of the post-catalyst 200 removal composition were sent for analytical IPA analyzes. Experiment 4 (Wash Ratio 0.5, Washing Temperature ° C) 700.3 g of crystallized suspension composition stream 160 were charged to a stainless steel vessel. The suspension was heated until the weight of the suspension was re-dumped to 420.3 grams. The suspension was cooled rapidly to 30 ° C using humid ice which generates a stream of cooled carboxylic acid composition 170. The stream i 170 sje fed a pannevis vacuum filter bank balance !. After feeding the stream 170 to the vacuum filter 15.29 grams of stream 170 remained in the stainless steel vessel. The current mass of stream 170 to the filter was 405.01 grams, (420.3 grams - 15.29 grams). The filter cake was washed with 100.37 grams of washing feed stream of acetic acid / water solution at 10 ° C. 175. The weight of the post-removal composition stream of wet cake catalyst 200 was 248.84 grams. The% solids of the catalyst composition stream I from tcj > rta humid 200 was 90.75%. The samples of the post-removal catalyst composition were sent for the analytical IPA ai-alysis. experiment 5 (Washing Ratio 1.0, Washing Temperature ° C) i j 700.44 g of crystallized suspension composition stream 160 were charged to a stainless steel vessel. The suspension was heated until the weight of the suspension was reduced to 420.35 grams. The suspension was rapidly cooled to 30 ° C using wet ice generating a stream of cooled carboxylic acid composition 170. The stream of cooled carboxylic acid composition 170 was fed to a Pannevis vacuum bench scale filter. After feeding stream 170 to the vacuum filter, 9.3 grams of stream 170 remained in the stainless steel vessel The current mass of stream 170 to the filter was 411.05 grams (420.35 grams - 9.3 grams). of filter was washed with 200.06 grams of stream i fed from washing acetic acid / water solution at 10 ° C I 175. I The weight of the post cake removal stream stream of wet cake catalyst 200 was 225.06 grams. The% solids of the composition stream of the wet catalyst 200 was 89.55%. Samples of the post-catalyst removal composition were sent for IPA analyzes. Results I It is clear that the retention of IPA varies with the wash temperature and the wash ratio that allows control of IPA content in the post-catalyst removal 200 composition stream. The range of the IA content in stream 200 in The above experiments ranged from 146 ppm to 20 ppm depending on the amount and temperature of the wash. The retention of the selected oxidation byproducts can be controlled by the temperature, composition, and amount of the wash feed stream 175 applied in the catalyst removal zone 180. These data illustrate the retention of oxidation by-product in an area of catalyst removal using IPA as an example. The IPA is considered representative such that other oxidation byproducts can exhibit similar retention behavior under combinations of wash temperature and wash ratio. [Enrichment of PTA with Isophthalic Acid The objective of this experiment was to demonstrate the enrichment of terephthalic acid. In experiment 1, the suspension of the cooled carboxylic acid composition stream 170 was charged to a Pannevis bench vacuum vacuum filter apparatus and the resulting post-catalyst removal 200 was analyzed for the IPA content. In Experiments 2 and 3, the cooled carboxylic acid composition stream suspension 170 was charged to a Pannevis vacuum bench scale filter and the resulting wet cake was washed with the wash feed stream 175 and the composition stream of post catalyst removal 200 was analyzed for IPA content. The wash feed stream 275 contained 90% acetic acid and 10% water by weight. ! In Runs 4 and 5 the cooled carboxylic acid composition buffer suspension 170 was charged to a Pannevis vacuum bench scale filter and the resulting wet cake was washed with the hot wash feed stream 175. The wet cake the resultant catalyst removal post-catalyst stream 200 was then washed with an enrichment stream 220 and the resulting enriched carbojylic acid composition was analyzed for IPA content. Both the catalyst removal zone 180 (to the enrichment zone 210 were achieved with the pannevis vacuum filter apparatus of bench balance i The enrichment feed stream 220 used in Experiments 4 and 5 was prepared from this I manerja. The acetic acid was heated to 80 ° C and enough IPA was added until the IPA would no longer go into solution. Experiment 1 (no cake washing, no enrichment wash) 401.67 grams of the cooled carboxylic acid stream 170 to 23.9 ° C was fed to the catalyst removal zone 180 which was a pannevis vacuum filter of balance. of bank. There was no wash feed stream 175. The weight of the wet cake of stream 200 was 145.5, 5 grams and% solids was 89.4%. A sample of the wet tuft was sent to analyze for IPA analysis. Experiment 2 (cake washing 80 ° C, no enrichment wash) 400.33 grams of the suspension of the cooled carboxylic acid stream 170 to 23.9 ° C was fed to the catalyst removal zone 180 which was a Pannejvis vacuum filter of bank balance. The filter cake was washed with 100.1: 1 grams of 80.2 ° C of the wash feed stream 175. The weight of the resulting catalyst removal stream 200 was 139.49 g and the% solids was 99.94%. The samples of post composition I Removal of catalyst 200 were sent to analyze for IPA analyzes. Experiment 3 (cake wash 80 ° C, no enrichment wash) 401.17 grams of the cooled carboxylic acid composition stream 170 at 24 ° C was fed to the catalyst removal zone 180 which was a vacuum filter Panne view of bank balance. The filter cake was washed with 100.05 grams of wash feed stream at 80.0 ° C. The weight of the resulting post catalyst removal composition was 124.07 grams and the% solids was 99.5%. A sample of the composition of ppst catalyst removal 200 was sent to analyze for the IPA analyzes, Experiment 4 (cake wash 80 ° C, enrichment wash 80 ° C) 400.45 grams of the cooled carboxylic acid composition stream 170 at 24.3 ° C, the catalyst removal zone 180 was fed, which was a Pannevis vacuum bench scale filter. The filter cake was washed with 100. 11 grams of washing feed stream at 80.1 ° C 175. The wet cake was then enriched with 100.52 grams of the 80.2 ° C 220 enrichment feed stream. The weight of the resultant enriched carboxylic acid composition stream 240 was 131.33 grams and the% I I In Experiment 1 the wet cake is not washed resulting in a concentration of 2199 ppm IPA. In Experiments 2 and 3, the wet cake is washed with stream 175 producing a post-catalyst composition 200 with an average IPA concentration of about 900 μm. In experiments 4 and 5 the post catalyst 200 composition is enriched with an enrichment stream 220 to produce an enriched carboxyl composition 240 with an average IPA concentration of about 5000 ppm. It is clear from these data that the IPA was enriched in stream 240 at a concentration above that of the post catalyst composition. These dates I illustrate the enrichment of the oxidation by-product in an enrichment zone using IPA as an example.

The IPA is considered representative of other oxidation products in which the retention of other oxidation by-products in the catalyst removal zone can be influenced by the washing conditions, which include the washing ratio, the washing solvent composition, and the washing temperature, as well as the thickness of the cake and the particle size distribution that affects the I porosjidad of the cake. i

Claims (1)

1. RE IVIND IDATION 1. A process for producing an enriched composition, the process characterized in that it comprises subjecting at least one stream selected from the group consisting of a cooled carboxylic acid composition, a crystallized suspension composition, a suspension composition, and a crude carboxylic acid composition; and url enrichment feeding to an area of I enrichment to form the enriched composition; wherein the enrichment feed comprises at least one compound selected from the group consisting of acid | terephthalic acid, isophthalic acid, italic acid, benzene tricarboxylic acid isomers, benzoic acid, hydroxybenzoic acid isomers, hydroxymethylbenzoic acid isomers, dicarboxybiphenyl isomers, dicarboxystilbene isomers, tricarboxybiphenyl isomers, tricarboxybenzophenone isomers, dicarboxyloxybenzophenone isomers isomers of dicarboxybenzyl, isomers of form-acet-hydroxybenzoic acid, isomers of acetyl-hydroxymethylbenzoic acid, isomers of a-bromo-toluic acid, and acid; bromo-benzoic acid, bromoacetic acid, isomers of toluajldehyde, isomers of benzyl alcohol, isomers of methyl benzyl alcohol and isomers of phthaldehyde; wherein at least one of the compounds is enriched.; 2. The process in accordance with the claim 1, characterized in that at least one of the compounds is enriched by at least 10 ppmw. 3. The process according to claim 1, characterized in that at least one of the compounds is enriched by at least 100 ppmw. I. The process according to claim 1, characterized in that at least one of the compounds is enriched by at least 1000 ppmw. 5. The process according to claim 1, characterized in that at least one of the compounds is enriched by at least 5% by weight. 6. The process according to claim 1, characterized in that at least one of the compounds is enriched by at least 25 ppmw. 7. The process in accordance with the claim 1, characterized in that at least one of the compounds is enriched by at least 30% by weight. I I 8. The process in accordance with the claim 1, characterized in that at least one of the compounds is enriched by at least 50% by weight. 9. The process according to claim 1, characterized in that at least three of the compounds are enriched.; 10. The process according to claim 1, characterized in that at least five of the compounds i They are enriched. 11. The process according to claim 1, characterized in that at least seven of the compounds are enriched. 12. A process for producing an enriched composition, the process characterized in that it comprises subjecting a cooled carboxylic acid composition, or a crystallized suspension composition, or a suspending composition, or a crude carboxylic acid composition; and an enrichment feed to an enrichment zone to form the enriched composition; in I where | the enrichment feed comprises at leastj a compound selected from the group consisting of acid! terephthalic acid, isophthalic acid, italic acid, benzene tricarboxylic acid isomers, benzoic acid, isomers of hydroxybenzoic acid, isomers of hydroxymethylbenzoic acid, isomers of dicarboxybiphenyl, isomers of ticarboxystilbene, isomers of tricarboxybiphenyl, isomers of tricarboxybenzophenone, isomers of dicarboxybenzophenone, isomers of dicarboxybenzyl, isomers of form-acetyl-hydroxybenzoic acid isomers, isomers of acet-hydroxymethylbenzoic acid, isomers of a-bromo-toluic acid, bromo-benzoic acid, bromoacetic acid, isomers of tolua-ldehyde, isomers of benzyl alcohol, isomers of methyl benzyl alcohol and phthaldehyde isomers; where I at least one of the compounds is enriched; and wherein the cooled carboxylic acid composition, or a crystallized suspension composition, or the suspension composition, or the crude carboxylic acid composition comprises terephthalic acid. 13. The process according to claim 12, characterized in that at least one of the compounds is enriched by at least 10 ppmw. 14. The process according to claim 12, characterized in that at least one of the compounds is enriched by at least 100 ppmw. 15. The process according to claim 12, characterized in that at least one of the compounds is enriched by at least 1000 ppmw. 16. The process in accordance with the claim 12, characterized in that at least one of the compounds is enriched by at least 5% by weight. 17. The process in accordance with the claim 12, characterized in that at least one of the compounds is enriched by at least 25 ppmw. 18. The process according to claim 12, characterized in that at least one of the compounds is enriched by at least 30% by weight. 19. The process according to claim 12, characterized in that the carboxylic acid composition cooled, or the crystallized suspension composition, or the suspension composition or the crude carboxylic acid composition comprises terephthalic acid. 20. The process according to claim 12, characterized in that at least one of the compounds is enriched. 21. The process according to claim 12, characterized in that at least five of the compounds are enriched. 22. The process according to claim 12, characterized in that at least seven of the compounds are enriched. 23. A process for producing an enriched composition, the process characterized in that it comprises subjecting a cooled carboxylic acid composition, or a crystallized suspension composition, or a suspending composition, or a crude carboxylic acid composition; and one: enrichment feed to an enrichment zone to form the enriched composition; wherein the enrichment feed comprises at least one compound selected from a group consisting of: isophthalic acid, italic acid, benzene tricarboxylic acid isomers, benzoic acid, isomers of hydroxybenzoic acid, hydroxymethylbenzoic acid isomers, dicarboxybiphenyl isomers , isomers of dicarboxystilbene, isomers of tricarboxybiphenyl, isomers of t-icarboxybenzophenone, isomers of dicarboxybenzophenone, isomers of dicarboxybenzyl, isomers of form-acet-hydroxybenzoic acid, isomers of acet-hydroxymethylbenzoic acid, isomers of a-bromo-toluic acid, bromo-benzoic acid , bromo-acetic acid, tolualdehyde isomers, benzyl alcohol isomers, methyl benzyl alcohol isomers and phthaldehyde isomers; wherein at least one of the compounds is enriched; and wherein the cooled carboxylic acid composition, or the crystallized suspension composition, or the suspension composition, or the crude carboxylic acid composition comprises isophthalic acid. 24. The process according to claim 23. characterized in that at least one of the compounds at least 10 ppmw. process according to claim 1 wherein at least one of the compounds at least 100 ppmw. process in accordance with the claim because at least one of the compounds at least 1000 ppmw. process in accordance with the claim because at least one of the compounds is at least 5% by weight. 28. The process according to claim 23, characterized in that at least one of the compounds is enriched by at least 25 ppmw. 29. The process according to claim 23, characterized in that at least one of the compounds is enriched by at least 30% by weight. 30. The process according to claim 23, characterized in that at least three of the compounds are enriched. I 31. The process in accordance with the claim 23, Characterized because at least five of the compounds are enriched. 32. The process in accordance with the claim 23, characterized in that at least seven of the compounds are enriched. 33. A process for producing an enriched composition, the process characterized in that it comprises subjecting a cooled carboxylic acid composition, or a composition of crystallized suspension or a suspension composition, or a crude carboxylic acid composition; and an enrichment feed to an enrichment zone to form the enriched composition; wherein the enrichment feed comprises at least one compound selected from the group consisting of isophthalic acid, trimellitic acid, 4'-dicarboxybufenyl, phthalic, 4-hydroxymethylbenzoic acid, 4-hydroxymethylbenzoic acid and benzoic acid; wherein at least one of the compounds is enriched; and wherein the composition of the cooled carboxylic acid, or the crystallized suspension composition, or the suspension composition, or the crude carboxylic acid composition comprises terephthalic acid. 34. The process in accordance with the claim 33, characterized in that at least one of the compounds is enriched by at least 10 ppmw. 35. The process according to claim 33, characterized in that at least one of the compounds is enriched by at least 100 ppmw. 36. The process according to claim 33, characterized in that at least one of the compounds is enriched by at least 1000 ppmw. 37. The process according to claim 33, characterized in that at least one of the compounds is enriched by at least 5% by weight. i: 38. The process in accordance with the claim 33, characterized in that at least one of the compounds is enriched by at least 25 ppmw. i 39. The process in accordance with the claim 33, characterized in that at least one of the compounds is enriched by at least 30% by weight. 40. The process according to claim 33, characterized in that at least three of the compounds are enriched. 41. The process according to claim 33, characterized in that all the compounds are enriched. I I I