CN105985515A - Production of polyester - Google Patents
Production of polyester Download PDFInfo
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- CN105985515A CN105985515A CN201510079073.9A CN201510079073A CN105985515A CN 105985515 A CN105985515 A CN 105985515A CN 201510079073 A CN201510079073 A CN 201510079073A CN 105985515 A CN105985515 A CN 105985515A
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/16—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation
- C07C51/21—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen
- C07C51/255—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of compounds containing six-membered aromatic rings without ring-splitting
- C07C51/265—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of compounds containing six-membered aromatic rings without ring-splitting having alkyl side chains which are oxidised to carboxyl groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/42—Separation; Purification; Stabilisation; Use of additives
- C07C51/43—Separation; Purification; Stabilisation; Use of additives by change of the physical state, e.g. crystallisation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/42—Separation; Purification; Stabilisation; Use of additives
- C07C51/47—Separation; Purification; Stabilisation; Use of additives by solid-liquid treatment; by chemisorption
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/78—Preparation processes
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Polyesters Or Polycarbonates (AREA)
Abstract
The present invention provides a method for the production of purified terephthalic acid crystals in an integrated terephthalic acid-polyester plant comprising the steps of: i) providing a stream of purified terephthalic acid crystals in an aqueous medium; ii) separating the purified terephthalic acid crystals from the aqueous medium in a filtration zone; and iii) washing the purified terephthalic acid crystals with an aqueous wash liquid, characterised in that at least a portion of the aqueous wash liquid is derived from an aqueous condensate liquor from the polyester plant.
Description
Technical field
The present invention relates to the operation of the p-phthalic acid-polyester device of combination.
Background technology
Aromatic dicarboxylic acid generally passes through the catalysis oxidation in organic solvent of hydrocarbon precursor and manufactures.Example is right
Phthalic acid (TA), it is widely used in prepares polyester, such as poly-(PETP) (PET).
It is referred to as " p-phthalic acid of purification " (PTA) as the TA needed for the reactant prepared for PET,
And usually contain the p-phthalic acid more than 99.97 weight %, preferably more than 99.99 weight %,
And less than 25ppm 4-carboxyl benzaldehyde (4-CBA).At industrial scale, be suitable in PET system
The PTA of standby middle use is generally prepared with two-phase method.First, by xylol at metallic catalyst
(such as, using air) is aoxidized to carry in the presence of (such as, cobalt and/or manganese salt or compound)
For " crude terephthalic acid " (CTA), as at such as US 2, described in 833,816.Then, will be logical
Cross CTA purification prepared by this oxidation reaction because its generally by impurity such as 4-CBA, to methylbenzene
Formic acid, and give the flaxen various foreign pigment of TA polluted.The purification of CTA is except needs
Outside at least one physical process (such as, crystallize, washing etc.), generally also need at least one and change
Learn and convert (such as, hydrogenation) to produce PTA.PET thus by between ethylene glycol and PTA
Esterification is formed.
PET is generally viewed as batch item of merchandise, and its annual production has tens million of ton, and therefore manufactures
Business expects to reduce its cost so that the economy prepared of PET and efficiency maximize.This can be by reducing
Capital cost (such as, equipment cost) and variable cost are (such as, with waste treatment, starting material
Matter use, organic solvent, cost that heating fuel is relevant with deionized water) realize.
The PTA-PET device of combination can include that the above-mentioned washing process for preparing PTA is many
Individual method step uses deionized water.Additionally, the PTA-PET device of combination generates the most aqueous
Waste stream, this aqueous wash streams not only needs high one-tenth originally processed and disposed, it is also possible to environment
Harmful.USSN 61/984,598 (it is incorporated herein by reference in full) discloses to come for purification
From the aqueous wash streams of integrated form PTA-PET device and purified water is recycled and returned to integrated form
PTA-PET device, the method especially forming CTA serosity before its purification.
It is an object of the invention to provide a kind of combination manufacture p-phthalic acid and polyester more economical also
And more effective way, specifically, minimize the deionization of the p-phthalic acid-polyester device of combination
Water consumption and/or the aqueous waste produced by the p-phthalic acid combined-polyester device, thus reduction can
Become this and the impact on environment.Further purpose will be clear to from description below.
Summary of the invention
The invention provides a kind of for preparing purification in integrated form p-phthalic acid-polyester device
The method of terephthalic acid crystals, said method comprising the steps of:
I) stream of the terephthalic acid crystals of the purification being in water-bearing media is provided；
Ii) terephthalic acid crystals of described purification is separated from described water-bearing media in filtering area；With
And
Iii) aqueous cleaning solution is used to wash the terephthalic acid crystals of described purification,
It is characterized in that, coming from least partially from described polyester device of described aqueous cleaning solution
Aqueous condensed fluid.
It has been found by the inventor that it comes from autopolyester the most directly or indirectly
The aqueous cleaning solution of the aqueous condensed fluid of device is applicable to wash the terephthalic acid crystals of purification, i.e.
In this aqueous cleaning solution, the terephthalic acid crystals of the purification of washing is suitable to use in PET device.
Accordingly, because aqueous condensed fluid is recycled rather than is discharged, so by integrated form PTA-PET
The aqueous effluent that device generates reduces, and the deionization used during preparation aqueous cleaning solution
Water can reduce, thus reduces variable cost.Additionally, aqueous condensed fluid is generally with about 120 DEG C
Temperature leaves polyester device, therefore can serve as the thermal source on para-phthalic acid (pta), thus further
Reduce variable cost.
Detailed description of the invention
This document describes multiple embodiments of the present invention.It should be appreciated that each embodiment middle finger
Fixed feature can be combined with other specific characteristics to provide other embodiments.
Should be appreciated that the general operation of integrated form p-phthalic acid-polyester device and method is many institutes week
Know.Such as, as it has been described above, be suitable to poly-(PETP) prepare in use to benzene
Dioctyl phthalate (that is, the p-phthalic acid of purification) is generally prepared with two-phase method.First, will be to diformazan
Oxidation is (such as, in the presence of metallic catalyst (such as, cobalt and/or manganese salt or compound) for benzene
Use air) to provide crude terephthalic acid.Then, thick to benzene by prepared by this oxidation reaction
Dioctyl phthalate purification is to go the removal of impurity, such as 4-CBA and p-methylbenzoic acid, with generate purification to benzene
Dioctyl phthalate.The purification of crude terephthalic acid except at least one physical process of needs (such as, crystallization,
Washing etc.) outside, generally also need at least one chemical conversion (such as, hydrogenation).Poly-(to benzene two
Formic acid second diester) formed by the esterification between ethylene glycol and the p-phthalic acid of purification.
The preparation of p-phthalic acid
P-phthalic acid is generally by the method system including the catalysis oxidation in organic solvent of hydrocarbon precursor
Standby.Hydrocarbon precursor is the compound of oxidable formation p-phthalic acid.Therefore, hydrocarbon precursor is usually right
The position of the carboxylic acid substituent in phthalic acid is by such as C1-6The substituted benzene of alkyl, formoxyl or acetyl group.
Preferably hydrocarbon precursor is C1-6The substituted benzene of alkyl, specifically, for xylol.Organic solvent is usual
For aliphatic carboxylic acid, such as acetic acid, or the mixture of one or more these type of aliphatic carboxylic acids and water.Oxidation is anti-
Should have wherein oxygen any under the conditions of carry out, such as, this reaction can be carried out in atmosphere.Instead
Answer catalyst to generally comprise cobalt and/or the manganese (such as, their acetate) of soluble form, use bromine
Source (such as hydrogen bromide) is as accelerator.The temperature of oxidation reaction is generally the scope of about 100-250 DEG C
In, it is therefore preferable to about 150-220 DEG C.The pressure of any routine can be used in this reaction, with suitably
This reactant mixture is kept in the liquid state.
Oxidation panel performs to be catalyzed hydrocarbon precursor in organic solvent the function of oxidation, thus forms product stream
With discharge gas.Generally product stream is sent to crystallized region to form the first of crude terephthalic acid crystal
Serosity and overhead vapours.Generally the first serosity of crude terephthalic acid crystal is sent to segregation section, its
Middle mother solution is separated with crude terephthalic acid crystal, then can with liquid, aqueous mix to be formed thick
Second serosity of terephthalic acid crystals.Generally by this second serosity transmission of crude terephthalic acid crystal
To purification devices, heat and hydrogenate, cooling down to be formed the terephthalic acid crystals of purification afterwards
Serosity.
In distilling period, the discharge gas of autoxidation section is separated to the stream rich in organic solvent the most in the future
With rich in the steam stream of water.The stream rich in organic solvent from distilling period generally comprises 80-95%
The organic solvent of w/w, and generally return oxidation panel.The steaming rich in water from distilling period
Air-flow generally comprises the organic solvent of 0.1-5.0% w/w, and generally condenses in condensation segment
To form condensate flow and overhead gas.A part for condensate flow be typically used as formed above-mentioned slightly
The source of aqueous liquid of the second serosity of terephthalic acid crystals.In the present invention, the preferred shape of condensate flow
Become to be used for a part for the wash fluid of the terephthalic acid crystals of the purification from purification devices.
The preparation of polyester
Polyester the most poly-(PETP).Poly-(PETP) generally passes through
The p-phthalic acid of ethylene glycol and purification is at a temperature of the pressure of about 2-6barA and about 200-300 DEG C
Esterification prepare.Generally by from a byproduct stream of esterification, (or multiple byproduct stream takes
Certainly configure in device) feed into distillation column, the ethylene glycol of the excess will can reclaim and reuse
With water and by-product Separation of Organic Compounds.Gas can also will be delivered to from the aqueous stream at distillation column top
Stripper, to reduce the level of by-product organic compound therein.Therefore, from PET device
The aqueous condensed fluid of gained can comprise one or more organic compound selected from the following: acetaldehyde；2-
Methyl isophthalic acid, 3-dioxolanes；Isosorbide-5-Nitrae-dioxane；Ethylene glycol；And acetic acid.More specifically, containing water-cooled
Lime set can comprise the acetaldehyde of 0.01-3 weight %；The 2-methyl isophthalic acid of 0.01-3 weight %, 3-dioxolanes；
Isosorbide-5-Nitrae-the dioxane of 0.01-0.5 weight %；The ethylene glycol of 0.01-2 weight %；And/or 0.01-1 weight
The acetic acid of amount %.Even more specifically, aqueous condensed fluid can comprise the acetaldehyde of 0.5-2 weight %；
The 2-methyl isophthalic acid of 0.5-2 weight %, 3-dioxolanes；Isosorbide-5-Nitrae-the dioxane of 0.1-0.25 weight %；0.1-1
The ethylene glycol of weight %；And/or the acetic acid of 0.1-0.75 weight %.The surplus of aqueous condensed fluid is usually
Water, i.e. aqueous condensed fluid can comprise the water of at least 90.5 weight % or at least 92 weight %
Water or the water of at least 95 weight %.In conventional integrated form p-phthalic acid-polyester device, will
This aqueous condensed fluid processes independent of terephthalic acid process's waste water, recycles and discharge.
Aqueous cleaning solution
In the present invention, aqueous cleaning solution come from aqueous condensed fluid at least partially.Such as, at least
1 weight %, at least 2 weight %, at least 5 weight %, at least 10 weight %, at least 20 weight %,
The aqueous cleaning solution of at least 30 weight % or at least 40 weight % comes from aqueous condensed fluid.Such as, 1-75
Containing of weight %, 2-50 weight %, 5-40 weight %, 10-30 weight % or about 15 weight % is washed
Wash liquid and come from aqueous condensed fluid.The remainder of wash fluid generally results from the condensate from condensation segment
Stream, but it is possible if desired to use other aqueous process streams and (the need to) deionized water preparation
Aqueous cleaning solution.Therefore, aqueous condensed fluid obtain aqueous cleaning solution preparation can be reduced or eliminated contain
Use to deionized water during water washing liquor.
The part coming from aqueous condensed fluid of aqueous cleaning solution can come from aqueous condensation directly or indirectly
Liquid.As used herein, " directly " means that aqueous condensed fluid is before preparing aqueous cleaning solution
Without undergoing any intermediate treatment to change its composition.Should be appreciated that due to aqueous cleaning solution also can by (and
And, preferably by) condensate flow (be also likely to be other stream) preparation, so its composition is different from and contains
Water-cooled lime set.Therefore, in this embodiment, aqueous cleaning solution comprises and is present in aqueous condensed fluid
Organic compound, i.e. aqueous cleaning solution comprises one or more organic compounds selected from the following
Thing: acetaldehyde；2-methyl isophthalic acid, 3-dioxolanes；Isosorbide-5-Nitrae-dioxane；Ethylene glycol；And acetic acid.Directly
It is useful for being obtained aqueous cleaning solution by aqueous condensed fluid, because this avoids and process aqueous condensed fluid
To remove the relevant capital cost of above-mentioned organic component and variable cost.The present inventor is unexpectedly
Find that the aqueous cleaning solution comprising above-mentioned organic compound is applicable to wash PTA crystal.
As used herein, " indirectly " means to contain before preparing aqueous cleaning solution water-cooled lime set
Underway processes to change its composition, has for example, it is possible to process aqueous condensed fluid so that removing is above-mentioned
Some or all in machine compound.Process for example, it is possible to aqueous condensed fluid to be carried out one or more
Process, " the extraction as described in WO 2014/070766 A1 that full text is incorporated herein by reference
Process " and/or " reverse osmosis ".Can also by aqueous condensed fluid with from other of combination unit other places
Stream, as purification devices mother solution (PPML) mixes.PPML can include therefrom isolating PTA crystal
Mother solution and, optionally, have been used for wash PTA crystal aqueous cleaning fluid.Therefore,
In this embodiment, aqueous condensed fluid is sent to extraction section to form aqueous stream and organic stream.Cause
This, in this embodiment, aqueous cleaning solution come from aqueous stream at least partially.Optionally, will
Aqueous condensed fluid merged with PPML before being sent to extraction section.Alternatively, not by aqueous
Condensed fluid merges with PPML.Extraction section can comprise the following steps that by aqueous condensed fluid (and,
Optionally, PPML) merge to form mixture with the solution comprising organic entrainer, this mixture
Temperature lower than the azeotropic temperature of this mixture at least about 20 DEG C；And separated the mixture into
Machine stream (it can comprise the aromatic carboxylic acid of remnants) and aqueous stream.Extraction section can also include walking as follows
Rapid: by aqueous stream optionally via with the effluent heat exchange from recovery tower and heat, with formed add
The aqueous stream of heat；And feeding the aqueous stream of heating to recovery tower at least partially.Recovery tower sets
For going out the organic compound of remnants from aqueous stream air stripping, (such as, it can be to include multiple column plate to meter
Stripping tower, described column plate is referred to as Theoretical Equilibrium column plate in the art).Extraction section may also include
Following steps: organic stream is optionally heated via the heat exchange with the effluent from distillation column,
To form the organic stream of heating；And the organic stream of heating is fed to distillation column.From extraction section (i.e.,
From recovery tower) aqueous stream that removes can stand other process step, contacts with alkali including making aqueous stream
To form pH adjusted stream；Make pH adjusted stream and filter contacts, treated to be formed
Stream；And make treated stream contact with reverse osmosis unit, may be used for preparation containing washing to be formed
Wash the liquid, aqueous of liquid.Therefore, in this embodiment, the coming from least partially of aqueous cleaning solution
Liquid, aqueous.
Filtering area
Filtering area can include at least one defecator, such as revolving filter.Revolving filter is usual
Including the rotating cylinder that can rotate in the enclosure, this shell is divided into a series of region around its girth, at this
One processing section (such as, segregation section, washing section etc.) can be applied to filter by each of a little regions
Cake.Therefore, revolving filter can include for by PTA crystal from PTA crystal suspension in wherein
The firstth district of separating in the following manner of water-bearing media: make serosity be filtered through filtration in the firstth district
Device surface is to remove water-bearing media, thus obtains the moist mass of PTA crystal.Revolving filter is subsequently
Operation can be that the moist mass of PTA crystal is sent to the secondth district is (brilliant without pulp PTA again
The moist mass of body), and realized while by the moist mass of aqueous cleaning solution supply to PTA crystal
Filter.Therefore, aqueous cleaning solution can move through the moist mass of PTA crystal in the second region and pass
Filter surfaces, thus wash the moist mass of PTA crystal.Therefore, aqueous cleaning solution washing is used
The terephthalic acid crystals of purification can be carried out in filtering area.
Embodiment according to the disclosure, it is provided that below scheme.
Scheme 1
A kind of terephthaldehyde's acid crystals for preparing purification in integrated form p-phthalic acid-polyester device
The method of body, said method comprising the steps of:
I) stream of the terephthalic acid crystals of the purification in offer water-bearing media；
Ii) terephthalic acid crystals of described purification is separated from described water-bearing media in filtering area；With
And
Iii) aqueous cleaning solution is used to wash the terephthalic acid crystals of described purification,
It is characterized in that, coming from least partially from described polyester device of described aqueous cleaning solution
Aqueous condensed fluid.
Scheme 2
According to the method described in scheme 1, wherein said aqueous condensed fluid comprises selected from the following
Plant or multiple organic compound: acetaldehyde；2-methyl isophthalic acid, 3-dioxolanes；Isosorbide-5-Nitrae-dioxane；Second two
Alcohol；And acetic acid.
Scheme 3
According to the method described in scheme 2, wherein said aqueous condensed fluid comprises the second of 0.01-3 weight %
Aldehyde；The 2-methyl isophthalic acid of 0.01-3 weight %, 3-dioxolanes；Isosorbide-5-Nitrae-the dioxane of 0.01-0.5 weight %；
The ethylene glycol of 0.01-2 weight %；And/or the acetic acid of 0.01-1 weight %.
Scheme 4
According to the method described in any one in front scheme, at least the one of wherein said aqueous cleaning solution
Part is directly derived from described aqueous condensed fluid.
Scheme 5
According to the method described in any one in scheme 1-3, described method is further comprising the steps of:
Iv) described aqueous condensed fluid is sent to extraction section to form aqueous stream and organic stream,
Wherein said aqueous cleaning solution come from described aqueous stream at least partially.
Scheme 6
According to the method described in scheme 5, wherein by described aqueous condensed fluid in step iv) in transmit
Merged with purification devices mother solution before described extraction section.
Scheme 7
According to the method described in scheme 5 or scheme 6, described method is further comprising the steps of:
V) described aqueous stream is made to contact with alkali to form pH adjusted stream；
Vi) make described pH adjusted stream and filter contacts to form treated stream；And
Vii) described treated stream is made to contact with reverse osmosis unit to be formed liquid, aqueous,
Coming from least partially of wherein said aqueous cleaning solution is described liquid, aqueous.
Additionally, in some embodiments, the disclosure also includes following additional aspects.
Additional aspects 1
A kind of integrated form p-phthalic acid-polyester device, described integrated form p-phthalic acid-polyester device
Including
P-phthalic acid preparation facilities, described p-phthalic acid preparation facilities includes
Oxidation panel；
Crystallized region；With
Segregation section,
Polyester preparation facilities, described polyester preparation facilities includes
Esterification section,
Produce the stripping tower of aqueous condensed fluid；And
Described p-phthalic acid preparation facilities also includes
Use the terephthalic acid crystals wash mill of described aqueous condensed fluid.
Additional aspects 2
According to the integrated form p-phthalic acid-polyester device described in additional aspects 1, wherein said to benzene
It is one or more that dioctyl phthalate preparation facilities also includes before described terephthalic acid crystals wash mill
Purification devices.
Additional aspects 3
According to the integrated form p-phthalic acid-polyester device described in additional aspects 2, wherein said one
Or multiple purification devices includes,
Heater,
Hydrogenation apparatus, and
Chiller.
Additional aspects 4
According to the integrated form p-phthalic acid-polyester device described in additional aspects 3, wherein said cooling
Device includes the series of crystallization device reducing the pressure of serosity.
Additional aspects 5
According to the integrated form p-phthalic acid-polyester device described in additional aspects 1, described device also wraps
Include the extraction section processing described aqueous condensed fluid.
Additional aspects 6
According to the integrated form p-phthalic acid-polyester device described in additional aspects 5, wherein said extraction
Section includes
Heat the heater of described aqueous condensed fluid；With
Recovery tower.
Additional aspects 7
According to the integrated form p-phthalic acid-polyester device described in additional aspects 5, wherein said extraction
Section includes
At organic liquid and from the heat exchanger of exchanged heat between the effluent of distillation column.
Additional aspects 8
According to the integrated form p-phthalic acid-polyester device described in additional aspects 6 or 7, wherein said
Extraction section also includes pH regulator device.
Additional aspects 9
According to the integrated form p-phthalic acid-polyester device described in additional aspects 8, wherein said extraction
Section also includes filter.
Additional aspects 10
According to the integrated form p-phthalic acid-polyester device described in additional aspects 9, wherein said extraction
Section also includes reverse osmosis unit.
Additional aspects 11
According to the integrated form p-phthalic acid-polyester device described in additional aspects 1, wherein said to benzene
Dioctyl phthalate crystal wash mill is filtering area.
Additional aspects 12
According to the integrated form p-phthalic acid-polyester device described in additional aspects 11, wherein said filtration
District includes at least one defecator.
Additional aspects 13
According to the integrated form p-phthalic acid-polyester device described in additional aspects 12, wherein said filtration
Device is revolving filter.
Additional aspects 14
According to the integrated form p-phthalic acid-polyester device described in additional aspects 13, wherein said rotation
The rotating cylinder that filter rotates in being included in shell, described shell is divided into a series of region around its girth,
One processing section is applied to filter cake by each of these regions.
Additional aspects 15
According to the integrated form p-phthalic acid-polyester device described in additional aspects 13, wherein said rotation
Filter includes the scrubbing section using described aqueous condensed fluid.
Claims (7)
1. the p-phthalic acid being used for preparing purification in integrated form p-phthalic acid-polyester device
The method of crystal, said method comprising the steps of:
I) stream of the terephthalic acid crystals of the purification in offer water-bearing media；
Ii) terephthalic acid crystals of described purification is separated from described water-bearing media in filtering area；With
And
Iii) aqueous cleaning solution is used to wash the terephthalic acid crystals of described purification,
It is characterized in that, coming from least partially from described polyester device of described aqueous cleaning solution
Aqueous condensed fluid.
Method the most according to claim 1, wherein said aqueous condensed fluid comprises selected from following
One or more every organic compound: acetaldehyde；2-methyl isophthalic acid, 3-dioxolanes；Isosorbide-5-Nitrae-dioxy six
Ring；Ethylene glycol；And acetic acid.
Method the most according to claim 2, wherein said aqueous condensed fluid comprises 0.01-3 weight
The acetaldehyde of amount %；The 2-methyl isophthalic acid of 0.01-3 weight %, 3-dioxolanes；The Isosorbide-5-Nitrae of 0.01-0.5 weight %-
Dioxane；The ethylene glycol of 0.01-2 weight %；And/or the acetic acid of 0.01-1 weight %.
4. according to the method described in any one in front claim, wherein said aqueous cleaning solution
Be directly derived from described aqueous condensed fluid at least partially.
5., according to the method described in any one in claim 1-3, described method also includes following step
Rapid:
Iv) described aqueous condensed fluid is sent to extraction section to form aqueous stream and organic stream,
Wherein said aqueous cleaning solution come from described aqueous stream at least partially.
Method the most according to claim 5, wherein by described aqueous condensed fluid in step iv)
In be sent to described extraction section before merge with purification devices mother solution.
7., according to the method described in claim 5 or claim 6, described method also includes following
Step:
V) described aqueous stream is made to contact with alkali to form pH adjusted stream；
Vi) make described pH adjusted stream and filter contacts to form treated stream；And
Vii) described treated stream is made to contact with reverse osmosis unit to be formed liquid, aqueous,
Coming from least partially of wherein said aqueous cleaning solution is described liquid, aqueous.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GBGB1418362.8A GB201418362D0 (en) | 2014-10-16 | 2014-10-16 | Production of a polyester |
| GB1418362.8 | 2014-10-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105985515A true CN105985515A (en) | 2016-10-05 |
Family
ID=52013076
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510079073.9A Pending CN105985515A (en) | 2014-10-16 | 2015-02-13 | Production of polyester |
| CN201520108092.5U Expired - Fee Related CN204644246U (en) | 2014-10-16 | 2015-02-13 | Integrated form terephthalic acid-polyester device |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520108092.5U Expired - Fee Related CN204644246U (en) | 2014-10-16 | 2015-02-13 | Integrated form terephthalic acid-polyester device |
Country Status (3)
| Country | Link |
|---|---|
| CN (2) | CN105985515A (en) |
| GB (1) | GB201418362D0 (en) |
| WO (1) | WO2016059127A1 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PT1861348E (en) * | 2005-03-21 | 2010-10-27 | Bp Corp North America Inc | Process and apparatus for manufacturing pure forms of aromatic carboxylic acids |
| US8202962B2 (en) * | 2008-10-31 | 2012-06-19 | Grupo Petrotemex, S.A. De C.V. | Integrated steam heating in polyester production process |
-
2014
- 2014-10-16 GB GBGB1418362.8A patent/GB201418362D0/en not_active Ceased
-
2015
- 2015-02-13 CN CN201510079073.9A patent/CN105985515A/en active Pending
- 2015-02-13 CN CN201520108092.5U patent/CN204644246U/en not_active Expired - Fee Related
- 2015-10-14 WO PCT/EP2015/073810 patent/WO2016059127A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| GB201418362D0 (en) | 2014-12-03 |
| WO2016059127A1 (en) | 2016-04-21 |
| CN204644246U (en) | 2015-09-16 |
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Application publication date: 20161005 |