WO2007108259A1 - ビスフェノールaの製造方法 - Google Patents
ビスフェノールaの製造方法 Download PDFInfo
- Publication number
- WO2007108259A1 WO2007108259A1 PCT/JP2007/052724 JP2007052724W WO2007108259A1 WO 2007108259 A1 WO2007108259 A1 WO 2007108259A1 JP 2007052724 W JP2007052724 W JP 2007052724W WO 2007108259 A1 WO2007108259 A1 WO 2007108259A1
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- WO
- WIPO (PCT)
- Prior art keywords
- filter cloth
- bisphenol
- yarn
- phenol
- producing bisphenol
- Prior art date
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C39/00—Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a six-membered aromatic ring
- C07C39/12—Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a six-membered aromatic ring polycyclic with no unsaturation outside the aromatic rings
- C07C39/15—Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a six-membered aromatic ring polycyclic with no unsaturation outside the aromatic rings with all hydroxy groups on non-condensed rings, e.g. phenylphenol
- C07C39/16—Bis-(hydroxyphenyl) alkanes; Tris-(hydroxyphenyl)alkanes
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C37/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring
- C07C37/68—Purification; separation; Use of additives, e.g. for stabilisation
- C07C37/70—Purification; separation; Use of additives, e.g. for stabilisation by physical treatment
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C37/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring
- C07C37/68—Purification; separation; Use of additives, e.g. for stabilisation
- C07C37/70—Purification; separation; Use of additives, e.g. for stabilisation by physical treatment
- C07C37/82—Purification; separation; Use of additives, e.g. for stabilisation by physical treatment by solid-liquid treatment; by chemisorption
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C37/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring
- C07C37/68—Purification; separation; Use of additives, e.g. for stabilisation
- C07C37/70—Purification; separation; Use of additives, e.g. for stabilisation by physical treatment
- C07C37/84—Purification; separation; Use of additives, e.g. for stabilisation by physical treatment by crystallisation
Definitions
- the present invention provides a filter cloth that has a long filter cloth life and can exhibit stable filtration performance in solid-liquid separation of a slurry containing an adhesive product of bisphenol A and phenol.
- the present invention relates to a method for producing bisphenol A using a mounted horizontal belt filter.
- Bisphenol A which is used as a raw material for polycarbonate, which has recently been increasing in demand as an engineering plastic, is produced by a condensation reaction between an excess amount of phenol and acetone in the presence of an acidic catalyst. .
- Patent Documents 1 and 2 describe the use of a horizontal belt filter as a solid-liquid separation method.
- the horizontal belt filter is equipped with a filter cloth, which is driven at 1 to 5mZ, and slurry is supplied onto it and filtered and washed, and the adduct of bisphenol A and phenol is discharged as a cake. To do.
- the filtrate or cleaning solution used for cleaning passes through the vacuum tray that is driven back and forth several times a minute, and is connected to the vacuum tray so that the hose force is discharged.
- the filter cloth on which the thick cake is placed and the vacuum tray are in constant contact with each other, and the filter cloth will wear due to friction with the vacuum tray each time the vacuum tray repeats moving forward and backward.
- the horizontal belt filter body is exposed to heated acidic phenol gas, which is a severe condition that is highly corrosive to metals and various fiber materials.
- Patent Document 1 Japanese Patent Laid-Open No. 7-47209
- Patent Document 2 Japanese Unexamined Patent Application Publication No. 2004-137197
- the present invention has been made in order to solve the problems under the circumstances as described above, and for solid-liquid separation of a slurry containing an energized residue of bisphenol A and phenol!
- An object of the present invention is to provide a method for producing bisphenol A using a horizontal belt filter equipped with a filter cloth that has a long filter life and can exhibit stable filtration performance. Means for solving the problem
- the inventors of the present invention have made extensive studies to achieve the above object.
- the above-mentioned object can be achieved by using a horizontal belt filter fitted with a filter cloth woven with a uniform yarn diameter and having an air permeability of 50-: LOOmlZcm 2 'sec. Based on this finding, the present invention has been completed.
- the present invention provides:
- a method for producing bisphenol A characterized in that the horizontal belt filter used uses a filter cloth woven with a uniform yarn diameter and having an air permeability of 50-: LOOmlZcm 2 s.
- a maley polypropylene hot melt adhesive is applied to the filter cloth part of the hooked portion.
- FIG. 1 is a schematic view of a solid-liquid separator using a horizontal belt filter of the present invention.
- FIG. 2 is a diagram illustrating an example of a joined portion of a filter cloth of a horizontal belt filter of the present invention.
- the method for producing bisphenol A of the present invention provides stable filtration performance with a long filter cloth life in solid-liquid separation of a slurry containing a carotenate of bisphenol A and phenol. It is characterized by using a horizontal belt filter with a filter cloth that can be used.
- a horizontal belt filter is used in the solid-liquid separation step of the above steps (D) and Z or (D ′), and the belt filter is attached to the long-life and stable.
- a filter cloth with filtration performance By using a filter cloth with filtration performance, a stable method for producing bisphenol A is provided.
- acid-type ion exchange resin can be used.
- this acid type ion exchange resin there is no particular limitation, and those conventionally used as catalysts for bisphenol A can be used.
- sulfonic acid type cation exchange resins are particularly used from the viewpoint of catalytic activity.
- the sulfonic acid type cation exchange resin is not particularly limited as long as it is a strong acid cation exchange resin having a sulfonic acid group, and examples thereof include sulfonated styrene-dibutylbenzene copolymer, sulfone. Crosslinked styrene polymer, phenol formaldehyde-sulfonic acid resin, benzeneformaldehyde-sulfonic acid resin, and the like. These may be used alone or in combination of two or more.
- mercabtans are usually used in combination with the acid-type ion exchange resin as a promoter.
- This mercaptan refers to a compound having an SH group in the molecule in a free form.
- an alkyl mercaptan or an alkyl having one or more substituents such as a carboxyl group, an amino group, and a hydroxyl group is used.
- Mercaptans such as mercaptocarboxylic acid, aminoalkanethiol, mercapto alcohol and the like can be used.
- alkyl mercaptans such as methyl mercaptan, ethyl mercaptan, n-butyl mercaptan, n-octyl mercaptan, thioglycolic acid, thiocarboxylic acids such as j8-mercaptopropionic acid, 2-amino Aminoalkanethiol such as ethanethiol and mercapto such as mercaptoethanol
- alkyl mercaptan is particularly preferable from the viewpoint of the effect as a co-catalyst.
- These mercaptans may be used alone or in combination of two or more. These mercaptans can be immobilized on the acid type ion exchange resin and function as a promoter.
- the amount of the mercaptans used is generally selected in the range of 0.1 to 20 mol%, preferably 1 to 10 mol%, based on the raw material acetone.
- the ratio of phenol and acetone used is not particularly limited, but it is desirable that the amount of unreacted acetone be as small as possible from the viewpoint of ease of purification of bisphenol A to be produced and economy. It is advantageous to use phenol in excess of the stoichiometric amount. Usually 3 to 30 moles, preferably 5 to 15 moles of phenol are used per mole of acetone.
- a reaction solvent is generally not required except for reaction at a low temperature at which the viscosity of the reaction solution becomes high and the operation becomes difficult due to solidification.
- the condensation reaction of phenol and acetone may be either a batch type or a continuous type.
- a reaction column packed with acid-type ion-exchange resin is added to phenol, acetone, and mercabtans.
- one reaction tower may be used, or two or more reaction towers may be arranged in series.
- two or more reaction towers filled with an acid ion exchange resin are connected in series. Adopting a fixed bed multistage continuous reaction system is particularly advantageous.
- the molar ratio of acetone Z phenol is usually selected in the range of 1Z30 to: LZ3, preferably 1Z15 to 1 Z5. If this molar ratio is less than 1Z30, the reaction rate may be too slow, and if it is greater than 1Z3, more impurities are produced and the selectivity for bisphenol A tends to decrease.
- the molar ratio of mercaptans Z acetone is usually selected in the range of 0.1Z100 to 20Z100, preferably 1/10 to 10/100. . When this molar ratio is smaller than 0.1 to 100, the effect of improving the reaction rate and the selectivity of bisphenol A is not sufficiently exhibited.
- the reaction temperature is usually selected in the range of 40 to 150 ° C, preferably 60 to 110 ° C. If the temperature is less than 40 ° C, the reaction rate is slow and the viscosity of the reaction solution may be solidified, which may cause solidification. If the temperature exceeds 150 ° C, the reaction control becomes difficult, and bisphenol is used.
- the selectivity of ⁇ ( ⁇ , ⁇ 'integrated) decreases, and the acid type ion exchange resin of the catalyst may be decomposed or deteriorated.
- the LHSV (liquid hourly space velocity) of the raw material mixture is usually selected within the range of 0.2 to 3, preferably 0.5 to LOLO- 1 .
- the reaction mixture containing bisphenol A obtained in the reaction step (A) described above is in a state that does not substantially contain an acid ion exchange resin, that is, a batch reaction.
- the catalyst is removed by filtration or the like, and in the case of the fixed bed continuous reaction system, the low boiling point substance removal treatment is performed as it is.
- low-boiling substances such as unreacted acetone, by-product water and alkyl mercaptan are first removed by a vacuum distillation method using a distillation column.
- Vacuum distillation is generally carried out under conditions of a pressure of 6.5 to 80 kPa and a temperature of 70 to 180 ° C.
- unreacted phenol azeotropes, and a part of the unreacted phenol is extracted out of the system together with the low boiling point substance from the top of the distillation column.
- the temperature of the heating source used is preferably 190 ° C or lower.
- SUS304, SUS316, and SUS316L are generally used as equipment materials.
- the bottom liquid contains bisphenol A, phenol, etc., and the phenol is distilled off by vacuum distillation to concentrate bisphenol A.
- concentration conditions there are no particular restrictions on the concentration conditions, but it is usually performed under conditions of a temperature of about 100 to 170 ° C and a pressure of about 5 to 70 kPa. If this temperature is lower than 100 ° C, a high vacuum is required, and if it is higher than 170 ° C, extra heat removal is required in the next crystallization process.
- the concentration of bis-phenol A in the concentrate is preferably from 20 to 50 weight 0/0, more preferably 20 to 40 wt% It is a range. If this concentration is less than 20% by mass, the recovery rate of bisphenol A is low, and if it exceeds 50% by mass, slurry transfer after crystallization may be difficult.
- the crystallization 'solid-liquid separation step is a 1: 1 adduct of bisphenol A and phenol (hereinafter sometimes referred to as phenol adduct crystal) from the concentrate obtained in the concentration step of step (C) above.
- Crystallization is the process of separation.
- the concentrated liquid is cooled to about 40 to 70 ° C. to crystallize phenol adduct crystals to form a slurry. Cooling at this time may be performed by using an external heat exchanger, or by a vacuum cooling crystallization method in which water is added to the concentrate and cooling is performed using the latent heat of vaporization of water under reduced pressure. May be.
- the crystallization temperature is less than 40 ° C, the viscosity of the crystallization solution may increase or solidify, and if it exceeds 70 ° C, the dissolution loss of bisphenol A increases.
- the slurry containing crystallized phenol adduct crystals is introduced onto a horizontal belt filter in a heated inert gas stream under reduced pressure to form a phenoladat crystal layer on the filter.
- the use of a horizontal belt filter is advantageous because filtration can be performed continuously and filtration can be performed without applying a large amount of gravity.
- the average particle diameter of the phenol adduct crystal is preferably about 0.05 to 1 mm. If the average particle size is less than 0.05 mm, it becomes difficult to separate the phenol adduct crystal from the mother liquor, resulting in clogging of the filter medium and a decrease in processing efficiency. If it is larger than 1 mm, the mother liquor containing impurities is taken into the crystal and the purity of the phenol adduct crystal is lowered.
- the liquid content of the phenol adduct crystal layer is reduced to 30% by mass or less, preferably 25% by mass or less.
- a horizontal belt filter In order to make it fall, however, it is preferable that the liquid content of the phenol adduct crystal layer is 30% by mass or less. Becomes smaller.
- the mother liquor and the phenol adduct crystal can be separated efficiently, and the liquid content of the phenol adduct crystal layer can be lowered.
- the pressure is reduced too much, the temperature of the mother liquor may be lowered and fine crystals may be generated, which may cause clogging of the filter cloth and promote trouble.
- a preferred degree of vacuum is about 60 to 95 kPa.
- the phenol adduct crystal layer can be adjusted by adjusting the degree of decompression and the belt speed of the horizontal belt filter.
- the liquid content can be reduced to 30% by mass or less. If phenol adduct crystals with a liquid content of 30% by mass or less are deposited on the horizontal belt filter, the thickness of the phenol adduct crystal layer is not limited, but if it is too thick, the mass per unit area increases. A burden is put on the device.
- the phenol adduct crystal layer Before the phenol adduct crystal layer is separated from the horizontal belt filter by its own weight, the phenol adduct crystal layer is contained in the phenol adduct crystal layer in order to remove as much impurities and trace amounts of acid catalyst as possible. It is preferable to wash with a cleaning solution.
- a cleaning solution phenol, water, a water-phenol mixture, or a solution in which bisphenol A is dissolved is used.
- the thickness of the phenol adduct crystal layer and the vacuum suction time can be adjusted by the belt speed. The slower the belt speed, the thicker the phenol adduct crystal layer deposited, but it can be exposed to reduced pressure for a longer time.
- the temperature needs to be 80 ° C or less, and the mother liquor and the washing solution may coagulate. It is important to keep the temperature of the atmosphere including the filter at about 30 to 80 ° C, preferably about 45 to 60 ° C.
- the separated mother liquor can be recycled to the crystallization step by isomerizing all or part of the mother liquor, which is wholly or partly recycled to the reactor. It is effective to repeat this (D) crystallization 'solid-liquid separation step multiple times in order to obtain a high purity product. sand In other words, after the crystallization, the following (D ') phenol adduct crystal dissolution, crystallization and solid-liquid separation steps were repeated one or more times for the phenol adduct crystal obtained by solid-liquid separation. (E) It is preferable to move to the heating and melting process.
- This step is a step of dissolving the phenol adduct crystal that has been crystallized and separated in step (D) using a phenol-containing solution.
- the phenol-containing solution used in this step is not particularly limited.
- step (D) the above phenol-containing solution is added to the phenol adduct crystal obtained in step (D), heated to about 80 to 110 ° C, and the phenol adduct crystal is heated and dissolved to perform crystallization operation.
- a bisphenol A-containing solution having a bisphenol A concentration is preferably prepared.
- bisphenol A-containing solution prepared is handled relatively low temperature time even lower viscosity is relatively easy, [this for filtering a horizontal belt filter; 1 ⁇ to 0
- the phenol adduct crystal is crystallized from the bisphenol-containing solution, and the phenol adduct crystal is further dissolved in the phenol-containing solution, and then crystallized in step (D). Repeat the operation one or more times.
- the washing liquid of the mother liquor that has been subjected to solid-liquid separation in this step may be reused as the adduct crystal washing liquid in the solid-liquid separator in the step (D), or the vacuum in step (D). It may be reused instead of water when evaporation crystallization is performed.
- the horizontal belt filter used in the present invention is processed into an endless shape, and the filter cloth is supported by applying tension with several rollers, and the filter cloth travels on the vacuum tray.
- the slurry is supplied to one end of the upper filter cloth to filter the phenol adduct crystals, and the cake of the obtained phenol adduct crystals is washed, and the cake is discharged by its own weight.
- thread made of thermoplastic resin fiber for example, polypropylene, polyester, nylon, polytetrafluoroethylene fiber Force that uses high-strength yarn or natural fiber strength, for example, a porous woven fabric woven with cotton, linen, or other yarn. Excellent polypropylene resistance, inexpensive and versatile polypropylene fiber strength.
- a filter cloth made of yarn is particularly preferred.
- the vacuum tray moves forward for about 15 seconds (the same direction as the direction of travel of the filter cloth) and moves backward (reverse to the direction of travel of the filter cloth) for about 5 seconds, and is built into the horizontal belt filter.
- a cake of phenol duct crystals with a thickness of several tens of millimeters is on the filter cloth, so that the friction between the filter cloth and the vacuum tray is always repeated ( refer graph1).
- the part if there is unevenness in the thread diameter of the filter cloth, the part swells and is locally rubbed and worn and broken, eventually breaking the filter cloth and stopping the bisphenol A production equipment. It will cause serious problems such as unavoidable.
- a filter cloth with densely woven yarn is selected, there is a problem that the air permeability is insufficient and the expected filtration performance cannot be exhibited.
- the filter cloth used in the present invention is a filter cloth having a long filter life and capable of exhibiting stable filtration performance.
- the filter cloth has a thermoplastic fiber-resin fiber strength with a uniform yarn diameter.
- the filter cloth has an air permeability of 50 to LOOml / cm 2 'sec (conforming to JIS L-1096), more preferably 65 to 75 ml Zcm 2 ⁇ sec.
- a filter cloth having an air permeability of less than 50 ml / cm 2 s will result in poor filter performance due to insufficient resistance of the filter cloth and insufficient gas flow.
- the filter cloth exceeds lOOmlZcm 2 s, the crystal that leaks the filter's eye force will gradually block the vacuum tray, obstructing the flow of filtrate and gas.
- a solvent such as phenol.
- a filter cloth having a uniform thread diameter with a deviation of the thread diameter of the filter cloth being ⁇ 0.1 mm or less For the weaving method of the filter cloth, two sanitary weave filter cloths with two warps and two wefts are preferred. A filter cloth made with a combination of two warp yarns and two weft yarns produces the running stability of the filter cloth with a horizontal belt filter (the wrinkle is prevented from meandering). And the strength of the filter cloth can be maintained. [0025]
- the horizontal belt filter used in the manufacture of bisphenol A is a large model, and the filter cloth attached to the large model that works is the length of the wide filter cloth with a filter cloth width of about 3-5m. In addition, it should be as long as 20 to 40 m, have the above-mentioned air permeability for obtaining high filtration performance, and be highly durable.
- a filter cloth woven with yarns having a warp diameter of 0.20 to 0.40 mm and a weft diameter of 0.6 to 0.8 mm is preferable as the filter cloth satisfying the forceful conditions.
- a filter cloth woven with a strong thread diameter can prevent wrinkles and maintain the strength while obtaining the necessary air permeability, and also has a filter cloth that does not have a problem in peelability from the phenol adduct crystal. Become. Note that the thread diameter is measured using a dial gauge.
- a filter cloth woven with a uniform thread diameter must be attached to a horizontal belt filter, and both ends of the filter cloth must be joined.
- the filter cloth is joined by a resin hook, a nickel alloy hook, a stainless steel hook, a fastener or the like.
- this joint is lacing). Part
- the removal of the hook may cause the wire to fall off, the filter cloth may come off, and the horizontal belt filter may become inoperable, causing serious problems leading to the stoppage of the bisphenol A production equipment.
- examples of the stainless steel hook include SUS316L and SUS316
- examples of the nickel alloy hook include Hastelloy (registered trademark) C (see FIG. 2).
- a gap of about 3 to 5 mm is generated in the racing portion of the filter cloth. Only the gas passes through the gap without the phenol adduct crystal cake. That is, the gas force that should contribute to the filtration of the phenol adduct crystal through the cake layer of the phenol adduct crystal passes through this gap, thereby reducing the filtration performance. For this reason, in order to improve the filtration performance of the filter cloth, it is possible to fill the gap by inserting a thread made of thermoplastic resin fiber, preferably a thread made of polypropylene fiber, into the gap of the lacing portion of the filter cloth. preferable.
- the heating and melting step is a step of heating and melting the phenol adduct crystal that has been crystallized and separated in the step (D) or (D ′).
- phenol adduct crystals are heated and melted to about 100 to 160 ° C. to form a liquid mixture.
- the phenol removal step is a step of recovering molten bisphenol A by distilling off phenol from the phenol adduct melt heated and melted in step (E) above by a vacuum distillation method.
- the above vacuum distillation is generally carried out under conditions of a pressure of about 1.3 to 13.3 kPa and a temperature of about 150 to 190 ° C. Residual phenol can be further removed by steam stripping.
- the molten bisphenol A obtained in the step (F) is formed into droplets by a granulator such as a spray dryer, and cooled and solidified to obtain a product.
- the droplets are formed by a method such as spraying or spraying, and cooled by nitrogen or air.
- the obtained slurry was placed in a casing under a nitrogen stream of 70 ° C, and moved at a traveling speed of 2 m / min !, and poured onto a horizontal belt filter made of polypropylene filter cloth.
- the phenol adduct crystal and the mother liquor were separated under reduced pressure over 5 seconds.
- the phenol adduct crystal separated from the mother liquor formed a cake layer having a thickness of 80 mm.
- washing ratio 0.75 was performed to remove the liquid and dry it, dropping it under its own weight from the folded end of the horizontal belt filter, and removing the wet phenol adduct. Crystals were obtained.
- the specification of the used polypropylene filter cloth is as follows.
- the air permeability is 70mlZ cm 2 'sec
- the warp yarn production standard is 0.28mm (deviation of thread diameter ⁇ 0.05mm)
- the weft production standard is 0.7mm (deviation of thread diameter ⁇ 0.5mm).
- a filter cloth with a width of 3.5m and a length of 30m made of 2 accepted wefts and made with Sugaya Woven, and a stainless steel (SUS316L) hook is driven into the filter cloth lacing part and joined with a stainless steel (SUS316) wire. did.
- a maley polypropylene hot melt adhesive was applied to the hooked portion of the filter cloth. Four polypropylene threads were inserted into the filter cloth lacing section to fill the gap.
- the specifications and operating conditions of the filter cloth were the same as in Example 1 except that a filter cloth having an air permeability of 40 mlZcm 2 'sec was used.
- Example 2 The same procedure as in Example 1 was performed except that a filter cloth having an air permeability of 150 mlZcm 2 ⁇ sec was used.
- the filter cloth specification is a filter cloth woven with non-uniform yarn diameters of warp yarn production standard 0.28 mm (yarn diameter deviation ⁇ 0.2 mm) and weft production standard 0.7 mm (yarn diameter deviation ⁇ 0.4 mm). The same operation as in Example 1 was carried out except that it was used.
- Example 2 The specifications for the filter cloth and the operating status of the equipment are the same as in Example 1, except that the maleated polypropylene hot melt adhesive is not applied to the hooked portion of the filter cloth. Carried out.
- the specifications of the filter cloth and the operation status of the apparatus were the same as in Example 1 except that the filter cloth specification was not performed by inserting a yarn having polypropylene fiber strength into the filter cloth lacing part.
- Example 1 the filtration performance was such that the liquid content of the wet phenol adduct crystals was 25% by mass, and the concentration of the 2,4 isomer in the obtained swollen phenol adduct crystals was 0%. It was 10% by mass, and continuous operation was possible for one year.
- Example 2 Apply malei polypropylene hot melt adhesive to the hooked part of the filter cloth.
- the filtration performance was as follows.
- the liquid content of the wet phenol adduct crystal was 26% by mass, and the concentration of the 2,4-isomer in the obtained swelling adduct was 0.11% by mass.
- Continuous operation was possible for one year.
- the filter cloth does not break for one year.
- the wear of the cloth cloth is uniform. At the end of one year of operation, a part of the stainless steel hook of the racing part was dropped.
- Example 3 in which a yarn having polypropylene fiber strength was not inserted in the filter cloth lacing part, the filtration performance was 27% by weight of the wet phenol adduct crystal, and the resulting expanded phenol adduct crystal was obtained.
- the concentration of the 2, 4-isomer was 0.12% by mass, and the filter cloth could be operated continuously for one year. The filter cloth did not tear for one year. The wear of the cloth was uniform, and the stainless steel hooks were not removed.
- Example 1 In Comparative Example 1 using a filter cloth having an air permeability of 40 ml / cm 2 s, the resistance of the filter cloth was large and the gas flow rate was insufficient. As a result, the liquid content of the wet phenol adduct crystal was 35%. In mass%, the filtration performance of Example 1 was far below 25% by mass, and the concentration of 2,4-isomer in the obtained swollen phenol adduct crystal was 0.17% by mass. It was 1.7 times as much.
- Comparative Example 3 which used a filter cloth woven with non-uniform yarn diameters, the filter cloth was severely torn at the point when 6 months had passed since the start of operation, and the operation could not be continued.
- the production apparatus of Nord A was stopped and the filter cloth was changed.
- Inspecting filter cloth for wear The diameter of a part of the weft that has a uniform yarn diameter is extremely larger than the diameter of the surrounding weft, and this thick part wears the warp due to local friction, resulting in tearing. , It expanded at a stretch and led to a big tear.
- the filter cloth with the same specifications was attached again and the operation was resumed. After 6 months, the system was stopped and the filter cloth was checked.
- the filter cloth having a long filter cloth life and capable of exhibiting stable filtration performance is mounted.
- a method for producing bisphenol A using a horizontal belt filter can be provided.
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
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Abstract
Description
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2007800094219A CN101405248B (zh) | 2006-03-16 | 2007-02-15 | 双酚a的制备方法 |
EP07714254.5A EP1995230B1 (en) | 2006-03-16 | 2007-02-15 | Process for producing bisphenol a |
KR1020087021384A KR101342433B1 (ko) | 2006-03-16 | 2008-09-01 | 비스페놀 a의 제조 방법 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2006-073385 | 2006-03-16 | ||
JP2006073385A JP5184751B2 (ja) | 2006-03-16 | 2006-03-16 | ビスフェノールaの製造方法 |
Publications (1)
Publication Number | Publication Date |
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WO2007108259A1 true WO2007108259A1 (ja) | 2007-09-27 |
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PCT/JP2007/052724 WO2007108259A1 (ja) | 2006-03-16 | 2007-02-15 | ビスフェノールaの製造方法 |
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Country | Link |
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EP (1) | EP1995230B1 (ja) |
JP (1) | JP5184751B2 (ja) |
KR (1) | KR101342433B1 (ja) |
CN (1) | CN101405248B (ja) |
RU (1) | RU2424223C2 (ja) |
TW (1) | TW200745005A (ja) |
WO (1) | WO2007108259A1 (ja) |
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EP2404650A1 (de) * | 2010-07-09 | 2012-01-11 | Bayer MaterialScience AG | Vorrichtung und Verfahren zur Fest-/Flüssig-Trennung von Fest-Flüssig-Suspensionen |
WO2018225014A1 (en) * | 2017-06-07 | 2018-12-13 | Sabic Global Technologies B.V. | Rotary vacuum filter, method, and use |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0725798A (ja) * | 1993-07-08 | 1995-01-27 | Idemitsu Petrochem Co Ltd | 高純度ビスフェノールaの製造方法 |
JPH0747209A (ja) | 1993-08-06 | 1995-02-21 | Tsukishima Kikai Co Ltd | 濾過機における洗浄方法 |
WO2004020377A1 (ja) * | 2002-08-28 | 2004-03-11 | Idemitsu Kosan Co., Ltd. | ビスフェノールaの製造方法 |
JP2004137197A (ja) | 2002-10-17 | 2004-05-13 | Idemitsu Petrochem Co Ltd | ビスフェノールaの製造方法 |
JP2004359594A (ja) * | 2003-06-04 | 2004-12-24 | Idemitsu Petrochem Co Ltd | ビスフェノールaの製造方法 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19961521A1 (de) * | 1999-12-20 | 2001-06-21 | Bayer Ag | Bisphenol-Phenol-Addukte |
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2007
- 2007-02-15 WO PCT/JP2007/052724 patent/WO2007108259A1/ja active Application Filing
- 2007-02-15 EP EP07714254.5A patent/EP1995230B1/en not_active Not-in-force
- 2007-02-15 CN CN2007800094219A patent/CN101405248B/zh active Active
- 2007-02-15 RU RU2008140945/04A patent/RU2424223C2/ru active
- 2007-03-09 TW TW096108309A patent/TW200745005A/zh unknown
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Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0725798A (ja) * | 1993-07-08 | 1995-01-27 | Idemitsu Petrochem Co Ltd | 高純度ビスフェノールaの製造方法 |
JPH0747209A (ja) | 1993-08-06 | 1995-02-21 | Tsukishima Kikai Co Ltd | 濾過機における洗浄方法 |
WO2004020377A1 (ja) * | 2002-08-28 | 2004-03-11 | Idemitsu Kosan Co., Ltd. | ビスフェノールaの製造方法 |
JP2004137197A (ja) | 2002-10-17 | 2004-05-13 | Idemitsu Petrochem Co Ltd | ビスフェノールaの製造方法 |
JP2004359594A (ja) * | 2003-06-04 | 2004-12-24 | Idemitsu Petrochem Co Ltd | ビスフェノールaの製造方法 |
Non-Patent Citations (1)
Title |
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See also references of EP1995230A4 * |
Also Published As
Publication number | Publication date |
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JP2007246452A (ja) | 2007-09-27 |
CN101405248B (zh) | 2012-02-15 |
TW200745005A (en) | 2007-12-16 |
CN101405248A (zh) | 2009-04-08 |
KR101342433B1 (ko) | 2013-12-17 |
EP1995230B1 (en) | 2013-04-10 |
RU2424223C2 (ru) | 2011-07-20 |
TWI372746B (ja) | 2012-09-21 |
EP1995230A4 (en) | 2011-01-26 |
EP1995230A1 (en) | 2008-11-26 |
JP5184751B2 (ja) | 2013-04-17 |
KR20080102381A (ko) | 2008-11-25 |
RU2008140945A (ru) | 2010-04-27 |
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