WO2003055601A1 - Catalyst for bisphenol compound production and process for producing bisphenol compound with the catalyst - Google Patents
Catalyst for bisphenol compound production and process for producing bisphenol compound with the catalyst Download PDFInfo
- Publication number
- WO2003055601A1 WO2003055601A1 PCT/JP2002/013545 JP0213545W WO03055601A1 WO 2003055601 A1 WO2003055601 A1 WO 2003055601A1 JP 0213545 W JP0213545 W JP 0213545W WO 03055601 A1 WO03055601 A1 WO 03055601A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- exchange resin
- catalyst
- reaction
- ion
- ion exchange
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
- B01J31/06—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides containing polymers
- B01J31/08—Ion-exchange resins
- B01J31/10—Ion-exchange resins sulfonated
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07B—GENERAL METHODS OF ORGANIC CHEMISTRY; APPARATUS THEREFOR
- C07B61/00—Other general methods
-
- 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
- C07C37/11—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring by reactions increasing the number of carbon atoms
- C07C37/20—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring by reactions increasing the number of carbon atoms using aldehydes or ketones
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2231/00—Catalytic reactions performed with catalysts classified in B01J31/00
- B01J2231/30—Addition reactions at carbon centres, i.e. to either C-C or C-X multiple bonds
- B01J2231/34—Other additions, e.g. Monsanto-type carbonylations, addition to 1,2-C=X or 1,2-C-X triplebonds, additions to 1,4-C=C-C=X or 1,4-C=-C-X triple bonds with X, e.g. O, S, NH/N
- B01J2231/341—1,2-additions, e.g. aldol or Knoevenagel condensations
- B01J2231/347—1,2-additions, e.g. aldol or Knoevenagel condensations via cationic intermediates, e.g. bisphenol A type processes
Definitions
- Patent application title Catalyst for producing bisphenols and method for producing bisphenols using the catalyst
- the present invention relates to a catalyst for producing bisphenols and a method for producing bisphenols using the catalyst. More specifically, the present invention relates to a catalyst for producing bisphenols having high activity, heavy physical resistance and alcohol resistance, and the catalyst. And a method for producing bisphenols using the same. Background art
- Bisphenol A 2,2-bis (4-hydroxyphenyl) propane
- Bisphenol A is known to be an important compound as a raw material for engineering plastics such as polycarbonate resin and polyarylate resin, or epoxy resin.
- the demand has been increasing.
- bisphenols such as bisphenol A are produced by reacting phenols with ketones using an acidic cation exchange resin as a catalyst.
- it is also known to modify the acidic cation-exchange resin of the catalyst with a nitrogen-containing sulfur compound in order to increase the activity of the catalyst (Japanese Patent Application Laid-Open Nos. 57-35533, 1979; 6-3405 63, Japanese Patent Application Laid-Open No. H10-2511179).
- the present invention has been made in view of the above, and provides a catalyst for producing bisphenols having high activity, heavy physical properties and alcohol resistance, and a method for producing bisphenols using the catalyst. Disclosure of the invention
- the present inventors have found that the object of the present invention can be effectively achieved by combining a specific nitrogen-containing sulfur compound as a modifying agent, and have completed the present invention.
- the gist of the present invention is as follows.
- a catalyst for producing bisphenols obtained by modifying a sulfonic acid type cation exchange resin with (a) pyridinealkanethiols and (b) aminoalkanethiols and z or thiazolidine.
- a process for producing bisphenols which comprises reacting phenols with ketones in the presence of the catalyst for producing bisphenols according to any one of 1 to 4 above.
- the sulfonic acid type cation exchange resin comprises (a) pyridinealkanethiols (also referred to as mercaptoalkylpyridines) and (b) aminoalkanethiols (also referred to as mercaptoalkylamines) and Z or It is a catalyst for producing bisphenols modified with thiazolidines.
- the second invention is a method for producing bisphenols, which comprises reacting phenols with ketones in the presence of the above catalyst for producing bisphenols.
- the sulfonic acid type cation exchange resin (hereinafter sometimes abbreviated as ion exchange resin) is used as a base resin in a styrene-dibutylbenzene copolymer system, a perfluoroethylene copolymer system, Although there are a nor-formaldehyde polymer system and the like, a styrene-dibutylbenzene copolymer system is preferable. These resins can be used in either a gel type or a porous type, but the degree of crosslinking is preferably relatively low, for example, 2 to 8%.
- the ion exchange resin has an average particle size in the range of 0.2 to 2.0 mm and a uniform particle size distribution of 1.0 to 1.6. .
- the modifying agent for modifying the ion exchange resin is the above-mentioned component (a) and component (b).
- pyridine alkanethiols of the component (a) for example, 2-mercaptomethylpyridine, 3-mercaptomethylpyridine, 2-mercaptoethylpyridine, 3-mercaptoethylpyridine, 4-menolecaptoethylpyridine and hydrochloric acid thereof Salts and the like can be mentioned. Among them, 4-mercaptoethylpyridine or its hydrochloride is preferred.
- examples of the aminoalkanethiols include 2-mercaptoethylamine, 3-mercaptopropylamine, 4-mercaptobutylamine, and hydrochlorides thereof. Among them, 2 Monomercaptoethylamine or its hydrochloride salt is preferred.
- thiazolidines for example, 2,2-dimethylthiazolidine, 2-methyl-2-ethylthiazolidine, cycloalkylthiazolidine, 2-methyl-2-phenylthiazolidine, 3-methylthiazolidine and the like can be mentioned. Among them, 2,2-dimethylthiazolidin is preferable.
- the method of modifying the ion exchange resin is to dissolve the modifier in a solvent in which the modifier dissolves, for example, water, alcohols, ethers, etc., and slowly add to the unmodified ion exchange resin previously dispersed in the same solvent (2 (0 minute to 1 hour).
- the reaction can be performed uniformly with stirring (to convert the sulfone group into a modified group uniformly), but for a more uniform reaction, the reaction can be performed in an aqueous solvent containing acetic acid, monochloroacetic acid, and trifluoroacetic acid. Just do it.
- a plurality of modifiers may be used simultaneously or separately and sequentially.
- the reaction temperature may be room temperature or heating (30 to 90).
- the modification ratio by the component (a) is 3 to 35% (preferably 5 to 30%), and the modification ratio by the component (b) is 5 to 52% (preferably 5 to 52%). 330%) and the total denaturation rate may be 8 855% (preferably 10 ⁇ 45%).
- bisphenols are produced by reacting phenols with ketones using the modified ion exchange resin as a catalyst.
- phenols have no substituent at the para-position to the hydroxyl group.
- phenols such as phenol, o-cresol, ⁇ -cresol, o-tert-ptinolephenol / le, 2,6-xylenol / le, and 2,6-di-tert-butylphenol Phenol or o-chlorophenol
- norogeni-dani phenols such as phenol, m-chlorophenol and 2,6-dichlorophenol.
- ketones include ketones such as acetone, methyl / retinole ketone, methyl isobutyl ketone, methyl-n-propyl ketone, acetophenonone, cyclohexanone, and aldehydes such as formalin, acetaldehyde, and benzaldehyde. Can be mentioned.
- the above reaction method is not particularly limited, but a fixed bed continuous reaction or a batch reaction is preferable.
- the liquid hourly space velocity (LHSV) is usually 0.1 to 30 hr- 1 and preferably 0.3 to 10 hr- 1 .
- the ratio of phenols to ketones is usually in the range of 3 to 30, preferably 5 to 15, phenols / ketones (molar ratio).
- the reaction temperature is usually in the range of 50 to 150, preferably 60 to 110.
- the method of the present invention can be suitably applied to the production of bisphenol A using acetone and phenol as raw materials.
- the alcohol (90% by mass or more of methanol) present in acetone is preferably not more than 3,000 ppm, particularly preferably not more than 2,000 ppm, in consideration of catalyst deterioration.
- ion exchange resin Mitsubishi Chemical Corp., trade name: Diaion SK-104
- 40 cc of methanol are stirred while suspended.
- a solution consisting of 2.7 g and 50 cc of methanol was added dropwise over a period of 30 minutes, and 4-mercaptoethylpyridine (also referred to as 4-pyridineethanethiol, sometimes abbreviated as PET) was added.
- PET 4-mercaptoethylpyridine
- the mixture was further stirred for 1 hour, and then the ion-exchange resin was filtered and separated by washing twice with 100 cc of ion-exchanged water.
- the mixture was further stirred for 1 hour, and then the ion-exchange resin was filtered and separated by washing twice with 100 cc of ion-exchanged water. After drying a part of the separated ion exchange resin, the acid content was determined by titration, and it was found that 15% of the acid sites were denatured (neutralized). Therefore, it was found that the denaturation rate by DMT was 7%.
- the above-mentioned PET-modified ion exchange resin (water swelling) 69 cc was packed in a stainless steel column and reacted under the same conditions as in Example 1.
- the above DMT-modified ion exchange resin (water swelling) 69 cc was packed in a stainless steel column and reacted under the same conditions as in Example 1.
- ion-exchange resin Mitsubishi Chemical Corporation, trade name: Diaion SK-104.
- 2-mercaptoethylamine also referred to as 2-aminoethanethiol, sometimes abbreviated as AET
- AET 2-aminoethanethiol
- the mixture was further stirred for 1 hour, and then the ion-exchange resin was filtered off and washed twice with 100 cc of ion-exchanged water for separation. After drying a part of the separated ion exchange resin, the acid content was determined by titration. As a result, it was found that 10% of the acid sites were modified by AET.
- a solution consisting of 5.0 g of PET and 50 cc of methanol was added for 30 minutes. It dripped over.
- the mixture was further stirred for 1 hour, and then the ion-exchange resin was filtered and washed twice with 100 cc of ion-exchanged water for separation. After drying a part of the separated ion exchange resin, the acid content was determined by titration. As a result, it was found that 25% of the acid sites had been modified. Therefore, the denaturation rate by PET was found to be 15%.
- the above AETZPET denatured ion exchange resin (water swell) 69 cc was packed in a stainless steel column, 75 l, LHS V; 6 hr- 1 [acetone 15 cc / r (methanol concentration in acetone 1, OOO ppm), phenol 2 77 cc / r].
- the reaction results are calculated as follows: The conversion of phenol was 11.7%, the conversion of phenol 400 hours after the start of the reaction was 10.1%, and the rate of reduction of the phenol conversion was 1.6% / 400 hr.
- Example 2 In the same manner as in Example 2, except that the ion exchange resin was modified only with AET. The modification ratio of the ion exchange resin was 10%.
- the above AET-modified ion exchange resin (water swell) 69 cc was packed in a stainless steel column and reacted under the same conditions as in Example 2.
- Example 3 was carried out in the same manner as in Example 3, except that the ion exchange resin was modified only with PET.
- the modification ratio of the ion exchange resin was 20%.
- the above-mentioned PET-modified ion exchange resin (water swelling) 69 cc was packed in a stainless steel column and reacted under the same conditions as in Example 3.
- the above DMT-modified ion exchange resin (water swelling) 69 cc was packed in a stainless steel column and reacted under the same conditions as in Example 3.
- the above-mentioned PET / DMT denatured ion exchange resin (water swell) 69 cc was packed in a stainless steel column, and 753 ⁇ 4, LHSV; 6 hr 1 [acetone 15 cc / hr (methanol concentration in acetone 2, OOO ppm), phenol 277 cc / r].
- the reaction results are calculated as follows: The conversion of phenol was 10.8%, the conversion of phenol 400 hours after the start of the reaction was 8.7%, and the rate of reduction of the phenol conversion was 2.1% / 400 hr.
- the above DMT-modified ion exchange resin (water swelling) 69 cc was packed in a stainless steel column and reacted under the same conditions as in Example 4.
- Example 5 was carried out in the same manner as in Example 5, except that the ion exchange resin was modified only with PET.
- the modification ratio of the ion exchange resin was 10%.
- the above-mentioned PET-modified ion exchange resin (water swelling) 69 cc was packed in a stainless steel column and reacted under the same conditions as in Example 5.
- the acid content was determined by titration, and it was found that 15% of the acid sites had been modified by AET.
- an aqueous solution consisting of 4.2 g of DMT and 50 cc of ion-exchanged water was added thereto. It was dropped over 30 minutes.
- the mixture was further stirred for 1 hour, and then the ion-exchange resin was filtrated and separated by washing twice with 100 cc of ion-exchanged water.
- the acid content was determined by titration. As a result, it was found that 30% of the acid sites had been denatured. Therefore, the denaturation rate by DMT was found to be 15%.
- An AET-modified ion exchange resin was prepared in the same manner as in Comparative Example 14, except that the ion exchange resin was modified only with AET. The denaturation rate was 15%.
- a DMT-modified ion-exchange resin was prepared in the same manner as in Comparative Example 14 except that the ion-exchange resin was modified only with DMT. The modification rate was 15%.
- Comparative Example PET modified ion-exchange resin prepared in 13 (water-swollen) 50 cc, above AET modified ion exchange resin (water-swollen) 25 c c ⁇ 25 25 cc of the above DMT-modified ion exchange resin (water swelling) was suspended in 200 cc of ion exchange water and stirred for 20 minutes. 2 Reaction
- a stainless steel column was filled with 69 cc of a mixture of the above PET-modified ion exchange resin (water swelling), AET-modified ion exchange resin (water swelling) and DMT-modified ion exchange resin (water swelling), and reacted under the same conditions as in Example 5.
- Table 1 summarizes the catalysts
- Table 2 summarizes the reaction results.
- PET 4-pyridineethanethiol DMT: 2, 2-dimethylthiazolidine AET: 2-aminoequnethiol Table 2
- the present invention it is possible to provide a catalyst for producing bisphenols having high activity, heavy physical properties and alcohol resistance, and a method for producing bisphenols using the catalyst.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Catalysts (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2003-7011221A KR20040068459A (ko) | 2001-12-27 | 2002-12-25 | 비스페놀류 제조용 촉매 및 이 촉매를 사용한비스페놀류의 제조방법 |
| US10/468,152 US6825386B2 (en) | 2001-12-27 | 2002-12-25 | Catalyst for bisphenol compound production and process for producing bisphenol compound with the catalyst |
| EP02791995A EP1459805A1 (en) | 2001-12-27 | 2002-12-25 | Catalyst for bisphenol compound production and process for producing bisphenol compound with the catalyst |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001395778A JP4050053B2 (ja) | 2001-12-27 | 2001-12-27 | ビスフェノール類製造用触媒及び該触媒を用いるビスフェノール類の製造方法 |
| JP2001-395778 | 2001-12-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2003055601A1 true WO2003055601A1 (en) | 2003-07-10 |
Family
ID=19189025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2002/013545 Ceased WO2003055601A1 (en) | 2001-12-27 | 2002-12-25 | Catalyst for bisphenol compound production and process for producing bisphenol compound with the catalyst |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US6825386B2 (ja) |
| EP (1) | EP1459805A1 (ja) |
| JP (1) | JP4050053B2 (ja) |
| KR (1) | KR20040068459A (ja) |
| CN (1) | CN1239264C (ja) |
| MY (1) | MY122944A (ja) |
| TW (1) | TWI256318B (ja) |
| WO (1) | WO2003055601A1 (ja) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7112702B2 (en) | 2002-12-12 | 2006-09-26 | General Electric Company | Process for the synthesis of bisphenol |
| US7132575B2 (en) | 2003-07-01 | 2006-11-07 | General Electric Company | Process for the synthesis of bisphenol |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4147202B2 (ja) * | 2003-09-30 | 2008-09-10 | 三井化学株式会社 | 改質酸性イオン交換樹脂触媒およびそれを用いたビスフェノール類の製造方法 |
| CN100546720C (zh) * | 2004-07-02 | 2009-10-07 | 三井化学株式会社 | 改性离子交换树脂和双酚类的制造方法 |
| US7923586B2 (en) * | 2005-01-28 | 2011-04-12 | Dow Global Technologies Llc | Method for stabilizing a cation exchange resin prior to use as an acid catalyst and use of said stabilized cation exchange resin in a chemical process |
| US20120283485A1 (en) * | 2011-05-02 | 2012-11-08 | Umesh Krishna Hasyagar | Robust promoter catalyst system |
| US8735634B2 (en) * | 2011-05-02 | 2014-05-27 | Sabic Innovative Plastics Ip B.V. | Promoter catalyst system with solvent purification |
| US9290618B2 (en) | 2011-08-05 | 2016-03-22 | Sabic Global Technologies B.V. | Polycarbonate compositions having enhanced optical properties, methods of making and articles comprising the polycarbonate compositions |
| WO2013116697A1 (en) | 2012-02-03 | 2013-08-08 | Sabic Innovative Plastics Ip B.V. | Light emitting diode device and method for production thereof containing conversion material chemistry |
| WO2013130610A1 (en) | 2012-02-29 | 2013-09-06 | Sabic Innovative Plastics Ip B.V. | Polycarbonate compositions containing conversions material chemistry and having enhanced optical properties, methods of making and articles comprising the same |
| CN104144902A (zh) | 2012-02-29 | 2014-11-12 | 沙特基础创新塑料Ip私人有限责任公司 | 用于生产低硫双酚a的方法、用于生产聚碳酸酯的方法以及由聚碳酸酯制作的制品 |
| US9346949B2 (en) | 2013-02-12 | 2016-05-24 | Sabic Global Technologies B.V. | High reflectance polycarbonate |
| US9821523B2 (en) | 2012-10-25 | 2017-11-21 | Sabic Global Technologies B.V. | Light emitting diode devices, method of manufacture, uses thereof |
| US9553244B2 (en) | 2013-05-16 | 2017-01-24 | Sabic Global Technologies B.V. | Branched polycarbonate compositions having conversion material chemistry and articles thereof |
| EP3004234B1 (en) | 2013-05-29 | 2021-08-18 | SABIC Global Technologies B.V. | Illuminating devices with color stable thermoplastic light-transmitting articles |
| US20150353660A1 (en) * | 2014-06-05 | 2015-12-10 | Lanxess Deutschland Gmbh | Process for preparing catalysts |
| US10851230B2 (en) | 2015-12-09 | 2020-12-01 | Ptt Global Chemical Public Company Limited | Ion exchange resin for producing bisphenol, and a method for producing bisphenol using said ion exchange resin |
| US10005709B2 (en) | 2016-05-10 | 2018-06-26 | Sabic Global Technologies B.V. | Method for producing a Bisphenol |
| KR102479147B1 (ko) * | 2018-10-26 | 2022-12-20 | 주식회사 엘지화학 | 질소 화합물 및 중금속 이온을 포함하는 용액으로부터 질소 및 중금속 이온을 제거하는 방법 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11246458A (ja) * | 1998-02-26 | 1999-09-14 | Mitsubishi Chemical Corp | ビスフェノールの製造方法 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3394089A (en) * | 1964-12-02 | 1968-07-23 | Dow Chemical Co | Ion exchange catalyst for the preparation of bisphenols |
| US3634341A (en) * | 1970-03-06 | 1972-01-11 | Dow Chemical Co | Ion exchange catalysts for the preparation of bisphenols |
| US4423252A (en) * | 1980-08-07 | 1983-12-27 | Mitsubishi Chemical Industries Limited | Process for preparing bisphenols |
| JP4093655B2 (ja) | 1998-10-22 | 2008-06-04 | 出光興産株式会社 | ビスフェノールaの製造法 |
| WO2001049640A1 (fr) | 2000-01-07 | 2001-07-12 | Idemitsu Petrochemical Co., Ltd. | Procede de production de bisphenol a |
| JP2001199919A (ja) | 2000-01-18 | 2001-07-24 | Idemitsu Petrochem Co Ltd | ビスフェノールaの製造方法 |
-
2001
- 2001-12-27 JP JP2001395778A patent/JP4050053B2/ja not_active Expired - Fee Related
-
2002
- 2002-12-20 TW TW091136879A patent/TWI256318B/zh not_active IP Right Cessation
- 2002-12-23 MY MYPI20024854A patent/MY122944A/en unknown
- 2002-12-25 CN CNB028055993A patent/CN1239264C/zh not_active Expired - Fee Related
- 2002-12-25 KR KR10-2003-7011221A patent/KR20040068459A/ko not_active Abandoned
- 2002-12-25 EP EP02791995A patent/EP1459805A1/en not_active Withdrawn
- 2002-12-25 WO PCT/JP2002/013545 patent/WO2003055601A1/ja not_active Ceased
- 2002-12-25 US US10/468,152 patent/US6825386B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11246458A (ja) * | 1998-02-26 | 1999-09-14 | Mitsubishi Chemical Corp | ビスフェノールの製造方法 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7112702B2 (en) | 2002-12-12 | 2006-09-26 | General Electric Company | Process for the synthesis of bisphenol |
| US7132575B2 (en) | 2003-07-01 | 2006-11-07 | General Electric Company | Process for the synthesis of bisphenol |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI256318B (en) | 2006-06-11 |
| EP1459805A1 (en) | 2004-09-22 |
| MY122944A (en) | 2006-05-31 |
| TW200301159A (en) | 2003-07-01 |
| JP2003190805A (ja) | 2003-07-08 |
| KR20040068459A (ko) | 2004-07-31 |
| CN1239264C (zh) | 2006-02-01 |
| CN1494457A (zh) | 2004-05-05 |
| US20040127753A1 (en) | 2004-07-01 |
| US6825386B2 (en) | 2004-11-30 |
| JP4050053B2 (ja) | 2008-02-20 |
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