JPS57142936A - Purifying method of bisphenol a - Google Patents
Purifying method of bisphenol aInfo
- Publication number
- JPS57142936A JPS57142936A JP2806381A JP2806381A JPS57142936A JP S57142936 A JPS57142936 A JP S57142936A JP 2806381 A JP2806381 A JP 2806381A JP 2806381 A JP2806381 A JP 2806381A JP S57142936 A JPS57142936 A JP S57142936A
- Authority
- JP
- Japan
- Prior art keywords
- bpa
- bisphenol
- contact
- water
- discoloration
- 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.)
- Pending
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
PURPOSE: To obtain the titled crystals with a low degree of discoloration having improved transparency by simple operations, by purifying crude bisphenol A prepared from phenol and acetone in the presence of an acidic catalyst by using Na2S2O4 in a molten state in contact with water.
CONSTITUTION: Phenol is reacted with acetone in the presence of an acidic catalyst to give crude bisphenol A, which is in a molten state brought into contact with water under ordinary pressure at 95°C or above in the presence of Na2S2O4 (sodium dithionite) and purified. The resultant mixture is then cooled to 95°C or below at ordinary pressure to deposit bisphenol A (abbreviated to BPA) and give crystals of BPA with a low degree of discoloration. The amount of water to be used for the contact treatment is 1W5pts.wt. based on BPA. The amount of Na2S2O4 is 0.1W1pt.wt. based on BPA.
USE: A raw material for polycarbonate, epoxy resins, etc.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2806381A JPS57142936A (en) | 1981-02-27 | 1981-02-27 | Purifying method of bisphenol a |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2806381A JPS57142936A (en) | 1981-02-27 | 1981-02-27 | Purifying method of bisphenol a |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57142936A true JPS57142936A (en) | 1982-09-03 |
Family
ID=12238300
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2806381A Pending JPS57142936A (en) | 1981-02-27 | 1981-02-27 | Purifying method of bisphenol a |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57142936A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4507509A (en) * | 1984-01-04 | 1985-03-26 | General Electric Company | Purification of bisphenol-A |
US5202505A (en) * | 1992-03-24 | 1993-04-13 | Hoechst Celanese Corporation | Purification of hydroxyphenyl alkanes |
US5756781A (en) * | 1995-09-29 | 1998-05-26 | General Electric Company | Method for making tris(hydroxyphenyl) compounds using ion exchange |
JPH10236998A (en) * | 1996-12-16 | 1998-09-08 | General Electric Co <Ge> | Production of 1,1,1-tris(4-hydroxyphenyl)ethane |
JPH111448A (en) * | 1996-01-05 | 1999-01-06 | General Electric Co <Ge> | Preparation and purification of 1,1,1-tris(4-hydroxyphenyl) ethane |
JP2015179033A (en) * | 2014-03-19 | 2015-10-08 | 三菱化学株式会社 | Evaluation method of phenol color tone |
-
1981
- 1981-02-27 JP JP2806381A patent/JPS57142936A/en active Pending
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4507509A (en) * | 1984-01-04 | 1985-03-26 | General Electric Company | Purification of bisphenol-A |
US5202505A (en) * | 1992-03-24 | 1993-04-13 | Hoechst Celanese Corporation | Purification of hydroxyphenyl alkanes |
US5756781A (en) * | 1995-09-29 | 1998-05-26 | General Electric Company | Method for making tris(hydroxyphenyl) compounds using ion exchange |
JPH111448A (en) * | 1996-01-05 | 1999-01-06 | General Electric Co <Ge> | Preparation and purification of 1,1,1-tris(4-hydroxyphenyl) ethane |
JPH10236998A (en) * | 1996-12-16 | 1998-09-08 | General Electric Co <Ge> | Production of 1,1,1-tris(4-hydroxyphenyl)ethane |
JP2015179033A (en) * | 2014-03-19 | 2015-10-08 | 三菱化学株式会社 | Evaluation method of phenol color tone |
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