Process for producing bisphenol A
US6784324B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 11, 2003 |
| Grant date | Aug 31, 2004 |
| Priority date | — |
| Expiry date | Jun 11, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2231/347
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
There is disclosed a method of producing bisphenol A, in which bisphenol A is produced by condensation of phenol and acetone with the use of a cation exchange resin as a catalyst and a free mercaptan as a promoter, comprising feeding phenol and acetone to a multi-stage reactor in which at least two fixed bed-type adiabatic reactors packed with the cation exchange resin are arranged in series and a heat exchanger is provided at an inlet of each of the reactors, and controlling the temperature within each of the reactors so as not to exceed 90° C.With this method, elimination of sulfonic groups from the cation exchange resin as a catalyst can be suppressed, so that bisphenol A of high quality can be obtained, and the amount of the catalyst used can be reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.