Catalytic/co-catalytic production of bisphenol A
US5105027A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 1991 |
| Grant date | Apr 14, 1992 |
| Priority date | — |
| Expiry date | Feb 28, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J27/138
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Bisphenol A is prepared by condensing a stoichiometric excess of phenol with acetone in the presence of (a) a catalytically effective amount of an acid catalyst, e.g., benzenesulfonic acid, and (b) a co-catalytically effective amount of a functional polymer characteristically having the formula: ##STR1## in which m is 0 or 1, n is 0 or 1, p is 0 or 1, R.sup.1, R.sup.2 and R.sup.3, which may be identical or different, are each a hydrogen atom, a C.sub.1 -C.sub.6 alkyl radical or a phenyl radical optionally substituted by 1 or 2 hydroxyl or C.sub.1 -C.sub.4 alkoxy groups, and R.sup.4 is a hydrogen atom, a halogen atom, a C.sub.1 -C.sub.6 alkyl radical, or one of the groups: --CHO, --NO.sub.2, --CO.sub.2 H, --CO.sub.2 R.sup.5 wherein R.sup.5 is a C.sub.1 -C.sub.4 alkyl radical, or ##STR2## is the residue of a chloromethylated resin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.