Recovering values from heavy ends in bisphenol-A production
US5300702A · kind A · utility
4Cited by
6References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 1, 1993 |
| Grant date | Apr 5, 1994 |
| Priority date | — |
| Expiry date | Mar 1, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C39/16
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
In the production of bisphenol-A from the reaction of phenol and acetone, values are recovered from a "heavy ends" fraction by passing the fraction through a thin-film evaporator, making a light fraction which is fractionally distilled into three portions, two of which have recoverable proportions of bisphenol-A, and recovering bisphenol-A from at least one of them.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.