Recovery of phenol and acetone from bisphenol-A streams
US8431749B2 · kind B2 · utility
2Cited by
2References
15Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 6, 2011 |
| Grant date | Apr 30, 2013 |
| Priority date | — |
| Expiry date | Oct 4, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C37/70
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
In a method of recovering phenol and acetone from a feed stream containing bisphenol-A and isomers thereof, the feed stream is contacted with water and a source of hydroxyl ions under conditions effective to decompose at least part of said bisphenol-A and isomers thereof to phenol and acetone. The conditions include a temperature of about 150° C. to about 300° C., a pressure sufficient to keep the water substantially in the liquid phase at said temperature, and a molar ratio of hydroxyl ions to hydroxyphenyl groups in the residue stream from about 0.3:1 to about 0.9:1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.