Method of reducing methanol in recycle streams in bisphenol-A production process
US8143456B2 · kind B2 · utility
5Cited by
4References
16Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 22, 2008 |
| Grant date | Mar 27, 2012 |
| Priority date | — |
| Expiry date | Dec 9, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C29/80
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Methods for removing methanol from acetone recycle streams during bisphenol-A production, thereby avoiding the deactivation of catalyst, by distilling an acetone-methanol-water comprising mixture such that acetone is taken overhead in form of a relatively pure distillate, and substantial portions of the methanol and the water are leaving with the bottom product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.