Removal of permanganate reducing compounds from methanol carbonylation process stream
US8076507B2 · kind B2 · utility
11Cited by
12References
73Claims
0Family size
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Key dates
| Filing date | Apr 20, 2007 |
| Grant date | Dec 13, 2011 |
| Priority date | — |
| Expiry date | Jun 11, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/48
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
An improvement of the methanol carbonylation process for manufacturing acetic acid is disclosed. Specifically disclosed is a method for reducing the formation of alkyl iodides and C3-8 carboxylic acids by removing permanganate reducing compounds (“PRC's”) from the light phase of the condensed light ends overhead stream, including (a) distilling the light phase to yield a PRC enriched overhead stream; and (b) extracting the third overhead stream with water in at least two consecutive stages and separating therefrom one or more aqueous streams containing PRC″s.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.