Preparation of acetic acid
US8076508B2 · kind B2 · utility
3Cited by
9References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 8, 2008 |
| Grant date | Dec 13, 2011 |
| Priority date | — |
| Expiry date | Jan 24, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/44
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for producing acetic acid is disclosed. The process comprises carbonylating methanol to form a reaction mixture and flashing the reaction mixture to form a vapor stream and a liquid stream. The flash tank is equipped with a distillation column. The vapor stream comprises acetic acid and other volatile components but essentially no catalyst. The liquid stream comprises the catalyst and sufficient amounts of water and acetic acid to carry and stabilize the catalyst. The liquid stream is recycled to the carbonylation and the vapor stream is subjected to further separation to produce essentially pure acetic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.