Process for the production of acetic acid
US8283493B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 11, 2009 |
| Grant date | Oct 9, 2012 |
| Priority date | — |
| Expiry date | Feb 11, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/12
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Process for the production of acetic acid by (a) introducing methanol, methyl acetate, dimethyl ether and/or methyl iodide and carbon monoxide into a first reaction zone containing a liquid reaction composition comprising a carbonylation catalyst, optionally a carbonylation catalyst promoter, methyl iodide, methyl acetate, acetic acid and water, (b) withdrawing at least a portion of the liquid reaction composition together with dissolved and/or entrained carbon monoxide and other gases from the first reaction zone, (c) passing at least a portion of the withdrawn liquid reaction composition to a second reaction zone, wherein at least a portion of the dissolved and/or entrained carbon monoxide is consumed, (d) passing at least a portion of the liquid reaction composition from the second reaction zone into a flash separation zone to form a vapor fraction, which comprises acetic acid, methyl iodide, methyl acetate and low pressure off-gas, comprising carbon monoxide; and a liquid fraction, which comprises carbonylation catalyst and optional carbonylation catalyst promoter, and (e) passing the vapor fraction from the flash separation zone to one or more distillation zones to recover ace…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.