Process for improving the stability and/or preventing the deactivation of the catalyst during the manufacture of acetic acid and/or of methyl acetate
US6774083B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 1, 2003 |
| Grant date | Aug 10, 2004 |
| Priority date | — |
| Expiry date | May 8, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S502/50
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for improving the stability and/or preventing the deactivation of catalyst in processes of continuous manufacture of acetic acid and/or methyl acetate includes a first, reaction step wherein at least one methyl formate isomerization reaction is carried out in a liquid phase reaction medium, in the presence of carbon monoxide and of a catalytic system including at least one halogenated promoter and at least one iridium-based catalytic compound, and, a second, flash step in which partial vaporization of a reaction medium originating from the first step is carried out in a flash separator. In a non-vaporized liquid fraction resulting from the partial vaporization in the flash separator, an overall content of formic acid and methyl formate is maintained at least equal to 1% by weight of said non-vaporized liquid fraction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.