Vapor phase carbonylation process using group 5 metal promoted iridium catalyst
US6353132B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 25, 1999 |
| Grant date | Mar 5, 2002 |
| Priority date | — |
| Expiry date | Aug 25, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C67/36
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method for producing esters and carboxylic acids from lower alkyl alcohols, ethers, esters and ester-alcohol reactant mixtures and includes the step of contacting a vaporous mixture of the reactants, carbon monoxide and a halide with a supported catalyst under vapor-phase carbonylation conditions. The catalyst includes iridium and a second metal selected from group 5 (vanadium, niobium, tantalum) metals of the periodic table of elements. Desirably, the iridium and secondary metal are deposited on activated carbon as a support material. In a preferred aspect of the invention, the vapor phase carbonylation process is useful for preparing acetic acid, methyl acetate or a mixture thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.