Process for the removal of catalytic metals and promoter metals from carbonylation process streams
US7799229B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 22, 2005 |
| Grant date | Sep 21, 2010 |
| Priority date | — |
| Expiry date | Mar 20, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/573
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Process for the selective removal of Iridium carbonylation catalyst metal and/or at least one promoter selected from ruthenium, osmium and rhenium from a liquid composition comprising a carbonylation product, iridium carbonylation catalyst metal and/or the promoter metal, corrosion metals and optionally alkali or alkaline earth metals. The process is carried out by contacting the liquid composition with a chelating resin to remove at least a portion of the iridium carbonylation catalyst metal and/or at least one promoter metal contained in the liquid composition. The chelating resin contains at least one thiourea functional group. The process is suitable for treating process streams obtained in the production of carboxylic acids and/or carboxylic anhydrides.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.