Carbonylation with Group VIII noble metal catalysts
US4252741A · kind A · utility
21Cited by
2References
5Claims
0Family size
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Key dates
| Filing date | Oct 6, 1978 |
| Grant date | Feb 24, 1981 |
| Priority date | — |
| Expiry date | Oct 6, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/56
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
In the carbonylation of alkyl esters in the presence of a Group VIII noble metal catalyst to produce a reaction mixture comprising volatile components and the non-volatile Group VIII noble metal catalyst, and the volatile components are separated from the catalyst, catalyst activity is maintained by providing a partial pressure of hydrogen of at least 10 psi during the separation of the volatile products. A partial pressure of at least 15 psi of carbon monoxide is also preferably provided, particularly when a metal promoter for the Group VIII noble metal catalyst is present, during such separation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.