Recovery of palladium values from carbonylation reaction medium
US4522760A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 23, 1982 |
| Grant date | Jun 11, 1985 |
| Priority date | — |
| Expiry date | Jul 23, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C67/38
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Palladium values are separated from the products of reaction resulting from the carbonylation of a conjugated diene with carbon monoxide in the presence of an alcohol, a halogenated hydracid and a palladium catalyst, by (i) contacting the carbonylation reaction medium with a nitrogen, phosphorus or arsenic quaternary onium salt, a polar alcohol and an apolar, aliphatic or cycloaliphatic hydrocarbon solvent, and permitting the resulting admixture to phase separate into an alcohol phase and an organic phase; (ii) decanting/separating said alcohol phase from said organic phase; (iii) recovering the palladium values and the quaternary onium salt from said alcohol phase; and (iv) recovering the products of carbonylation from said organic phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.