'A method of separating the products resulting palladium carbonylation of conjugated dienes in the presence of palladium'.

摘要

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.