Recovery of catalyst
US4172782A · kind A · utility
9Cited by
5References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 18, 1978 |
| Grant date | Oct 30, 1979 |
| Priority date | — |
| Expiry date | May 18, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2231/4205
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An organic quaternary ammonium salt used as a catalyst in a reaction between a benzylnitrile and a halide in the presence of an alkali to obtain an .alpha.-alkyl- or .alpha.-phenyl-benzylnitrile, is recovered effectively from the reaction solution containing the .alpha.-alkyl- or .alpha.-phenyl-benzylnitrile, the alkali and the catalyst, by adding water to the reaction solution to make the alkali concentration of the water layer 10% by weight or below, and then separating the water layer containing the organic quaternary ammonium salt from the oil layer containing the .alpha.-alkyl- or .alpha.-phenyl-benzylnitrile.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.