Copper catalyst for hydration of nitriles to amides
US4048226A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 16, 1972 |
| Grant date | Sep 13, 1977 |
| Priority date | — |
| Expiry date | Feb 16, 1992 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J23/72
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Hydration of nitriles, e.g. acrylonitrile, with water in presence of a catalyst comprising catalytic elemental copper prepared by reduction of a copper compound, e.g. copper sulfate, by means of a solution of soluble strong reducing agent, e.g. aqueous solution of sodium borohydride, is described. The copper is thus produced in very fine particulate form having unusually high catalytic activity by comparison with other copper catalyst. Improvements in the reduction are accomplished in alkaline, (e.g. NaOH), solutions and even further in alkaline solution comprising a reducing sugar, e.g. dextrose, in the solution with the strong reducing agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.