Process for producing a denaturated manganese dioxide catalyst for the hydration reaction of cyanohydrins
US5061675A · kind A · utility
2Cited by
4References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 25, 1990 |
| Grant date | Oct 29, 1991 |
| Priority date | — |
| Expiry date | Jun 25, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C231/065
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for producing a denatured manganese dioxide for the hydration reaction of cyanohydrins comprising reacting an aqueous permanganate salt solution and an aqueous manganese (II) compound in an acidic aqueous solution at a temperature of 70.degree. C. to 130.degree. C. is disclosed. The manganese dioxide catalyst obtained by the process exhibits a high activity over a long period in the preparation of an amide by the hydration of the corresponding cyanohydrin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.