Process for producing .alpha.-hydroxyisobutyramide

Details Process for producing .alpha.-hydroxyisobutyramide Process for producing .alpha.-hydroxyisobutyramide

1993-10-12

1995-10-31

Kumar, Shailendra

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

564124, 564127, 564128, 502324, C07C23106

Patent

active

054631238

ABSTRACT:
There is disclosed a process for producing .alpha.-hydroxyisobutyramide by hydration reaction of acetone cyanohydrin in the presence of a catalyst consisting essentially of manganese dioxide which process comprises pretreating the catalyst with a reducing agent. The above process is capable of eliminating the catalyst clogging trouble due to the deposition of the by-produced oxamide and thus proceeding with long-term reaction with the stabilized catalyst performance.

REFERENCES:
patent: 4018829 (1977-04-01), Gruber et al.
patent: 4329500 (1982-05-01), Habermann
patent: 4820872 (1989-04-01), Farrar et al.
patent: 4950801 (1990-08-01), Ebata et al.
patent: 4987256 (1991-01-01), Ebata et al.
Chemical Abstracts, vol. 117, No. 1, 1992, Columbus, Ohio, US; Abstract No. 7527v. Preparation of Alpha-Hydroxysobutyramide, p. 763, of JP-A-4 046 145.
Chemical Abstracts, vol. 118, No. 11, 1993, Columbus, Ohio, US; Abstract No. 101522g, Preparation of Alpha-Hydroxyisobutyramide p. 804, of JP-A-4-282 352.

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