Direct oximation of ketones using gallia catalysts

Details Direct oximation of ketones using gallia catalysts Direct oximation of ketones using gallia catalysts

1979-04-16

1980-09-30

Trousof, Natalie

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260566R, 252438, C07C13100, C07C13104

Patent

active

042255112

ABSTRACT:
Ammonia, oxygen e.g., as air, and a ketone react in contact with a gallium oxide catalyst at temperatures such as 50.degree.-500.degree. C., especially such catalyst obtained by heating hydrated gallium nitrate in air at about 350.degree. C. for several hours. The oximes have known utilities, including uses as oxidation inhibitors and as intermediates for production of amides. In particular, when the ketone is cyclohexanone, the cyclohexanone oxime in the reaction product can further be converted to the cyclic amide, caprolactam, e.g. by contacting the product with an aluminosilicate catalyst (treated with boric acid) having average pore diameter of at least 7 angstroms, especially a molecular sieve, suitably downstream in the same direction vessel. Caprolactam is the monomer starting material for nylon 6.

REFERENCES:
patent: 1322291 (1919-11-01), Classen
patent: 3094384 (1963-06-01), Bertolacini et al.
patent: 3574750 (1971-04-01), Yasui et al.
"Handbook of Chemistry and Physics", The Chemical Rubber Co., 50th Ed., (1969-1979), p. C-258.
Kirk-Othmer "Encyclopedia of Chemical Technology", 2nd Ed. (1966), vol. 10, p. 318.

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