Robert A Small

US Patent:

41208196, Oct 17, 1978

Filed:

Sep 15, 1977

Appl. No.:

5/833506

Inventors:

Robert James Small - Worthington OH

Assignee:

Ashland Oil, Inc. - Ashland KY

International Classification:

B01J 2396
B01J 2120
C07C10332

US Classification:

252413

Abstract:

Palladium or platinum catalyst values poisoned in course of catalyzing the reductive alkylation of an acid hydrazide are essentially completely reactivated by treating the spent catalyst values with a dilute aqueous solution of a lower monocarboxylic acid or a mineral acid and contacting the resultant slurry with oxygen gas or a labile oxygen containing compound.

US Patent:

41276116, Nov 28, 1978

Filed:

Oct 11, 1977

Appl. No.:

5/840538

Inventors:

Robert J. Small - Worthington OH

Assignee:

Ashland Oil, Inc. - Ashland KY

International Classification:

C07C 8500

US Classification:

260583B

Abstract:

A residual amount of hydrazine present in an acethydrazide solution prepared by condensing hydrazine with ethyl acetate is treated by either reaction with carbon dioxide or oxidation with air in the presence of palladium or platinum catalyst. Treatment of said acid hydrazide solution in the foregoing manner obviates the catalyst poisoning potential of the unreacted hydrazine upon subsequent reductive methylation of the hydrazide solution in the presence of palladium or platinum catalyst.