The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 04, 1984
Filed:
Jan. 11, 1983
Applicant:
Inventors:
Masaaki Kato, Hatsukaichi, JP;
Masatake Kamogawa, Otake, JP;
Toshiharu Nakano, Otake, JP;
Junji Furuse, Otake, JP;
Assignee:
Mitsubishi Rayon Company Limited, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01J / ;
U.S. Cl.
CPC ...
502209 ; 502210 ; 502211 ;
Abstract
A process for improving the operating characteristics of a phosphorous-, molybdenum-, and oxygen-containing catalyst used for the production of an unsaturated carboxylic acid by gas phase catalytic oxidation of a corresponding unsaturated aldehyde, comprising the step of calcinating the catalyst at a temperature of 300.degree.-500.degree. C. while a gas containing 0.05-3 vol. % of ammonia and/or steam is passed over the catalyst.