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:
Aug. 16, 1977
Filed:
Jun. 25, 1975
Applicant:
Inventors:
Hideo Matsuzawa, Ohotake, JA;
Masato Otani, Ohotake, JA;
Hiromichi Ishii, Ohotake, JA;
Kantaro Yamada, Yokohama, JA;
Hasao Kobayashi, Ohotake, JA;
Assignee:
Mitsubishi Rayon Company, Ltd., Tokyo, JA;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ; B01J / ; B01J / ;
U.S. Cl.
CPC ...
2605 / ; 252435 ; 252437 ;
Abstract
Acrylic acid or methacrylic acid is prepared by vapor-phase catalytic oxidation of acrolein or methacrolein, with molecular oxygen at a temperature of from 240.degree. to 450.degree. C in the presence of a catalyst represented by the formula: