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:
Dec. 06, 1977
Filed:
Jul. 30, 1976
Applicant:
Inventors:
Takeru Onoda, Yokohama, JA;
Masayuki Otake, Yokohama, JA;
Assignee:
Mitsubishi Chemical Industries Ltd., Tokyo, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
2605 / ;
Abstract
Methacrylic acid is manufactured by oxidative dehydrogenation of isobutyric acid in vapor phase in the presence of a supported catalyst containing a heteropolyacid and/or a reduced form of the heteropolyacid. A highly siliceous material having a high water absorbability is used as a carrier for the catalyst to improve the conversion rate and selectivity as well as the catalyst durability.