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. 19, 1986
Filed:
Apr. 27, 1981
Applicant:
Inventors:
Wilfred P Shum, East Windsor, NJ (US);
John F White, Princeton, NJ (US);
Eva M Beals, Washington Crossing, PA (US);
Assignee:
Atlantic Richfield Company, Los Angeles, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ;
U.S. Cl.
CPC ...
562599 ; 2604055 ; 560214 ;
Abstract
A novel method of converting alkanoic acids, such as isobutyric acid, to alpha-beta unsaturated acids, such as methacrylic acid, is disclosed which exhibits a higher degree of selectivity than those vapor phase oxydehydration methods heretofore known to the art. The preferred method comprises contacting a Dawson structure phosphomolybdic acid catalyst with isobutyric acid under specified reaction conditions to achieve a high selectivity for methacrylic acid.