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:
Jan. 10, 1995
Filed:
Nov. 24, 1993
Applicant:
Inventors:
Ernst Bielmeier, Griesheim, DE;
Thomas Haeberle, Einhausen, DE;
Hermann-Josef Siegert, Seeheim-Jugenheim, DE;
Wilhelm Gruber, Darmstadt, DE;
Assignee:
Roehm GmbH Chemische Fabrik, Darmstadt, DE;
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ;
U.S. Cl.
CPC ...
562543 ; 5625122 ; 562523 ;
Abstract
The present invention relates to a process for the production of methacrylic acid and methacrolein by means of gas phase oxidation of isobutane in the gaseous phase at 250.degree. to 450.degree. C. on molybdenum heteropoly acid catalysts that are made up of CU.sub.a H.sub.b P.sub.c Mo.sub.d V.sub.e O.sub.f heteropoly acid compounds (I), where a=0.1 to 1, b=0 to 7.8, c=0.8 to 1.2, d=9 to 12, e=0.5 to 3, and f depends on the molar numbers a to e, and/or the heteropoly acid H.sub.8 PMo.sub.10 VO.sub.39 (II) or its anhydride PMo.sub.10 VO.sub.35 (III).