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:
Apr. 05, 1977
Filed:
Feb. 07, 1975
Applicant:
Inventor:
Ralph O Kerr, Houston, TX (US);
Assignee:
Petro-Tex Chemical Corporation, Houston, TX (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B01J / ;
U.S. Cl.
CPC ...
252437 ; 252435 ; 2603 / ;
Abstract
C.sub.4 vanadium - phosphorus oxidation catalysts for producing maleic acid are prepared in an aqueous phosphoric acid solution using a reducing agent comprising an organic acid or aldehyde and a secondary alcohol such as oxalic acid and ethanol in a mole of 1:1 to 3 respectively, in which an inorganic vanadium compound such as V.sub.2 O.sub.5 is dissolved and reduced to vanadium of 5.sup.+ valency or less.