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:
Oct. 12, 1993
Filed:
Oct. 16, 1992
Toshinao Aono, Chiba, JP;
Yukio Asami, Tokyo, JP;
Noboru Hirooka, Tokyo, JP;
Yusaku Arima, Onga, JP;
Susumu Fujii, Kitakyushu, JP;
Kawasaki Steel Corporation, , JP;
Abstract
A process for the production of carboxylic anhydrides from aromatic hydrocarbons in gas phase oxidation by using a high activity and high selectivity fluid catalyst, comprising 50 to 95% by weight calculated as TiO.sub.2 +SiO.sub.2 +B.sub.2 O.sub.3 of component (A) which comprises titanium oxide, silicon dioxide and boron oxide and 5 to 50% by weight calculated as V.sub.2 O.sub.5 +M.sub.2 O (M represents an alkali metal) +SO.sub.3 of component (B) comprising vanadium oxide, an alkali metal oxide and sulfuric anhydride, wherein weight ratios of B.sub.2 O.sub.3 to TiO.sub.2 and SiO.sub.2 to TiO.sub.2 in said component (A) are in the range of 0.02 to 0.5 and 0.25 to 1.0, respectively, is provided.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile