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. 17, 1991
Filed:
Jun. 12, 1989
Applicant:
Inventors:
Assignee:
Rhone-Poulenc Chimie, Courbevoie, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01F / ;
U.S. Cl.
CPC ...
423608 ;
Abstract
Bridged/lamellar metallic oxides, e.g., those of vanadium, molybdenum, tungsten and titanium, which have large and stable specific surfaces and are well adopted as catalysts, are prepared by (a) intimately admixing a gel of a metallic oxide having a lamellar structure with a cationic solution, (b) adding a solution of a spheroidal cationic species, e.g., a polyoxocation of aluminum, chromium, zirconium, nickel, molybdenum, niobium or tantalum, to the reaction medium thus produced, and then (c) aging the reaction medium for such period of time as to exchange the spheroidal cationic species for the cations introduced in step (a).