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:
Nov. 12, 1991
Filed:
Feb. 22, 1990
Applicant:
Inventors:
Assignee:
Rhone-Poulenc Chimie, Courbevoie, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J / ; C01F / ;
U.S. Cl.
CPC ...
423263 ; 502304 ;
Abstract
Provided is a ceric oxide having a specific surface of at least 85 m.sup.2 /g after calcination between 350.degree. and 550.degree. C., and being further characterized in that it has a pore volume of at least 0.15 cm.sup.3 /g and a median pore diameter greater than 50 .ANG.. The ceric oxide is prepared by destabilizing an aqueous colloidal dispersion of a cerium (IV) compound by the addition of base thereto, separating the precipitate which results and subjecting it to a heat treatment.