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:
Mar. 14, 1995
Filed:
Oct. 21, 1993
Applicant:
Inventors:
Joseph Iannicelli, Jekyll Island, GA (US);
John T Williamson, Milledgeville, GA (US);
Assignee:
IMPEX, Milledgeville, GA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
501146 ; 106486 ; 106488 ; 25218628 ; 25218726 ; 25218822 ; 423581 ; 423584 ; 501150 ;
Abstract
A method for brightening kaolin contaminated with organic matter by decarboxylation treatment of an aqueous kaolin slurry. The decarboxylation is carried out by contacting the clay slurry with selected oxidizing agent in a pressurized reaction vessel at a temperature of 175.degree.-500.degree. C. without dehydroxylation (calcination) of the kaolin. Oxidizing agents include oxygen, ozone, hydrogen peroxide, and hypochlorite.