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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.:

US 5143599 B1

PDFFull Text
Date of Patent:
Sep. 01, 1992

Filed:

Jul. 29, 1991

Process for refining kaolin

Applicant:
Inventors:

Gary Derdall, Saskatoon, CA;

Robin L Phinney, Saskatoon, CA;

Assignee:

Kaolin Industries, Ltd., Saskatchewan, CA;

Attorney:

Finnegan, Henderson, Farabow, Garrett & Dunner

Primary Examiner:

Stanley S Silverman

Assistant Examiner:

Thomas M Lithgow

Int. Cl.
CPC ...
B03D / ; B03D / ; B03D / ; C04B / ;
U.S. Cl.
CPC ...
209166 ; 209 10 ; 209 12 ; 209 39 ; 423113 ; 423118 ; 423131 ; 423132 ; 423150 ; 501146 ; 501147 ; 501148 ; 106486 ; 106487 ; 106488 ;
Abstract

A process is disclosed for producing high brightness kaolin from ore containing silica, other types of clays, minerals such as ilmenite micas, feldspars and various metal silicates as well as organic matter. The process consists of sizing, a double floatation step, magnetic separation, leaching and oxidative brightening steps. This is a novel combination of conventional unit operations and in particular the use of a double floatation step to remove quartz and various trace minerals that interfere with achieving high optical brightness for kaolin.

Find Patent Forward Citations

Derdall, Gary. (1992). Process for refining kaolin (U.S. Patent No. 5143599). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5143599

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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