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:
Sep. 19, 2023
Filed:
Dec. 09, 2021
Applicant:
Knauf Gips KG, Iphofen, DE;
Inventors:
Qinghua Li, Rolling Meadows, IL (US);
Ashish Dubey, Grayslake, IL (US);
Mark Hemphill, Hawthron Woods, IL (US);
Assignee:
KNAUF GIPS KG, Iphonfen, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C04B 11/00 (2006.01); B01J 20/08 (2006.01); B01J 20/10 (2006.01); B01J 20/18 (2006.01); B01J 20/28 (2006.01); B01J 20/34 (2006.01);
U.S. Cl.
CPC ...
C04B 11/007 (2013.01); B01J 20/08 (2013.01); B01J 20/103 (2013.01); B01J 20/18 (2013.01); B01J 20/28004 (2013.01); B01J 20/28016 (2013.01); B01J 20/28047 (2013.01); B01J 20/28059 (2013.01); B01J 20/3408 (2013.01); B01J 20/3433 (2013.01); B01J 20/3475 (2013.01);
Abstract
Beads of materials such as activated alumina, zeolite and silica gel, are used as chloride salt absorbers. The beads are mixed with high-salt gypsum. After mixing for a short time, the mixtures are dried, and the beads and the powder are separated by using a sieve or other physical separation device resulting in a low-salt gypsum which can be used as a gypsum source to make gypsum wallboard.