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:
May. 19, 2020
Filed:
Aug. 07, 2017
Applicant:
Ecolab Usa Inc., St. Paul, MN (US);
Inventors:
Bruce A. Keiser, Plainfield, IL (US);
Wayne M. Carlson, Batavia, IL (US);
Nicholas R. Denny, Glen Ellyn, IL (US);
Jianwei Yuan, Aurora, IL (US);
Tommy Hung-Ting Chen, Aurora, IL (US);
Assignee:
ECOLAB USA INC., St. Paul, MN (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C04B 24/12 (2006.01); C04B 11/024 (2006.01); C04B 11/00 (2006.01); C04B 24/26 (2006.01); C04B 24/14 (2006.01); C04B 24/38 (2006.01);
U.S. Cl.
CPC ...
C04B 24/121 (2013.01); C04B 11/007 (2013.01); C04B 11/024 (2013.01); C04B 24/14 (2013.01); C04B 24/2641 (2013.01); C04B 24/2652 (2013.01); C04B 24/38 (2013.01);
Abstract
Additives including sulfur-containing compounds are used in methods of treating synthetic gypsum. The additives can thermally stabilize heavy metals, such as mercury. This thermal stabilization reduces mercury release from the synthetic gypsum. Illustrative, non-limiting examples of sulfur-containing compounds include inorganic sulfides, organic sulfides, organic compounds containing nitrogen and sulfur, organic compounds containing oxygen and sulfur, and polymers containing sulfur.