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:
Oct. 03, 2023
Filed:
Aug. 03, 2022
Applicant:
Mississippi Lime Company, St. Louis, MO (US);
Inventors:
Martin L. Gran, Chesterfield, MO (US);
Randy Griffard, St. Mary, MO (US);
Mary Grass, Ste. Genevieve, MO (US);
Assignee:
Mississippi Lime Company, St. Louis, MO (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01F 11/00 (2006.01); C01F 11/06 (2006.01); C04B 2/10 (2006.01);
U.S. Cl.
CPC ...
C01F 11/06 (2013.01); C04B 2/10 (2013.01); C01P 2006/80 (2013.01);
Abstract
Systems and methods for impurity removal to limestone using modifications to the typical calcination process of turning calcium carbonate into calcium oxide prior to slaking to produce calcium hydroxide. Specifically, substantially increasing the temperature to 1100° C. or higher and increasing soak time can result in reductions in certain undesirable impurities, particularly with regards to lead and lead compounds.