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:
Feb. 23, 2021
Filed:
Jan. 18, 2019
Applicant:
Montgomery Chemicals Llc, Conshohocken, PA (US);
Inventor:
Charles A. Lumsden, Buckhead, GA (US);
Assignee:
MONTGOMERY CHEMICALS LLC, Conshohocken, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02F 1/00 (2006.01); C02F 1/52 (2006.01); C02F 1/66 (2006.01); C02F 103/10 (2006.01); C02F 101/20 (2006.01);
U.S. Cl.
CPC ...
C02F 1/5245 (2013.01); C02F 1/5236 (2013.01); C02F 1/66 (2013.01); C02F 2001/007 (2013.01); C02F 2101/20 (2013.01); C02F 2101/203 (2013.01); C02F 2101/206 (2013.01); C02F 2103/10 (2013.01); C02F 2209/06 (2013.01); C02F 2209/40 (2013.01); C02F 2301/024 (2013.01); C02F 2301/08 (2013.01);
Abstract
Aqueous acid mine drainage is aerated and treated with slaked lime to reduce ferrous iron as a sludge. Further treatment with an alkaline sodium borohydride solution reduces residual iron and manganese which precipitates out and is removed.