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:
Dec. 27, 2022
Filed:
Oct. 26, 2015
Applicant:
Ecolab Usa Inc., St. Paul, MN (US);
Inventors:
Tarun Kumar Bera, Maharashtra, IN;
Jitendra T. Shah, Naperville, IL (US);
Vaideeswaran Sivaswamy, Pune, IN;
Assignee:
Ecolab USA Inc., St. Paul, MN (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C02F 1/52 (2006.01); C02F 1/70 (2006.01); C01B 17/66 (2006.01); C01B 19/02 (2006.01); C02F 101/10 (2006.01); C02F 103/18 (2006.01); C02F 1/66 (2006.01); C02F 101/20 (2006.01); C02F 103/10 (2006.01);
U.S. Cl.
CPC ...
C02F 1/5245 (2013.01); C01B 17/66 (2013.01); C01B 19/02 (2013.01); C02F 1/70 (2013.01); C02F 1/66 (2013.01); C02F 2101/106 (2013.01); C02F 2101/20 (2013.01); C02F 2103/10 (2013.01); C02F 2103/18 (2013.01);
Abstract
A method for efficiently removal of oxidised selenium from liquid, such as FGD wastewater. The method involves adding a non-iron-based reducing agent (e.g. sodium dithionite) and preferably Fe(II) ions to the liquid at a pH of above 7.5 or 8 and precipitating elemental selenium from the liquid.