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. 16, 2007
Filed:
Oct. 10, 2003
Applicant:
Michael Dubrovsky, Richmond, CA (US);
Inventor:
Michael Dubrovsky, Richmond, CA (US);
Assignee:
Chevron U.S.A. Inc., San Ramon, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J 20/10 (2006.01); C02F 1/42 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention provides a method for removing selenium from an aqueous stream by passing the aqueous stream, in combination with a quaternary amine compound, through a filter and recovering a treated aqueous stream which is depleted in selenium content relative to the untreated aqueous stream. The present method removes selenium from an aqueous refinery stream by passing the aqueous stream, in combination with a quaternary amine compound, through a filter that can include clay, cellulose, starch, activated carbon, and the like.