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:
Mar. 30, 2010
Filed:
Oct. 26, 2007
Richard Donald Witham, Boulder City, NV (US);
Edward Bayer Mcnew, Las Vegas, NV (US);
John Leslie Burba, Iii, Parker, CO (US);
Richard Donald Witham, Boulder City, NV (US);
Edward Bayer McNew, Las Vegas, NV (US);
John Leslie Burba, III, Parker, CO (US);
Molycorp Minerals, LLC, Greenwood Village, CO (US);
Abstract
Arsenic is removed from water and other aqueous feeds by (1) treating the feed with a compound containing cerium in the +4 oxidation state, preferably cerium dioxide, to oxidize arsenic in the +3 oxidation state to arsenic in the +5 oxidation state and (2) removing the arsenic in the +5 oxidation state from the aqueous phase, normally by contacting the treated feed with alumina or other precipitating agent containing cations in the +3 oxidation state.