Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Richard Donald Witham0
Edward Bayer McNew0
John Leslie Burba, III0
Date of Patent
March 30, 2010
0Patent Application Number
119252470
Date Filed
October 26, 2007
0Patent Primary Examiner
Patent 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.
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