Liquid purification or separation – With means to add treating material – With distinct reactor tank – trough or compartment
Reexamination Certificate
2006-05-23
2006-05-23
Hruskoci, Peter A. (Department: 1724)
Liquid purification or separation
With means to add treating material
With distinct reactor tank, trough or compartment
C210S209000, C210S282000
Reexamination Certificate
active
07048853
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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Burba, III John Leslie
McNew Edward Bayer
Witham Richard Donald
Finkle Yale S.
Hruskoci Peter A.
Turner Frank C.
Union Oil Company of California
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