Process using rare earths to remove oxyanions from aqueous...

Details Process using rare earths to remove oxyanions from aqueous... Process using rare earths to remove oxyanions from aqueous...

2005-07-27

2008-03-04

Barry, Chester T (Department: 1724)

Liquid purification or separation

Processes

Ion exchange or selective sorption

C210S683000, C210S688000, C210S263000

Reexamination Certificate

active

07338603

ABSTRACT:
Oxyanions of various contaminant elements, such as chromium, antimony, molybdenum, tungsten, vanadium and uranium, are removed from water and other aqueous feeds by treating the feed with (1) a sorbent comprising one or more rare earth compounds, usually mixed or supported on particulate solids having a cation exchange capacity less than 20 milliequivalents per 100 grams or (2) an aqueous solution of one or more soluble rare earth compounds.

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