Catalyst – solid sorbent – or support therefor: product or process – Solid sorbent – Having specifically intended extraneously added iron group...
Patent
1998-08-18
2000-04-04
Griffin, Steven P.
Catalyst, solid sorbent, or support therefor: product or process
Solid sorbent
Having specifically intended extraneously added iron group...
502402, 502407, B01J 2002, B01J 2010, B01J 2026
Patent
active
060461314
ABSTRACT:
The invention provides a method for the preparation of a sorbent capable of efficiently and selectively sorbing cesium ions from an aqueous solution. The method comprises impregnating the pores of a high-porosity carrier material such as silica gel and porous adsorbent resin with water-soluble potassium or sodium hexacyanoferrate (II) and contacting the carrier material with a solution of a copper salt in a solvent in which the water-soluble hexacyanoferrate (II) is hardly soluble such as ethyl alcohol to convert the water-soluble hexacyanoferrate (II) into water-insoluble copper hexacyanoferrate (II). The cesium ions sorbed on the sorbent can be readily desorbed and the sorbent can readily be regenerated. Alternatively, the carrier material is impregnated with a water-soluble hexacyanoferrate (III) which is converted into copper hexacyanoferrate (III) followed by a reducing reaction of the same into copper hexacyanoferrate (II).
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Donley Cynthia M.
Griffin Steven P.
Japan as represented by Director General of Agency of Industrial
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