Chalcogenide Compounds with a Clay-like Cation-exchange Capacity and Methods of Use

Chalcogenide compounds with cation exchange capability and methods of using the compounds are described. Compounds of the general formula A2xMxSn3-XS6 are described wherein x is 0.1-0.95, A is Li+, Na+, K+ or Rb+ and M is Mn2+, Mg2+, Zn2+, Fe2+, Co2+ or Ni2+. Compounds of the general formula H2xMxSn3-XS6 are also described wherein x is 0.1-0.95 and M = Mn2+, Mg2+, Zn2+, Fe2+, Co2 + or Ni2+. The compounds can be layered compounds. The compounds are capable of intercalation of Cs+, Sr2+, Hg2+, Pb2+, Cd2+, and/or Ag+ ions. A process involving contacting the compounds with a solution comprising one or more ions including Cs+, Sr2+, Hg2+, Pb2+, Cd2+, and/or Ag+ is also provided. The one or more ions can be removed from the solution by the compounds. A process comprising contacting compounds of the general formula A2xMxSn3-xS6 with a solution containing UO2 2+, Th4+ or Pu4+ ions is also described.

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WO 2009048552.jpg

WO 2,009,048,552


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