Chalcogenide compounds with a clay-like cation-exchange capacity and methods of use
US8070959B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 2008 |
| Grant date | Dec 6, 2011 |
| Priority date | — |
| Expiry date | Jan 26, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2101/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
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 UO22+, Th4+ or Pu4+ ions is also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.