Inorganic cation exchangers and the process for their preparation
US4609484A · kind A · utility
6Cited by
5References
27Claims
0Family size
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Key dates
| Filing date | Jul 30, 1984 |
| Grant date | Sep 2, 1986 |
| Priority date | — |
| Expiry date | Jul 30, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2002/78
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Mixed phosphorous or arsenic salts of tetravalent metals are provided having the general formula M(HAO.sub.4).sub.2-x (HAO.sub.3).sub.x.nH.sub.2 O, where M is Zr, Ti or Hf, A is phosphorus or arsenic, x is between 0.05 and 1.95, and n is 0 to 6. The salts are highly stable and have wide potential application in the fields of ion exchange, catalysis, intercalation of molecules, solid electrolytes, and chromatography. The salts are prepared by reacting a halide, oxyhalide, nitrate, sulphate, phosphate or oxide of the tetravalent metal, preferably in an aqueous medium, with at least two oxygenated acids of phosphorus and/or arsenic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.