Method for reducing impurities in hexammine cobalt halide compounds
US5102633A · kind A · utility
1Cited by
5References
16Claims
0Family size
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Key dates
| Filing date | May 20, 1991 |
| Grant date | Apr 7, 1992 |
| Priority date | — |
| Expiry date | May 20, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01G51/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for reducing impurity levels of calcium, magnesium and/or silicon in hexammine cobalt halide compounds involves the addition of ferric ions and, optionally, soluble fluorides to an aqueous hexammine cobalt (III) chloride solution having a pH of at least 9. Insoluble compounds of magnesium fluoride, calcium fluoride, and/or ferric hydroxide and silicon coprecipitates are removed from the solution by filtration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.