Precipitation of chloride from zinc sulphate solution
US4263109A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1980 |
| Grant date | Apr 21, 1981 |
| Priority date | — |
| Expiry date | Mar 31, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process is described for the removal of chloride impurity from zinc sulphate solution. The process comprises the steps of forming a slurry of said solution with an inert particulate support material having elemental silver dispersed thereon, and an oxidizing agent, agitating said slurry at a temperature between about 60.degree. and about 100.degree. C. for precipitation of silver chloride on said support material, filtering said slurry to separate purified zinc sulphate solution from the support material containing the precipitated silver chloride, and treating said separated support material containing precipitated silver chloride with a reductant in an aqueous alkaline medium to regenerate elemental silver on said support material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.