Continuous process for the purification of zinc plants electrolytes using copper arsenates
US4252622A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 21, 1980 |
| Grant date | Feb 24, 1981 |
| Priority date | — |
| Expiry date | Jan 21, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Continuous process for the purification of zinc plant electrolyte employing copper arsenate for the removal of cobalt and associated impurities in a four-step treatment comprising: PA1 (1) cementation of copper with fine zinc dust, PA1 (2) precipitation of the major portion of cobalt by the addition of coarse zinc dust, dilute sulfuric acid and copper arsenate, PA1 (3) further addition of coarse zinc dust and dilute acid to precipitate more cobalt and reduce the cobalt level in said electrolyte to about 1.0 ppm, and PA1 (4) further addition of coarse zinc dust and dilute acid to reduce the cobalt level in said electrolyte to less than about 0.1 ppm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.