Process for the removal of cyanide and other impurities from solution
US4840735A · kind A · utility
5Cited by
7References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 3, 1988 |
| Grant date | Jun 20, 1989 |
| Priority date | — |
| Expiry date | May 3, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/912
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A process for the removal of cyanide and other impurities from an aqueous solution is disclosed. The process comprises adding copper ion and ferrous ion as reagents to the solution at a pH of about 4 to 8 with a ratio of copper to cyanide in the range of 3:1 to 10:1 by weight and with a ratio of iron to copper of at least 0.3:1 by weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.