Method for processing solution including heavy metal
US4362629A · kind A · utility
9Cited by
3References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 8, 1980 |
| Grant date | Dec 7, 1982 |
| Priority date | — |
| Expiry date | Oct 8, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/912
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A method for processing a waste solution used in a chemical plating process and including a heavy metal complex salt, a reducing agent, and a pH adjusting agent. The heavy metal complex salt is decomposed into a heavy metal component and a complexing agent component by applying ultrasonic vibration to the waste solution. The heavy metal component obtained by decomposition is in a powder state. Then the waste solution is filtered, so that the heavy metal component may be separated from the complexing agent component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.