Clean process to destroy arsenic-containing organic compounds with recovery of arsenic
US5545800A · kind A · utility
3Cited by
7References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 21, 1994 |
| Grant date | Aug 13, 1996 |
| Priority date | — |
| Expiry date | Jul 21, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A reduction method is provided for the treatment of arsenic-containing organic compounds with simultaneous recovery of pure arsenic. Arsenic-containing organic compounds include pesticides, herbicides, and chemical warfare agents such as Lewisite. The arsenic-containing compound is decomposed using a reducing agent. Arsine gas may be formed directly by using a hydrogen-rich reducing agent, or a metal arsenide may be formed using a pure metal reducing agent. In the latter case, the arsenide is reacted with an acid to form arsine gas. In either case, the arsine gas is then reduced to elemental arsenic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.