Use of solid hydroxides as scavenging materials for cyanide gas
US6399036B1 · kind B1 · utility
Inventors
Key dates
| Filing date | Oct 18, 2000 |
| Grant date | Jun 4, 2002 |
| Priority date | — |
| Expiry date | Oct 18, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D53/54
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention relates generally to the use of a combination of alkali metal hydroxides and alkaline-earth metal hydroxides as a scavenging material for cyanide gas. In particular, the present invention relates to a method and means for either filtering out cyanide gas or detoxifying areas contaminated with cyanide using Sodalime or Baralyme™. The scavenging material of the invention is typically incorporated into a scrubbing device wherein a motor (50) powers a fan (52) to draw contaminated air into an inlet (54) and across a filter (56) which contains the scavenger material, thereby absorbing cyanide gas contained in the air.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.