Process for purifying gases
US4062931A · kind A · utility
0Cited by
6References
9Claims
0Family size
Inventors
Key dates
| Filing date | Aug 5, 1975 |
| Grant date | Dec 13, 1977 |
| Priority date | — |
| Expiry date | Aug 5, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B17/50
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
In purifying a gas containing at least one of hydrogen cyanide and hydrogen sulfide as a harmful component by fixing the harmful component in water as an aqueous solution of nitrogen-containing sulfur compound so as to render the gas free of the harmful component, an improvement characterized by: PA1 1. burning the aqueous solution of nitrogen-containing sulfur compound to obtain an exhaust gas containing sulfur dioxide, PA1 2. separating the sulfur dioxide from the exhaust gas for recovery, and PA1 3. exhausting the gas after the separation of the sulfur dioxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.