Gas purification liquors
US4098886A · kind A · utility
8Cited by
5References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 16, 1977 |
| Grant date | Jul 4, 1978 |
| Priority date | — |
| Expiry date | Feb 16, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2103/18
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Thiosulphate ions present in gas purification liquors, particularly those employed for removing H.sub.2 S by washing with aqueous alkaline solutions of vanadium compounds and anthraquinone disulphonic acids, are decomposed to sulphide and hydroxyl ions by exposing the liquor to a hydrogen rich gas at elevated temperature e.g., 650.degree. C. The liquor may be evaporated and the solid residue subjected to decomposition. Any thiocyanate ions are hydrolyzed; it being necessary to mix steam with the hydrogen rich gas if a solid residue is being decomposed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.