Automatic pH control in a process for removal of hydrogen sulfide from a gas
US4643886A · kind A · utility
11Cited by
6References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 6, 1985 |
| Grant date | Feb 17, 1987 |
| Priority date | — |
| Expiry date | Dec 6, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B17/05
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for removing hydrogen sulfide from a gaseous stream by contacting the gaseous stream with a polyvalent metal chelate present in an aqueous alkaline scrubbing solution including the regeneration of the polyvalent metal chelate in an electrolytic cell and automatic control of the pH of said aqueous alkaline scrubbing solution at about 7 to 9.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.