Process for removing H.sub.2 S and CO.sub.2 from gases and regenerating the adsorbing solution
US4163043A · kind A · utility
18Cited by
10References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 24, 1978 |
| Grant date | Jul 31, 1979 |
| Priority date | — |
| Expiry date | Mar 24, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01G3/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
H.sub.2 S and CO.sub.2 from a waste gas are absorbed in an ammoniacal or alkali metal hydroxide solution. The resultant sodium, potassium or ammonium sulfide solution is reacted with pulverized copper oxide and the resultant copper sulfide precipitate is separated and the resultant solution of increased sodium hydroxide, potassium hydroxide or ammonia content is recycled as absorbent for hydrogen sulfide and CO.sub.2. The copper sulfide is roasted to form recyclable copper oxide and product sulfur dioxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.