Separation of hydrogen sulfide from gases by the use of cuprous aluminum tetrachloride as a reversible complexing reagent
US4654202A · kind A · utility
Inventor
Key dates
| Filing date | Dec 17, 1984 |
| Grant date | Mar 31, 1987 |
| Priority date | — |
| Expiry date | Dec 17, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01G3/006
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
H.sub.2 S:CuAlCl.sub.4 and 2 H.sub.2 S:CuAlCl.sub.4 are complex addition compounds which may be prepared by contacting CuAlCl.sub.4 with gaseous H.sub.2 S at partial pressures of 0.1 to 1.0 atma and temperatures of 20.degree.-60.degree. C. These new compounds are useful in processes to separate hydrogen sulfide from gaseous mixtures and to prepare pure hydrogen sulfide. Complexation can be accomplished by using CuAlCl.sub.4 in the solid state, in solution or in a slurry. H.sub.2 S is recovered by subjecting the complex addition compounds to some combination of temperature and hydrogen sulfide partial pressure as to break up the complexes and to evolve the hydrogen sulfide content of the complex as a gas stream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.