Sour gas treatment process including membrane and non-membrane treatment steps
US5407466A · kind A · utility
72Cited by
30References
57Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 25, 1993 |
| Grant date | Apr 18, 1995 |
| Priority date | — |
| Expiry date | Oct 25, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2257/304
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Improved processes for treating gas streams containing hydrogen sulfide, carbon dioxide, water vapor and methane, particularly natural gas streams. The processes rely on the availability of two membrane types, one of which has a hydrogen sulfide/methane selectivity of at least about 40 when measured with multicomponent gas mixtures at high pressure. Based on the different permeation properties of the two membrane types, optimized separation processes can be designed. The membrane separation is combined with non-membrane treatment of the residue and/or permeate streams.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.