Hybrid membrane/cryogenic process for hydrogen purification
US4654047A · kind A · utility
29Cited by
13References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 23, 1985 |
| Grant date | Mar 31, 1987 |
| Priority date | — |
| Expiry date | Aug 23, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S62/931
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention involves a process for recovering hydrogen from a feed gas mixture comprising hydrogen and at least one other component. The feed gas mixture is initially separated in a membrane separation unit to produce a hydrogen-rich stream and a hydrogen-lean stream. The hydrogen-lean stream is subsequently treated in a cryogenic separation unit to remove a portion of the non-hydrogen components and produce a hydrogen-enriched stream. The hydrogen-enriched stream from the cryogenic separation unit is recycled and combined with the feed gas mixture to the membrane separation unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.