Three-stage membrane gas separation process
US7604681B2 · kind B2 · utility
18Cited by
16References
33Claims
0Family size
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Key dates
| Filing date | May 26, 2006 |
| Grant date | Oct 20, 2009 |
| Priority date | — |
| Expiry date | Nov 23, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02C20/40
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for removing carbon dioxide or nitrogen from gas, especially natural gas. The process uses three membrane separation stages without compression between the second and third stages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.