Gas separation using coated membranes
US6896717B2 · kind B2 · utility
56Cited by
58References
45Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 2, 2003 |
| Grant date | May 24, 2005 |
| Priority date | — |
| Expiry date | Oct 14, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D71/44
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A membrane-based process for separating mixtures of target gases if the gas mixture also contains C3+ hydrocarbon vapors. The process uses gas-separation membranes having a base membrane and a coating layer. The base membrane incorporates a selective layer made from a polymer selective between the light gases to be separated. The coating layer comprises a fluorinated polymer capable of protecting the base membrane from C3+ hydrocarbon vapors and liquids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.