Multi-layer composite gas separation membranes, methods for preparation, and use
US11642629B2 · kind B2 · utility
0Cited by
26References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 20, 2020 |
| Grant date | May 9, 2023 |
| Priority date | — |
| Expiry date | Jul 3, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10L2290/548
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Methods and systems for producing and using multi-layer composite co-polyimide membranes, one method for producing including preparing a microporous or mesoporous membrane support material for coating; applying a sealing layer to the membrane support material to prevent intrusion into the membrane support material of co-polyimide polymer; applying a first permselective co-polyimide layer atop and in contact with the sealing layer; and applying a second permselective co-polyimide layer atop and in contact with the first permselective co-polyimide layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.