High hydrocarbon resistant chemically cross-linked aromatic polyimide membrane for separations
US9126154B2 · kind B2 · utility
7Cited by
2References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2013 |
| Grant date | Sep 8, 2015 |
| Priority date | — |
| Expiry date | Jun 28, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02C20/20
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
This invention relates to high hydrocarbon resistant chemically cross-linked aromatic polyimide polymers, membranes and methods for making and using these polymers and membranes. The high hydrocarbon resistant chemically cross-linked aromatic polyimide membrane described in the present invention comprises a plurality of repeating units of a first aromatic polyimide comprising hydroxyl groups cross-linked with a second aromatic polyimide comprising carboxylic acid groups via covalent ester bonds. These membranes exhibit high permeability and selectivity in separation of mixtures of gases and liquids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.