Mixed matrix membranes incorporating microporous polymers as fillers
US7410525B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 2005 |
| Grant date | Aug 12, 2008 |
| Priority date | — |
| Expiry date | Apr 21, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249977
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention is for a polymer/polymer mixed matrix membrane and the use of such membranes in gas separation applications. More specifically, the invention involves the preparation of polymer/polymer mixed matrix membranes incorporating soluble polymers of intrinsic microporosity as microporous fillers. These polymeric fillers of intrinsic microporosity exhibit behavior analogous to that of conventional microporous materials including large and accessible surface areas, interconnected micropores of less than 2 nm in size, as well as high chemical and thermal stability, but, in addition, possess properties of conventional polymers including good solubility and easy processability. Gas separation experiments on these mixed matrix membranes show dramatically enhanced gas separation performance for CO2 removal from natural gas. Mixed matrix membranes prepared in accordance with the present invention can also be used in the separation of the following pairs of gases: hydrogen/methane, carbon dioxide/nitrogen, methane/nitrogen and olefin/paraffin such as propylene/propane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.