Mixed matrix membranes with small pore molecular sieves and methods for making and using the membranes
US7166146B2 · kind B2 · utility
27Cited by
28References
38Claims
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Key dates
| Filing date | Dec 24, 2003 |
| Grant date | Jan 23, 2007 |
| Priority date | — |
| Expiry date | Mar 15, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S55/05
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A mixed matrix membrane is provided which comprises a continuous phase organic polymer and small pore molecular sieves dispersed therein. The molecular sieves have a largest minor crystallographic free diameter of 3.6 Angstroms or less. When these molecular sieves are properly interspersed with a continuous phase polymer, the membrane will exhibit a mixed matrix membrane effect, i.e., a selectivity increase of at least 10% relative to a neat membrane containing no molecular sieves. Finally, methods for making and using such mixed matrix membranes to separate gases from a mixture containing two or more gases are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.