IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0193897
(2008-08-19)
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등록번호 |
US-7806962
(2010-10-26)
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발명자
/ 주소 |
- Liu, Chunqing
- Chiou, Jeffrey J.
- Wilson, Stephen T.
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
5 인용 특허 :
39 |
초록
▼
The present invention is for novel high performance cross-linkable and cross-linked mixed matrix membranes and the use of such membranes for separations such as for CO2/CH4, H2/CH4 and propylene/propane separations. More specifically, the invention involves the preparation of cross-linkable and cros
The present invention is for novel high performance cross-linkable and cross-linked mixed matrix membranes and the use of such membranes for separations such as for CO2/CH4, H2/CH4 and propylene/propane separations. More specifically, the invention involves the preparation of cross-linkable and cross-linked mixed matrix membranes (MMMs). The cross-linkable MMMs were prepared by incorporating microporous molecular sieves or soluble high surface area microporous polymers (PIMs) as dispersed microporous fillers into a continuous cross-linkable polymer matrix. The cross-linked MMMs were prepared by UV-cross-linking the cross-linkable MMMs containing cross-linkable polymer matrix such as BP-55 polyimide. Pure gas permeation test results demonstrated that both types of MMMs exhibited higher performance for CO2/CH4 and H2/CH4 separations than those of the corresponding cross-linkable and cross-linked pure polymer matrices.
대표청구항
▼
The invention claimed is: 1. A process for separating at least one gas from a mixture of gases, the process comprising: a) providing a mixed matrix membrane comprising an aromatic polyimide comprising UV-cross-linkable sulfonic groups as a continuous phase and microporous molecular sieves dispersed
The invention claimed is: 1. A process for separating at least one gas from a mixture of gases, the process comprising: a) providing a mixed matrix membrane comprising an aromatic polyimide comprising UV-cross-linkable sulfonic groups as a continuous phase and microporous molecular sieves dispersed in the continuous phase wherein said mixed matrix membrane is permeable to said at least one gas; b) contacting the mixture of gases to a first side of the mixed matrix membrane to cause said at least one gas to permeate the mixed matrix membrane; and c) removing from a second side of the membrane a permeate gas composition comprising at least a portion of said at least one gas which permeated said membrane. 2. The process of claim 1 wherein said molecular sieves are selected from the group consisting of SAPO-34, Si-DDR, AlPO-14, AlPO-34, AlPO-18, LTA, ERS-12, NaA (4A), CaA (5A), KA (3A), CDS-1, SSZ-62, UZM-9, UZM-13, UZM-17, UZM-19, MCM-65, MCM-47, silicalite-1, Si-MTW, UZM-8, SAPO-31, EU-1, ZSM-57, NU-87, Si-BEA, Si-MEL, FAU, OFF, zeolite L, NaX, NaY, and CaY molecular sieves. 3. A mixed matrix membrane comprising an aromatic polyimide comprising UV-cross-linkable sulfonic groups as a continuous phase and microporous molecular sieves dispersed in said cross-linkable continuous phase. 4. The mixed matrix membrane of claim 3 wherein said molecular sieves are selected from the group consisting of SAPO-34, Si-DDR, AlPO-14, AlPO-34, AlPO-18, LTA, ERS-12, NaA (4A), CaA (5A), KA (3A), CDS-1, SSZ-62, UZM-9, UZM-13, UZM-17, UZM-19, MCM-65, MCM-47, silicalite-1, Si-MTW, UZM-8, SAPO-31, EU-1, ZSM-57, NU-87, Si-BEA, Si-MEL, FAU, OFF, zeolite L, NaX, NaY, and CaY molecular sieves. 5. The mixed matrix membrane of claim 3 wherein said mixed matrix membrane has a geometry selected from the group consisting of sheets, hollow fibers and tubes. 6. A method of making a mixed matrix membrane comprising: providing an aromatic polyimide comprising UV-cross-linkable sulfonic groups as a continuous phase organic polymer; providing microporous molecular sieves; dispersing the microporous molecular sieves into a solution containing the continuous phase organic polymer; allowing the continuous phase organic polymer to solidify about the microporous molecular sieves to produce a mixed matrix membrane; and exposing said continuous phase organic polymer to UV radiation for a sufficient period of time to cross-link said continuous phase organic polymer. 7. The method of claim 6 wherein said microporous molecular sieves are selected from the group consisting of SAPO-34, Si-DDR, AlPO-14, AlPO-34, AlPO-18, LTA, ERS-12, NaA (4A), CaA (5A), KA (3A), CDS-1, SSZ-62, UZM-9, UZM-13, UZM-17, UZM-19, MCM-65, MCM-47, silicalite-1, Si-MTW, UZM-8, SAPO-31, EU-1, ZSM-57, NU-87, Si-BEA, Si-MEL, FAU, OFF, zeolite L, NaX, NaY, and CaY molecular sieves.
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