Polyimide blends for gas separation membranes
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IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01D-053/22
B01D-069/08
B01D-069/00
B01D-071/64
B01D-071/00
출원번호
US-0642407
(2003-08-15)
발명자
/ 주소
Simmons,John W.
Ekiner,Okan Max
출원인 / 주소
L'Air Liquide, Societe Anonyme a Directoire et Conseil de Surveillance Pour l'Etude et l'Exploitation des Procedes Georges Claude
인용정보
피인용 횟수 :
14인용 특허 :
40
초록▼
The present invention provides a selectively gas permeable membrane that has a superior combination of permeability and selectivity. The membrane composition includes a Type 1 copolyimide uniformly blended with a Type 2 copolyimide, which polymers are defined by chemical structure more specifically
The present invention provides a selectively gas permeable membrane that has a superior combination of permeability and selectivity. The membrane composition includes a Type 1 copolyimide uniformly blended with a Type 2 copolyimide, which polymers are defined by chemical structure more specifically in this disclosure. The invention also provides a method of using the membrane of the copolyimide blend to separate components of gas mixtures.
대표청구항▼
What is claimed is: 1. A method of separating one or more gases from a gas mixture comprising: (a) providing a gas separation membrane comprising a blend of at least one polymer of a Type 1 copolyimide and at least one polymer of a Type 2 copolyimide, in which the Type 1 copolyimide comprises repea
What is claimed is: 1. A method of separating one or more gases from a gas mixture comprising: (a) providing a gas separation membrane comprising a blend of at least one polymer of a Type 1 copolyimide and at least one polymer of a Type 2 copolyimide, in which the Type 1 copolyimide comprises repeating units of formula I in which R2 is a moiety having a composition selected from the group consisting of formula A, formula B, formula C, and a mixture thereof, Z is a moiety having a composition selected from the group consisting of formula L, formula M, formula N, and a mixture thereof; and R1 is a moiety having a composition selected from the group consisting of formula Q, formula S, formula T, and a mixture thereof, in which the Type 2 copolyimide comprises the repeating units of formulas IIa and IIb, in which Ar is a moiety having a composition selected from the group consisting of formula U, formula V, and a mixture thereof, and in which X, X1, X2, X3 independently are hydrogen or an alkyl group having 1 to 6 carbon atoms, provided that at least two of X, X1, X2, or X3 on each of U and V are an alkyl group, Ar' is any aromatic moiety, Ra and Rb, each independently have composition of formulas A, B, C, D or a mixture thereof, and Z is a moiety having composition selected from the group consisting of formula L, formula M, formula N, and a mixture thereof; (b) contacting the gas mixture with one side of the gas separation membrane, thereby causing more preferentially permeable gases of the mixture to permeate the membrane faster than less preferentially permeable gases to form a permeate gas mixture enriched in the more preferentially permeable gases on the opposite side of the membrane, and a retentate gas mixture depleted in the more preferentially permeable gases on the one side of the membrane; and (c) withdrawing the permeate gas mixture and the retentate gas mixture separately from the membrane. 2. The method of claim 1, in which the gas mixture comprises carbon dioxide and methane. 3. A membrane for gas separation comprising a blend of at least one polymer of a Type 1 copolyimide and at least one polymer of a Type 2 copolyimide in which the Type 1 copolyimide comprises repeating units of formula I in which R2 is a moiety having a composition selected from the group consisting of formula A, formula B, formula C and a mixture thereof, Z is a moiety having a composition selected from the group consisting of formula L, formula M, formula N and a mixture thereof; and R1 is a moiety having a composition selected from the group consisting of formula Q, formula S, formula T, and a mixture thereof, in which the Type 2 copolyimide comprises the repeating units of formulas IIa and IIb in which Ar is a moiety having a composition selected from the group consisting of formula U, formula V, and a mixture thereof, and in which X, X1, X2, X3 independently are hydrogen or an alkyl group having 1 to 6 carbon atoms, provided that at least two of X1, X2, or X3 on each of U and V are an alkyl group, Ar' is any aromatic moiety, Ra and Rb each independently have composition of formulas A, B, C, D or a mixture thereof, and Z is a moiety having composition selected from the group consisting of formula L, formula M, formula N and a mixture thereof 4. The membrane of claim 3, in which the Type 1 copolyimide comprises repeating units of formula Ia. 5. The membrane of claim 4, in which R1 is formula Q in about 16% of the repeating units, formula S in about 64% of the repeating units and formula T in about 20% of the repeating units. 6. The membrane of claim 3, in which the Type 1 copolyimide comprises repeating units of formula Ib 7. The membrane of claim 6, in which R1 is a composition of formula Q in about 1-99% of the repeating units, and of formula S in a complementary amount totaling 100% of the repeating units. 8. The membrane of claim 3, in which the Type 1 copolyimide comprises repeating units having composition of formula Ia and repeating units having composition of formula Ib in which units of formula Ib constitute about 1-99% of the total repeating units of formulas Ia and Ib, and in which R1 is a composition of formula Q in about 1-99% of the repeating units, and of formula S in a complementary amount totaling 100% of the repeating units. 9. The membrane of claim 8, in which the moiety R1 has a composition of formula Q in about 20% of the repeating units, and of formula S in about 80% of the repeating units, and in which repeating units of formula Ib are about 40% of the total of repeating units of formulas Ia and Ib. 10. The membrane of claim 3, in which the ratio of Type 1 copolyimide to Type 2 copolyimide is greater than about 0.2. 11. The membrane of claim 10, in which the ratio of Type 1 copolyimide to Type 2 copolyimide is greater than about 1.0. 12. The membrane of claim 3, in which repeating units of formula IIa are at least about 25% of the total repeating units of formula IIa and IIb. 13. The membrane of claim 12, in which repeating units of formula IIa are at least about 50% of the total repeating units of formula IIa and IIb. 14. The membrane of claim 3, in which the Type 2 copolyimide is formed by polycondensation of an aromatic amine selected from the group consisting of 2,4-diaminomesitylene, 3,7-diamino-2,8-dimethyldiphenylsulfone and a mixture thereof, and a dianhydride selected from the group consisting of pyromellitic dianhydride, 3,3',4,4'-diphenylsulfone tetracarboxylic dianhydride, 3 , 3',4,4'-biphenyl tetracarboxylic dianhydride, 4,4'-(2,2,2-trifluoro-1-(trifluoromethyl) ethylidine)bis(1,2-benzene dicarboxylic acid dianhydride) and a mixture thereof. 15. The membrane of claim 3, in which the membrane is an asymmetric membrane. 16. The membrane of claim 15, in which the membrane is a hollow fiber.
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이 특허에 인용된 특허 (40)
Simmons John W. (Wilmington DE), Alkyl substituted polyimide, polyamide and polyamide-imide gas separation membranes.
Ekiner Okan M. (Wilmington DE), Blends of polyethersulfones with aromatic polymides, polyamides or polyamide-imides useful for making gas separation mem.
Koros, William J.; Wallace, David; Wind, John D.; Miller, Stephen J.; Staudt-Bickel, Claudia; Vu, De Q., Crosslinked and crosslinkable hollow fiber mixed matrix membrane and method of making same.
Burgoyne ; Jr William F. (Allentown PA) Langsam Michael (Allentown PA) Bott Richard H. (Macungie PA), Gas separating membranes formed from blends of polyimide polymers.
Avrillon Ren (Maison Laffite FRX) Descamps Andr (Noisy le Roi FRX) Driancort Alain (Bourg La Reine FRX) Mileo Jean-Claude (Saint Ismier FRX) Robert Eric (Rueil Malmaison FRX), Gas separation membrane.
Kohn Rachel S. (Springfield NJ) Coleman Maria R. (Austin TX) Chung Tai-Shung (Randolph NJ), Gas separation membranes comprising miscible blends of polyimide polymers.
Ekiner Okan M. (Wilmington DE) Simmons John W. (Wilmington DE), Gas separation membranes made from blends of aromatic polyamide, polymide or polyamide-imide polymers.
Macheras James T. (Quincy MA) Bikson Benjamin (Brookline MA) Nelson Joyce K. (Lexington MA), Method of preparing membranes from blends of polyetherimide and polyimide polymers.
Nakatani Masayuki (Ichihara JPX) Sumiyama Yoshiyuki (Ichihara JPX) Kusuki Yoshihiro (Ichihara JPX), Pervaporation method of selectively separating water from an organic material aqueous solution through aromatic imide po.
White Lloyd S. (Columbia MD) Wang I-Fan (Olney MD) Minhas Bhupender S. (Ellicott City MD), Polyimide membrane for separation of solvents from lube oil.
Sylvain Faure FR; Michel Pineri FR; Pierre Aldebert FR; Regis Mercier FR; Bernard Sillion FR, Sulphonated polyimides, membranes prepared with them, and a fuel cell device that includes these membranes.
Yates, Stephen F.; McGuirl, Matthew C.; Tonev, Tihomir G.; Liu, Chunqing; Chiou, Jeffrey; Arzadon, Amber, Photo-crosslinked gas selective membranes as part of thin film composite hollow fiber membranes.
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