Method of separating olefins from mixtures with paraffins
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C07C-007/144
C07C-007/00
출원번호
US-0626419
(2007-01-24)
등록번호
US-7399897
(2008-07-15)
발명자
/ 주소
Roman,Ian C.
Simmons,John W.
Ekiner,Okan Max
출원인 / 주소
L'Air Liquide Societe Anonyme A Directoire et Conseil de Surveillance pour l'Etude et l'Exploration des Procedes George Claude
대리인 / 주소
Lew,Jeffrey C.
인용정보
피인용 횟수 :
2인용 특허 :
18
초록▼
A process for the separation or concentration of olefinic hydrocarbons from mixtures of olefinic and paraffinic hydrocarbons uses a polyimide membrane, The process is well suited to separating propylene from propylene/propane mixtures. The novel method the membrane exhibits good resistance to plasti
A process for the separation or concentration of olefinic hydrocarbons from mixtures of olefinic and paraffinic hydrocarbons uses a polyimide membrane, The process is well suited to separating propylene from propylene/propane mixtures. The novel method the membrane exhibits good resistance to plasticization by hydrocarbon components in the gas mixture under practical industrial process conditions.
대표청구항▼
What is claimed is: 1. A membrane separation process for separating an olefin from a mixture of olefins and paraffins comprising: (a) providing a two-sided, selectively permeable membrane comprising a polymer or copolymer having repeating units of formula (I): in which R2 is a moiety of composit
What is claimed is: 1. A membrane separation process for separating an olefin from a mixture of olefins and paraffins comprising: (a) providing a two-sided, selectively permeable membrane comprising a polymer or copolymer having repeating units of formula (I): in which R2 is a moiety of composition selected from the group of consisting of formula (A), formula (B), formula (C) and a mixture thereof, Z is a moiety of composition selected from the group consisting of formula (L), formula (M), formula (N) and a mixture thereof; and R1 is a moiety of composition selected from the group consisting of formula (Q), formula (T), formula (S), and a mixture thereof, (b) contacting one side of the membrane with a feed mixture comprising an olefin compound and a paraffin compound having a number of carbon atoms at least as great as the olefin compound, (c) causing the feed mixture to selectively permeate through the membrane, thereby forming on the second side of the membrane an olefin-enriched permeate composition which has a concentration of the olefin compound greater than that of the feed mixture, (d) removing from the second side of the membrane the olefin-enriched permeate composition, and (e) withdrawing from the one side of the membrane an olefin-depleted composition. 2. The process of claim 1 in which the repeating units are of formula (II) and in which moiety R1 is of formula (Q) in 0-100% of the repeating units, of formula (T) in 0-100% of the repeating units, and of formula (S) in a complementary amount totaling 100% of the repeating units. 3. The process of claim 1 wherein the feed mixture comprises ethylene and ethane. 4. The process of claim 1, wherein the feed mixture comprises propylene and propane. 5. The process of claim 1 further comprising the step of executing steps (a)-(d) continuously for a duration after an initial time at which the feed mixture first contacts the membrane, and in which the membrane exhibits a permeance for the olefin compound and the permeance at 72 hours of executing steps (a)-(d) continuously is at least 60% of the permeance at the initial time. 6. The process of claim 1 in which the membrane provides a selectivity of the olefin compound relative to the paraffin compound of at least 10. 7. A membrane separation process for separating an olefin from a mixture of olefins and paraffins comprising: (a) providing a two-sided, selectively permeable membrane comprising a blend of a first polymer and a second polymer, (b) contacting one side of the membrane with a feed mixture comprising an olefin compound and a paraffin compound having a number of carbon atoms at least as great as the olefin compound, (c) causing the feed mixture to selectively permeate through the membrane, thereby forming on the second side of the membrane an olefin-enriched permeate composition which has a concentration of the olefin compound greater than that of the feed mixture, (d) removing from the second side of the membrane the olefin-enriched permeate composition, and (e) withdrawing from the one side of the membrane an olefin-depleted composition, and in which the first polymer comprises repeating units of moieties selected from the group consisting of formula (IIIa) and formula (IIIb), where R1 is a moiety of composition selected from the group consisting of formula (Q), formula (T) and a mixture thereof, where R1 is formula (Q) in about 1-99% of the repeating units of the first polymer, R1 is formula (T) in a complementary amount totaling 100% of the repeating units of the first polymer, and a is in the range of about 1-99% of a+b, and in which the second polymer comprises repeating units of formula (IV) where R3 is formula (Q) in 0-100% of the repeating units of the second polymer, formula (T) in 0-100% of the repeating units of the second polymer, and formula (S) in a complementary amount totaling 100% of the repeating units of the second polymer. 8. The process of claim 7 in which the second polymer constitutes about 10-90 wt. % of the blend of the polymer and the second polymer. 9. The process of claim 8 wherein the feed mixture is in the liquid state. 10. The process of claim 9 in which the membrane provides a permeance of the olefin compound of at least about 0.4 GPU.
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이 특허에 인용된 특허 (18)
Shuey Harry F. (San Dimas CA) Wan Wankei (Sarnia CAX), Asymmetric polyimide reverse osmosis membrane, method for preparation of same and use thereof for organic liquid separat.
Carlsen Daniel B. (Minneapolis MN) Andrus Robert G. (Minneapolis MN) Hall ; II Robert T. (Welch MN), Dialysate filter including an asymmetric microporous, hollow fiber membrane incorporating a polyimide.
Wenthold Randal M. (Belle Plaine MN) Hall ; II Robert T. (Welch MN) Andrus Robert G. (New Hope MN) Cosentino Louis C. (Plymouth MN), Hollow fiber membranes and method of manufacture.
Wenthold Randal M. ; Hall ; II Robert T. ; Andrus Robert G. ; Brinda Paul D. ; Cosentino Louis C. ; Reggin Robert F. ; Pigott Daniel T., Hollow fiber membranes and method of manufacture.
Hafez Mahmoud M. (Sarnia CAX) Black Laura E. (Sarnia CAX), Membrane separation of uncoverted carbon fiber precursors from flux solvent and/or anti-solvent.
Jeanes Thomas O. (Antioch CA) Summers John D. (Walnut Creek CA) Sanders ; Jr. Edgar S. (Pittsburg CA), Novel alicyclic polyimide gas separation membranes.
Black Laura E. (Sarnia CAX) Boucher Heather A. (Sarnia CAX), Process for separating alkylaromatics from aromatic solvents and the separation of the alkylaromatic isomers using membr.
Chin Arthur A. ; Knickerbocker Bryan M. ; Trewella Jeffrey C. ; Waldron Terry R. ; White Lloyd S., Recovery of aromatic hydrocarbons using lubricating oil conditioned membranes.
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