JPH0460691B2 - - Google Patents
Info
- Publication number
- JPH0460691B2 JPH0460691B2 JP62097645A JP9764587A JPH0460691B2 JP H0460691 B2 JPH0460691 B2 JP H0460691B2 JP 62097645 A JP62097645 A JP 62097645A JP 9764587 A JP9764587 A JP 9764587A JP H0460691 B2 JPH0460691 B2 JP H0460691B2
- Authority
- JP
- Japan
- Prior art keywords
- membrane
- barrier layer
- polymer
- liquid
- wetting liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000012528 membrane Substances 0.000 claims description 123
- 239000007788 liquid Substances 0.000 claims description 105
- 230000004888 barrier function Effects 0.000 claims description 100
- 229920000642 polymer Polymers 0.000 claims description 73
- 238000000034 method Methods 0.000 claims description 58
- 238000009736 wetting Methods 0.000 claims description 36
- 239000002904 solvent Substances 0.000 claims description 24
- 239000000203 mixture Substances 0.000 claims description 18
- 230000000694 effects Effects 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 11
- 230000000903 blocking effect Effects 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 7
- 239000012298 atmosphere Substances 0.000 claims description 4
- 229910052809 inorganic oxide Inorganic materials 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 229910017053 inorganic salt Inorganic materials 0.000 claims description 2
- 239000000725 suspension Substances 0.000 claims 1
- 239000010410 layer Substances 0.000 description 111
- 239000011148 porous material Substances 0.000 description 82
- 238000011282 treatment Methods 0.000 description 61
- 239000000243 solution Substances 0.000 description 52
- 239000000835 fiber Substances 0.000 description 40
- 239000012510 hollow fiber Substances 0.000 description 27
- 239000010408 film Substances 0.000 description 22
- 239000012530 fluid Substances 0.000 description 22
- 238000001704 evaporation Methods 0.000 description 17
- 239000002244 precipitate Substances 0.000 description 17
- 230000008020 evaporation Effects 0.000 description 16
- 230000035699 permeability Effects 0.000 description 16
- 238000012545 processing Methods 0.000 description 16
- 230000008569 process Effects 0.000 description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 9
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 9
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 9
- 229920002301 cellulose acetate Polymers 0.000 description 9
- 239000002131 composite material Substances 0.000 description 9
- 239000000178 monomer Substances 0.000 description 9
- 238000000576 coating method Methods 0.000 description 8
- 239000001307 helium Substances 0.000 description 8
- 229910052734 helium Inorganic materials 0.000 description 8
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 8
- 239000012466 permeate Substances 0.000 description 8
- 229920002492 poly(sulfone) Polymers 0.000 description 8
- 239000011159 matrix material Substances 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000009471 action Effects 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 238000000137 annealing Methods 0.000 description 5
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- KEQGZUUPPQEDPF-UHFFFAOYSA-N 1,3-dichloro-5,5-dimethylimidazolidine-2,4-dione Chemical compound CC1(C)N(Cl)C(=O)N(Cl)C1=O KEQGZUUPPQEDPF-UHFFFAOYSA-N 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- XTHPWXDJESJLNJ-UHFFFAOYSA-N chlorosulfonic acid Substances OS(Cl)(=O)=O XTHPWXDJESJLNJ-UHFFFAOYSA-N 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000000605 extraction Methods 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 238000009987 spinning Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 238000005345 coagulation Methods 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000011049 filling Methods 0.000 description 3
- XPFVYQJUAUNWIW-UHFFFAOYSA-N furfuryl alcohol Chemical compound OCC1=CC=CO1 XPFVYQJUAUNWIW-UHFFFAOYSA-N 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 3
- 239000004926 polymethyl methacrylate Substances 0.000 description 3
- 238000004382 potting Methods 0.000 description 3
- 238000000108 ultra-filtration Methods 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000013043 chemical agent Substances 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012527 feed solution Substances 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- HYBBIBNJHNGZAN-UHFFFAOYSA-N furfural Chemical compound O=CC1=CC=CO1 HYBBIBNJHNGZAN-UHFFFAOYSA-N 0.000 description 2
- JSRLCNHTWASAJT-UHFFFAOYSA-N helium;molecular nitrogen Chemical compound [He].N#N JSRLCNHTWASAJT-UHFFFAOYSA-N 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 239000012046 mixed solvent Substances 0.000 description 2
- 230000000877 morphologic effect Effects 0.000 description 2
- LYGJENNIWJXYER-UHFFFAOYSA-N nitromethane Chemical compound C[N+]([O-])=O LYGJENNIWJXYER-UHFFFAOYSA-N 0.000 description 2
- 229920002959 polymer blend Polymers 0.000 description 2
- 229920006254 polymer film Polymers 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 230000002269 spontaneous effect Effects 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 1
- 239000005751 Copper oxide Substances 0.000 description 1
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 229920002845 Poly(methacrylic acid) Polymers 0.000 description 1
- 229920004890 Triton X-100 Polymers 0.000 description 1
- 239000013504 Triton X-100 Substances 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 229910000431 copper oxide Inorganic materials 0.000 description 1
- OPQARKPSCNTWTJ-UHFFFAOYSA-L copper(ii) acetate Chemical compound [Cu+2].CC([O-])=O.CC([O-])=O OPQARKPSCNTWTJ-UHFFFAOYSA-L 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 238000007772 electroless plating Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- RBTKNAXYKSUFRK-UHFFFAOYSA-N heliogen blue Chemical compound [Cu].[N-]1C2=C(C=CC=C3)C3=C1N=C([N-]1)C3=CC=CC=C3C1=NC([N-]1)=C(C=CC=C3)C3=C1N=C([N-]1)C3=CC=CC=C3C1=N2 RBTKNAXYKSUFRK-UHFFFAOYSA-N 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 150000002895 organic esters Chemical class 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000006069 physical mixture Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910000108 silver(I,III) oxide Inorganic materials 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 230000003381 solubilizing effect Effects 0.000 description 1
- 239000012453 solvate Substances 0.000 description 1
- 238000000935 solvent evaporation Methods 0.000 description 1
- 239000011877 solvent mixture Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 239000011232 storage material Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000006277 sulfonation reaction Methods 0.000 description 1
- 229920001059 synthetic polymer Polymers 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- GPRLSGONYQIRFK-MNYXATJNSA-N triton Chemical compound [3H+] GPRLSGONYQIRFK-MNYXATJNSA-N 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0081—After-treatment of organic or inorganic membranes
- B01D67/0088—Physical treatment with compounds, e.g. swelling, coating or impregnation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/22—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion
- B01D53/228—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion characterised by specific membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0081—After-treatment of organic or inorganic membranes
- B01D67/0083—Thermal after-treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0081—After-treatment of organic or inorganic membranes
- B01D67/0093—Chemical modification
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/02—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor characterised by their properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2325/00—Details relating to properties of membranes
- B01D2325/02—Details relating to pores or porosity of the membranes
- B01D2325/022—Asymmetric membranes
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/890,383 US4784880A (en) | 1986-07-25 | 1986-07-25 | Method for modifying asymmetric membranes by endo-treating |
| US890383 | 1997-07-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6331507A JPS6331507A (ja) | 1988-02-10 |
| JPH0460691B2 true JPH0460691B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1992-09-28 |
Family
ID=25396598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62097645A Granted JPS6331507A (ja) | 1986-07-25 | 1987-04-22 | 乾燥不斉膜の処理法 |
Country Status (3)
Families Citing this family (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5342431A (en) * | 1989-10-23 | 1994-08-30 | Wisconsin Alumni Research Foundation | Metal oxide membranes for gas separation |
| US5269926A (en) * | 1991-09-09 | 1993-12-14 | Wisconsin Alumni Research Foundation | Supported microporous ceramic membranes |
| US5096586A (en) * | 1990-08-28 | 1992-03-17 | Regents Of The University Of California | Membranes having selective permeability |
| JP2768390B2 (ja) * | 1990-12-11 | 1998-06-25 | インターナショナル・ビジネス・マシーンズ・コーポレイション | 無電解金属付着のために基体をコンディショニングする方法 |
| JPH057749A (ja) * | 1991-04-15 | 1993-01-19 | Nitto Denko Corp | 含フツ素ポリイミド系複合膜あるいは非対称膜、これらの製造方法及びこれらを使用した気体分離・濃縮方法 |
| US5192308A (en) * | 1991-04-19 | 1993-03-09 | E. I. Du Pont De Nemours And Company | Vascular prosthesis with an elastomer coating |
| US5286280A (en) * | 1992-12-31 | 1994-02-15 | Hoechst Celanese Corporation | Composite gas separation membrane having a gutter layer comprising a crosslinked polar phenyl-containing - organopolysiloxane, and method for making the same - |
| US5387378A (en) * | 1993-04-21 | 1995-02-07 | Tulane University | Integral asymmetric fluoropolymer pervaporation membranes and method of making the same |
| WO1995002447A1 (en) * | 1993-07-16 | 1995-01-26 | E.I. Du Pont De Nemours And Company | Asymmetric membranes of polytetrafluoroethylene and their preparation |
| FR2710549B1 (fr) * | 1993-09-27 | 1996-06-21 | Inst Francais Du Petrole | Membranes asymétriques de haute sélectivité pour la séparation des gaz et un procédé pour leur fabrication. |
| EP0649675B1 (en) * | 1993-10-20 | 2001-12-19 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Treatment of gas separation membranes with inert solvent |
| US5514413A (en) * | 1994-03-31 | 1996-05-07 | Air Products And Chemicals, Inc. | Process for producing composite membranes |
| JPH09122461A (ja) * | 1995-10-31 | 1997-05-13 | Nitto Denko Corp | ポリイミド系半透膜 |
| JPH09225273A (ja) * | 1996-02-23 | 1997-09-02 | Nitto Denko Corp | 積層非対称膜及びその製造方法 |
| US5932361A (en) * | 1996-10-21 | 1999-08-03 | Belyakov; Vladimir Nikolaevich | Ceramic based membranes |
| US6039792A (en) * | 1997-06-24 | 2000-03-21 | Regents Of The University Of California And Bp Amoco Corporation | Methods of forming and using porous structures for energy efficient separation of light gases by capillary condensation |
| BR0007614B1 (pt) * | 1999-01-21 | 2010-10-19 | processo de preparação de membrana hidrofóbica integralmente assimétrica, e, membrana hidrofóbica. | |
| US6730145B1 (en) * | 2002-01-29 | 2004-05-04 | L'air Liquide Societe Anonyme | Treating gas separation membrane with aqueous reagent dispersion |
| JP4427291B2 (ja) * | 2003-09-03 | 2010-03-03 | 東亞合成株式会社 | 機能性膜の連続製造方法 |
| EP1731214A1 (de) * | 2005-06-06 | 2006-12-13 | Rochem RO-Wasserbehandlung GmbH | Abstandselement zur Führung von Strömungsmedien |
| US7575616B2 (en) * | 2006-02-10 | 2009-08-18 | Entegris, Inc. | Low-profile surface mount filter |
| US10384167B2 (en) | 2013-11-21 | 2019-08-20 | Oasys Water LLC | Systems and methods for improving performance of osmotically driven membrane systems |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL126633C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1958-02-24 | 1900-01-01 | ||
| US3524755A (en) * | 1966-11-23 | 1970-08-18 | Du Pont | Process for applying a coating composition to a microporous material |
| US4230463A (en) * | 1977-09-13 | 1980-10-28 | Monsanto Company | Multicomponent membranes for gas separations |
| EP0141793A1 (en) * | 1983-06-30 | 1985-05-15 | Monsanto Company | Asymmetric gas separation membranes having increased selectivy, and process for their production |
-
1986
- 1986-07-25 US US06/890,383 patent/US4784880A/en not_active Ceased
-
1987
- 1987-04-21 IL IL82262A patent/IL82262A0/xx unknown
- 1987-04-22 JP JP62097645A patent/JPS6331507A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6331507A (ja) | 1988-02-10 |
| US4784880A (en) | 1988-11-15 |
| IL82262A0 (en) | 1987-10-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0460691B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | ||
| CA1320318C (en) | Method for modifying asymmetric membranes by endo-treating | |
| US4127625A (en) | Process for preparing hollow fiber having selective gas permeability | |
| Dzinun et al. | Morphological study of co-extruded dual-layer hollow fiber membranes incorporated with different TiO2 loadings | |
| KR910001901B1 (ko) | 고침투성 복합공동섬유막의 피복방법 | |
| KR940006394B1 (ko) | 복합막과 이들의 제조방법 및 용도 | |
| EP0764461B1 (en) | Porous polysulfone membrane and process for producing the same | |
| US5228994A (en) | Composite microporous membranes | |
| CA1333028C (en) | Continuous process for making coated composite hollow fiber membranes | |
| JPH08141350A (ja) | 混合ガスの分離の選択性を強化する方法 | |
| JPH04310225A (ja) | ろ過、気体又は液体分離、蒸発分離装置用膜及びこのような膜の製造方法 | |
| JPH07506395A (ja) | ポリフッ化ビニリデン微孔質膜およびその製造方法 | |
| JPS6356802B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | ||
| US4980062A (en) | Inorganic membrane | |
| US4885092A (en) | Process for the manufacture of asymmetric, porous membranes and product thereof | |
| JPH0457371B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | ||
| Puri | Fabrication of hollow fibre gas separation membranes | |
| USRE34115E (en) | Method for modifying asymmetric membranes by endo-treating | |
| JPH0478729B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | ||
| US4865785A (en) | Process for the manufacture of asymmetric, porous membranes, and product thereof | |
| JPS5950364B2 (ja) | 限外「ろ」過膜およびその製造方法 | |
| JPH035847B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | ||
| US5320754A (en) | Pan composite membranes | |
| JPS63232806A (ja) | 二層膜の製法 | |
| EP0242209A1 (en) | Composite membranes |