DE2514636A1 - Verfahren zur behandlung von membranen - Google Patents
Verfahren zur behandlung von membranenInfo
- Publication number
- DE2514636A1 DE2514636A1 DE19752514636 DE2514636A DE2514636A1 DE 2514636 A1 DE2514636 A1 DE 2514636A1 DE 19752514636 DE19752514636 DE 19752514636 DE 2514636 A DE2514636 A DE 2514636A DE 2514636 A1 DE2514636 A1 DE 2514636A1
- Authority
- DE
- Germany
- Prior art keywords
- acid
- solution
- membranes
- sulfonated polyaryl
- inorganic salt
- 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.)
- Pending
Links
- 239000012528 membrane Substances 0.000 title claims description 34
- 238000000034 method Methods 0.000 title claims description 18
- 238000011282 treatment Methods 0.000 title claims description 6
- 239000000243 solution Substances 0.000 claims description 21
- 229920000090 poly(aryl ether) Polymers 0.000 claims description 20
- 150000003457 sulfones Chemical class 0.000 claims description 17
- 238000001035 drying Methods 0.000 claims description 7
- 150000001735 carboxylic acids Chemical class 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 125000004432 carbon atom Chemical group C* 0.000 claims description 5
- AEMRFAOFKBGASW-UHFFFAOYSA-N Glycolic acid Chemical compound OCC(O)=O AEMRFAOFKBGASW-UHFFFAOYSA-N 0.000 claims description 4
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 claims description 4
- HHLFWLYXYJOTON-UHFFFAOYSA-N glyoxylic acid Chemical compound OC(=O)C=O HHLFWLYXYJOTON-UHFFFAOYSA-N 0.000 claims description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 4
- QBYIENPQHBMVBV-HFEGYEGKSA-N (2R)-2-hydroxy-2-phenylacetic acid Chemical compound O[C@@H](C(O)=O)c1ccccc1.O[C@@H](C(O)=O)c1ccccc1 QBYIENPQHBMVBV-HFEGYEGKSA-N 0.000 claims description 3
- BJEPYKJPYRNKOW-REOHCLBHSA-N (S)-malic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O BJEPYKJPYRNKOW-REOHCLBHSA-N 0.000 claims description 3
- IWYDHOAUDWTVEP-UHFFFAOYSA-N R-2-phenyl-2-hydroxyacetic acid Natural products OC(=O)C(O)C1=CC=CC=C1 IWYDHOAUDWTVEP-UHFFFAOYSA-N 0.000 claims description 3
- BJEPYKJPYRNKOW-UHFFFAOYSA-N alpha-hydroxysuccinic acid Natural products OC(=O)C(O)CC(O)=O BJEPYKJPYRNKOW-UHFFFAOYSA-N 0.000 claims description 3
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 239000001630 malic acid Substances 0.000 claims description 3
- 235000011090 malic acid Nutrition 0.000 claims description 3
- 229960002510 mandelic acid Drugs 0.000 claims description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical group C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 2
- 229910052708 sodium Inorganic materials 0.000 claims description 2
- 239000011734 sodium Substances 0.000 claims description 2
- 229910017053 inorganic salt Inorganic materials 0.000 claims 4
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims 3
- BWLBGMIXKSTLSX-UHFFFAOYSA-N 2-hydroxyisobutyric acid Chemical compound CC(C)(O)C(O)=O BWLBGMIXKSTLSX-UHFFFAOYSA-N 0.000 claims 2
- RGHNJXZEOKUKBD-SQOUGZDYSA-N D-gluconic acid Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=O RGHNJXZEOKUKBD-SQOUGZDYSA-N 0.000 claims 2
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 claims 2
- RGHNJXZEOKUKBD-UHFFFAOYSA-N D-gluconic acid Natural products OCC(O)C(O)C(O)C(O)C(O)=O RGHNJXZEOKUKBD-UHFFFAOYSA-N 0.000 claims 1
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims 1
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims 1
- 239000000174 gluconic acid Substances 0.000 claims 1
- 235000012208 gluconic acid Nutrition 0.000 claims 1
- 239000004310 lactic acid Substances 0.000 claims 1
- 235000014655 lactic acid Nutrition 0.000 claims 1
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 claims 1
- 239000011975 tartaric acid Substances 0.000 claims 1
- 235000002906 tartaric acid Nutrition 0.000 claims 1
- 230000015271 coagulation Effects 0.000 description 12
- 238000005345 coagulation Methods 0.000 description 12
- 229920000642 polymer Polymers 0.000 description 11
- 150000003839 salts Chemical class 0.000 description 7
- 238000001223 reverse osmosis Methods 0.000 description 6
- 125000000542 sulfonic acid group Chemical group 0.000 description 6
- 238000007654 immersion Methods 0.000 description 5
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- 239000012266 salt solution Substances 0.000 description 3
- 238000000108 ultra-filtration Methods 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- 238000005194 fractionation Methods 0.000 description 2
- 238000001879 gelation Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920000570 polyether Polymers 0.000 description 2
- 159000000000 sodium salts Chemical class 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 125000001424 substituent group Chemical group 0.000 description 2
- 238000006277 sulfonation reaction Methods 0.000 description 2
- 238000010257 thawing Methods 0.000 description 2
- IHZVFZOUXUNSPQ-UHFFFAOYSA-N 1-nitro-2-(2-nitrophenyl)sulfonylbenzene Chemical compound [O-][N+](=O)C1=CC=CC=C1S(=O)(=O)C1=CC=CC=C1[N+]([O-])=O IHZVFZOUXUNSPQ-UHFFFAOYSA-N 0.000 description 1
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 description 1
- CYDQOEWLBCCFJZ-UHFFFAOYSA-N 4-(4-fluorophenyl)oxane-4-carboxylic acid Chemical compound C=1C=C(F)C=CC=1C1(C(=O)O)CCOCC1 CYDQOEWLBCCFJZ-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical group 0.000 description 1
- 125000002947 alkylene group Chemical group 0.000 description 1
- 125000001118 alkylidene group Chemical group 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 125000002993 cycloalkylene group Chemical group 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 235000021060 food property Nutrition 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 125000000018 nitroso group Chemical group N(=O)* 0.000 description 1
- 229920000110 poly(aryl ether sulfone) Polymers 0.000 description 1
- 229920000412 polyarylene Polymers 0.000 description 1
- PHZLMBHDXVLRIX-UHFFFAOYSA-M potassium lactate Chemical compound [K+].CC(O)C([O-])=O PHZLMBHDXVLRIX-UHFFFAOYSA-M 0.000 description 1
- 239000001521 potassium lactate Substances 0.000 description 1
- 235000011085 potassium lactate Nutrition 0.000 description 1
- 229960001304 potassium lactate Drugs 0.000 description 1
- 159000000001 potassium salts Chemical class 0.000 description 1
- 125000004076 pyridyl group Chemical group 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- HELHAJAZNSDZJO-OLXYHTOASA-L sodium L-tartrate Chemical compound [Na+].[Na+].[O-]C(=O)[C@H](O)[C@@H](O)C([O-])=O HELHAJAZNSDZJO-OLXYHTOASA-L 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000001509 sodium citrate Substances 0.000 description 1
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 1
- 239000000176 sodium gluconate Substances 0.000 description 1
- 235000012207 sodium gluconate Nutrition 0.000 description 1
- 229940005574 sodium gluconate Drugs 0.000 description 1
- 229940023144 sodium glycolate Drugs 0.000 description 1
- SOEVVANXSDKPIY-UHFFFAOYSA-M sodium glyoxylate Chemical compound [Na+].[O-]C(=O)C=O SOEVVANXSDKPIY-UHFFFAOYSA-M 0.000 description 1
- 239000001540 sodium lactate Substances 0.000 description 1
- 235000011088 sodium lactate Nutrition 0.000 description 1
- 229940005581 sodium lactate Drugs 0.000 description 1
- 239000001433 sodium tartrate Substances 0.000 description 1
- 229960002167 sodium tartrate Drugs 0.000 description 1
- 235000011004 sodium tartrates Nutrition 0.000 description 1
- -1 tartaric acid 2-hydroxy-isobutyric acid Chemical compound 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 description 1
- JEJAMASKDTUEBZ-UHFFFAOYSA-N tris(1,1,3-tribromo-2,2-dimethylpropyl) phosphate Chemical compound BrCC(C)(C)C(Br)(Br)OP(=O)(OC(Br)(Br)C(C)(C)CBr)OC(Br)(Br)C(C)(C)CBr JEJAMASKDTUEBZ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/66—Polymers having sulfur in the main chain, with or without nitrogen, oxygen or carbon only
- B01D71/68—Polysulfones; Polyethersulfones
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/08—Prevention of membrane fouling or of concentration polarisation
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G75/00—Macromolecular compounds obtained by reactions forming a linkage containing sulfur with or without nitrogen, oxygen, or carbon in the main chain of the macromolecule
- C08G75/20—Polysulfones
- C08G75/23—Polyethersulfones
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/16—Use of chemical agents
- B01D2321/162—Use of acids
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Polymers With Sulfur, Phosphorus Or Metals In The Main Chain (AREA)
- Polyethers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7411767A FR2266532B1 (enExample) | 1974-04-03 | 1974-04-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2514636A1 true DE2514636A1 (de) | 1975-10-09 |
Family
ID=9137221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19752514636 Pending DE2514636A1 (de) | 1974-04-03 | 1975-04-03 | Verfahren zur behandlung von membranen |
Country Status (13)
| Country | Link |
|---|---|
| US (1) | US3994860A (enExample) |
| JP (1) | JPS5110898A (enExample) |
| BE (1) | BE827470A (enExample) |
| CH (1) | CH591881A5 (enExample) |
| DE (1) | DE2514636A1 (enExample) |
| ES (1) | ES436257A1 (enExample) |
| FR (1) | FR2266532B1 (enExample) |
| GB (1) | GB1462546A (enExample) |
| IL (1) | IL46977A0 (enExample) |
| IT (1) | IT1034818B (enExample) |
| LU (1) | LU72193A1 (enExample) |
| NL (1) | NL7503639A (enExample) |
| ZA (1) | ZA752084B (enExample) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3043073A1 (de) * | 1980-11-14 | 1982-06-09 | Dr. Eduard Fresenius, Chemisch-pharmazeutische Industrie KG, 6380 Bad Homburg | Filtrationsmembran und verfahren zur hydrophilierung |
| EP0165077A3 (en) * | 1984-06-15 | 1988-07-20 | Nitto Electric Industrial Co., Ltd. | Sulfonated polysulfone composite semipermeable membranes and process for their production |
| EP0575704A1 (de) * | 1992-06-23 | 1993-12-29 | GAMBRO DIALYSATOREN GmbH & CO. KG | Verfahren zum Trocknen poröser Ultrafiltrationsmembranen |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53149181A (en) * | 1977-06-01 | 1978-12-26 | Daicel Chem Ind Ltd | Semipermeable membrane |
| JPS5416378A (en) * | 1977-07-08 | 1979-02-06 | Asahi Chem Ind Co Ltd | Polysulfone semipermeable membrane |
| EP0029633B1 (en) | 1978-09-05 | 1983-10-05 | Imperial Chemical Industries Plc | Polyarylethersulphone copolymers |
| US4521224A (en) * | 1982-03-12 | 1985-06-04 | The Standard Oil Company | Semipermeable membranes prepared from polymers containing pendent sulfone groups |
| US4427419A (en) | 1982-03-12 | 1984-01-24 | The Standard Oil Company | Semipermeable membranes prepared from polymers containing pendent sulfone groups |
| US4414368A (en) * | 1982-12-27 | 1983-11-08 | Albany International Corp. | Chlorosulfonated polysulfones and derivatives thereof |
| GB8331198D0 (en) * | 1983-11-23 | 1983-12-29 | Ici Plc | Membranes |
| US4699634A (en) * | 1985-07-08 | 1987-10-13 | The Standard Oil Company | Process for the modification of aromatic polymers via phase transfer catalysis to produce polyarylene polymers and the use thereof |
| US4717395A (en) * | 1986-08-07 | 1988-01-05 | The Dow Chemical Company | Gas separations using membranes comprising sulphonated polyether sulphone |
| US4990252A (en) * | 1987-02-04 | 1991-02-05 | Hydanautics | Stable membranes from sulfonated polyarylethers |
| US5788862A (en) * | 1992-05-13 | 1998-08-04 | Pall Corporation | Filtration medium |
| US5480554A (en) * | 1992-05-13 | 1996-01-02 | Pall Corporation | Integrity-testable wet-dry-reversible ultrafiltration membranes and method for testing same |
| EP0604883A3 (de) * | 1992-12-30 | 1995-02-15 | Hoechst Ag | Verfahren zur Herstellung poröser, hydrophiler Membrane. |
| US5624965A (en) * | 1994-04-26 | 1997-04-29 | The Graver Company | Arylenedialkylidene polymers for high performance ion exchange membranes |
| DE60333161D1 (de) * | 2003-04-10 | 2010-08-12 | X Flow Bv | Verfahren zum Trocknen einer feuchten porösen Membranstruktur |
| US9533254B2 (en) * | 2013-11-01 | 2017-01-03 | Virginia Tech Intellectual Properties, Inc. | Crosslinked polymer compositions, gas separation membranes of such crosslinked polymer compositions, methods of making such membranes, and methods of separating gases using such membranes |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2040950A5 (enExample) * | 1969-04-30 | 1971-01-22 | Rhone Poulenc Sa | |
| US3717594A (en) * | 1970-01-19 | 1973-02-20 | Ecodyne Corp | Stabilizing cation resins |
| FR2138333B1 (enExample) * | 1971-05-24 | 1974-03-08 | Rhone Poulenc Sa | |
| BE795743A (fr) * | 1972-03-15 | 1973-06-18 | Politechnika Warszawska | Procede de preparation de feuilles et de revetements a base de polyarylates, et produits obtenus |
| US3875096A (en) * | 1974-03-20 | 1975-04-01 | Us Interior | Process for the preparation of a stable salt form of a sulfonated polyarylether sulfone |
-
1974
- 1974-04-03 FR FR7411767A patent/FR2266532B1/fr not_active Expired
-
1975
- 1975-03-26 NL NL7503639A patent/NL7503639A/xx not_active Application Discontinuation
- 1975-03-31 IL IL46977A patent/IL46977A0/xx unknown
- 1975-04-02 BE BE155014A patent/BE827470A/xx unknown
- 1975-04-02 LU LU72193A patent/LU72193A1/xx unknown
- 1975-04-02 US US05/564,360 patent/US3994860A/en not_active Expired - Lifetime
- 1975-04-02 ZA ZA00752084A patent/ZA752084B/xx unknown
- 1975-04-02 JP JP50040211A patent/JPS5110898A/ja active Pending
- 1975-04-02 GB GB1349675A patent/GB1462546A/en not_active Expired
- 1975-04-02 CH CH416275A patent/CH591881A5/xx not_active IP Right Cessation
- 1975-04-03 DE DE19752514636 patent/DE2514636A1/de active Pending
- 1975-04-03 IT IT21968/75A patent/IT1034818B/it active
- 1975-04-03 ES ES436257A patent/ES436257A1/es not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3043073A1 (de) * | 1980-11-14 | 1982-06-09 | Dr. Eduard Fresenius, Chemisch-pharmazeutische Industrie KG, 6380 Bad Homburg | Filtrationsmembran und verfahren zur hydrophilierung |
| EP0165077A3 (en) * | 1984-06-15 | 1988-07-20 | Nitto Electric Industrial Co., Ltd. | Sulfonated polysulfone composite semipermeable membranes and process for their production |
| EP0575704A1 (de) * | 1992-06-23 | 1993-12-29 | GAMBRO DIALYSATOREN GmbH & CO. KG | Verfahren zum Trocknen poröser Ultrafiltrationsmembranen |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5110898A (enExample) | 1976-01-28 |
| FR2266532A1 (enExample) | 1975-10-31 |
| CH591881A5 (enExample) | 1977-10-14 |
| NL7503639A (nl) | 1975-10-07 |
| US3994860A (en) | 1976-11-30 |
| ZA752084B (en) | 1976-02-25 |
| IT1034818B (it) | 1979-10-10 |
| IL46977A0 (en) | 1975-06-25 |
| ES436257A1 (es) | 1977-02-01 |
| FR2266532B1 (enExample) | 1976-12-17 |
| BE827470A (fr) | 1975-10-02 |
| GB1462546A (en) | 1977-01-26 |
| LU72193A1 (enExample) | 1976-03-02 |
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