GB1238180A - - Google Patents
Info
- Publication number
- GB1238180A GB1238180A GB1238180DA GB1238180A GB 1238180 A GB1238180 A GB 1238180A GB 1238180D A GB1238180D A GB 1238180DA GB 1238180 A GB1238180 A GB 1238180A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diluent
- polymer
- membrane
- dmf
- sept
- 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
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 abstract 12
- 239000003085 diluting agent Substances 0.000 abstract 5
- 229920000642 polymer Polymers 0.000 abstract 5
- 239000012528 membrane Substances 0.000 abstract 4
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 abstract 2
- 239000003960 organic solvent Substances 0.000 abstract 2
- 239000011148 porous material Substances 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 2
- 229920002821 Modacrylic Polymers 0.000 abstract 1
- 239000010410 layer Substances 0.000 abstract 1
- 239000012982 microporous membrane Substances 0.000 abstract 1
- 239000003607 modifier Substances 0.000 abstract 1
- 229920002492 poly(sulfone) Polymers 0.000 abstract 1
- 229920000379 polypropylene carbonate Polymers 0.000 abstract 1
- 238000001556 precipitation Methods 0.000 abstract 1
- 239000002904 solvent Substances 0.000 abstract 1
- 239000002344 surface layer Substances 0.000 abstract 1
- 229920005613 synthetic organic polymer Polymers 0.000 abstract 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
- B01D71/76—Macromolecular material not specifically provided for in a single one of groups B01D71/08 - B01D71/74
-
- 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
- B01D67/0002—Organic membrane manufacture
- B01D67/0009—Organic membrane manufacture by phase separation, sol-gel transition, evaporation or solvent quenching
-
- 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
- B01D2325/22—Thermal or heat-resistance properties
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Laminated Bodies (AREA)
Abstract
1,238,180. Microporous membranes. AMICON CORP. 12 Sept., 1968 [21 Sept., 1967], No. 43335/68. Heading B5B. An integral, anisotropic, microporous membrane of a synthetic organic polymer which absorbs less than 10% water at 100% R.H. and 25 C. has a surface layer having a plurality of pores of diameter 1-1000 mÁ and preferably a thickness of 0À1-5À0 Á, and a support layer of sufficiently large pore structure that it provides no significant overall resistance to hydraulic flow through the membrane. The polymer may be 5-90% crystalline with a Tg of at least 20 C. The membrane is made by preferentially contacting one side of a cast film of an organic solution of the polymer with a diluent highly compatible with the organic solvent and sufficiently incompatible with the polymer to cause immediate precipitation thereof, and maintaining the membrane thus formed in contact with the diluent until substantially all of the solvent has been replaced by the diluent. Many polymers are listed; these are preferably polar. The following are exemplified; poly-(bisphenol A carbonate) in dimethylformamide (DMF), PVC in DMF*, a modacrylic polymer in DMF* and a polysulphone in N-methyl-2- pyrrolidone. The diluent is water. A " solution modifier " may be added, which alters the solvating effect of the diluent or organic solvent, e.g. ZnCl 2 is added to the solutions * above.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US66964867A | 1967-09-21 | 1967-09-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1238180A true GB1238180A (en) | 1971-07-07 |
Family
ID=24687156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1238180D Expired GB1238180A (en) | 1967-09-21 | 1968-09-12 |
Country Status (13)
| Country | Link |
|---|---|
| JP (1) | JPS5022508B1 (en) |
| BE (1) | BE721058A (en) |
| BR (1) | BR6802466D0 (en) |
| CH (1) | CH526978A (en) |
| DE (1) | DE1794191B2 (en) |
| DK (1) | DK145564C (en) |
| ES (1) | ES358342A1 (en) |
| FI (1) | FI50064C (en) |
| FR (1) | FR1584659A (en) |
| GB (1) | GB1238180A (en) |
| NL (1) | NL161988B (en) |
| PL (1) | PL88875B1 (en) |
| SE (1) | SE369377B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2671628A4 (en) * | 2011-01-31 | 2016-11-23 | Toray Industries | Separation membrane for water treatment and production method for same |
| CN112442749A (en) * | 2019-08-27 | 2021-03-05 | 中国石油化工股份有限公司 | Preparation method and application of fiber material |
| EP3639913A4 (en) * | 2017-06-15 | 2021-04-14 | Kaneka Corporation | POROUS MEMBRANE FOR USE IN WATER TREATMENT |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1396091A (en) * | 1971-02-18 | 1975-05-29 | Babcock & Wilcox Ltd | Semi-permeable membranes |
| JPS523343B2 (en) * | 1972-04-28 | 1977-01-27 | ||
| FR2265454A2 (en) * | 1974-03-26 | 1975-10-24 | Uhde Gmbh Friedrich | Polyether-polycarbonate block copolymer films - esp for haemodialysis made by casting from soln |
| JPS5193786A (en) * | 1975-02-15 | 1976-08-17 | Makurokagatano chukuseni | |
| NZ184767A (en) * | 1976-08-05 | 1980-03-05 | Tecneco Spa | Assymetric membranes from fluorinated polymeric materials |
| US4087388A (en) * | 1976-10-21 | 1978-05-02 | E. I. Du Pont De Nemours And Company | Process of preparing a permselective membrane |
| US4203847A (en) * | 1977-05-25 | 1980-05-20 | Millipore Corporation | Making porous membranes and the membrane products |
| JPS5416378A (en) * | 1977-07-08 | 1979-02-06 | Asahi Chem Ind Co Ltd | Polysulfone semipermeable membrane |
| JPS5827963B2 (en) * | 1979-05-17 | 1983-06-13 | 日東電工株式会社 | Method for manufacturing selectively permeable membrane |
| CA1202837A (en) * | 1980-03-14 | 1986-04-08 | Wolfgang J. Wrasidlo | Asymmetric membranes and process therefor |
| US4774039A (en) * | 1980-03-14 | 1988-09-27 | Brunswick Corporation | Dispersing casting of integral skinned highly asymmetric polymer membranes |
| DE3028213C2 (en) * | 1980-07-25 | 1990-12-06 | Akzo Gmbh, 5600 Wuppertal | Process for the production of an ultrafiltration membrane made of polyamide and a membrane produced therefrom |
-
1968
- 1968-09-12 GB GB1238180D patent/GB1238180A/en not_active Expired
- 1968-09-18 BE BE721058D patent/BE721058A/xx not_active IP Right Cessation
- 1968-09-19 BR BR202466/68A patent/BR6802466D0/en unknown
- 1968-09-19 NL NL6813415.A patent/NL161988B/en not_active Application Discontinuation
- 1968-09-19 FI FI682644A patent/FI50064C/en active
- 1968-09-20 DK DK455368A patent/DK145564C/en not_active IP Right Cessation
- 1968-09-20 FR FR1584659D patent/FR1584659A/fr not_active Expired
- 1968-09-20 ES ES358342A patent/ES358342A1/en not_active Expired
- 1968-09-20 DE DE1794191A patent/DE1794191B2/en not_active Ceased
- 1968-09-20 JP JP43067719A patent/JPS5022508B1/ja active Pending
- 1968-09-20 CH CH1410568A patent/CH526978A/en not_active IP Right Cessation
- 1968-09-20 SE SE12753/68A patent/SE369377B/xx unknown
- 1968-09-21 PL PL1968129185A patent/PL88875B1/pl unknown
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2671628A4 (en) * | 2011-01-31 | 2016-11-23 | Toray Industries | Separation membrane for water treatment and production method for same |
| EP3639913A4 (en) * | 2017-06-15 | 2021-04-14 | Kaneka Corporation | POROUS MEMBRANE FOR USE IN WATER TREATMENT |
| US11224844B2 (en) | 2017-06-15 | 2022-01-18 | Kaneka Corporation | Porous membrane for water treatment use |
| CN112442749A (en) * | 2019-08-27 | 2021-03-05 | 中国石油化工股份有限公司 | Preparation method and application of fiber material |
| CN112442749B (en) * | 2019-08-27 | 2023-04-11 | 中国石油化工股份有限公司 | Preparation method and application of fiber material |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1584659A (en) | 1969-12-26 |
| SE369377B (en) | 1974-08-26 |
| DK145564C (en) | 1983-05-16 |
| NL6813415A (en) | 1969-03-25 |
| BE721058A (en) | 1969-03-03 |
| DE1794191B2 (en) | 1974-04-25 |
| NL161988B (en) | 1979-11-15 |
| ES358342A1 (en) | 1970-06-01 |
| DK145564B (en) | 1982-12-13 |
| BR6802466D0 (en) | 1973-05-10 |
| CH526978A (en) | 1972-08-31 |
| PL88875B1 (en) | 1976-10-30 |
| FI50064B (en) | 1975-09-01 |
| FI50064C (en) | 1975-12-10 |
| DE1794191A1 (en) | 1971-03-18 |
| JPS5022508B1 (en) | 1975-07-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| 732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
| PE20 | Patent expired after termination of 20 years |
