GB1364683A - Diaphragm and method of manufacturing the same - Google Patents
Diaphragm and method of manufacturing the sameInfo
- Publication number
- GB1364683A GB1364683A GB3565771A GB3565771A GB1364683A GB 1364683 A GB1364683 A GB 1364683A GB 3565771 A GB3565771 A GB 3565771A GB 3565771 A GB3565771 A GB 3565771A GB 1364683 A GB1364683 A GB 1364683A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sheet
- inorganic filler
- soluble salt
- ptfe
- produce
- 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
- 238000004519 manufacturing process Methods 0.000 title 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 abstract 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical group [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 abstract 2
- 238000009792 diffusion process Methods 0.000 abstract 2
- 239000011256 inorganic filler Substances 0.000 abstract 2
- 229910003475 inorganic filler Inorganic materials 0.000 abstract 2
- 239000012528 membrane Substances 0.000 abstract 2
- 239000004810 polytetrafluoroethylene Substances 0.000 abstract 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 abstract 2
- 150000003839 salts Chemical class 0.000 abstract 2
- 238000005406 washing Methods 0.000 abstract 2
- PEVRKKOYEFPFMN-UHFFFAOYSA-N 1,1,2,3,3,3-hexafluoroprop-1-ene;1,1,2,2-tetrafluoroethene Chemical group FC(F)=C(F)F.FC(F)=C(F)C(F)(F)F PEVRKKOYEFPFMN-UHFFFAOYSA-N 0.000 abstract 1
- 239000004698 Polyethylene Substances 0.000 abstract 1
- 239000006185 dispersion Substances 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 239000003014 ion exchange membrane Substances 0.000 abstract 1
- 239000004033 plastic Substances 0.000 abstract 1
- 229920003023 plastic Polymers 0.000 abstract 1
- -1 polyethylene Polymers 0.000 abstract 1
- 229920000573 polyethylene Polymers 0.000 abstract 1
- 229920000915 polyvinyl chloride Polymers 0.000 abstract 1
- 239000004800 polyvinyl chloride Substances 0.000 abstract 1
- 229920000131 polyvinylidene Polymers 0.000 abstract 1
- 230000003014 reinforcing effect Effects 0.000 abstract 1
- 239000011780 sodium chloride Substances 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B13/00—Diaphragms; Spacing elements
- C25B13/04—Diaphragms; Spacing elements characterised by the material
- C25B13/08—Diaphragms; Spacing elements characterised by the material based on organic materials
-
- 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
- B01D67/0004—Organic membrane manufacture by agglomeration of particles
-
- 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
- B01D67/0023—Organic membrane manufacture by inducing porosity into non porous precursor membranes
- B01D67/003—Organic membrane manufacture by inducing porosity into non porous precursor membranes by selective elimination of components, e.g. by leaching
-
- 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
- B01D69/10—Supported membranes; Membrane supports
- B01D69/107—Organic support material
- B01D69/1071—Woven, non-woven or net mesh
-
- 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
- B01D69/14—Dynamic membranes
- B01D69/141—Heterogeneous membranes, e.g. containing dispersed material; Mixed matrix membranes
- B01D69/148—Organic/inorganic mixed matrix membranes
-
- 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
- B01D71/30—Polyalkenyl halides
- B01D71/32—Polyalkenyl halides containing fluorine atoms
- B01D71/36—Polytetrafluoroethene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
- B29C67/20—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 for porous or cellular articles, e.g. of foam plastics, coarse-pored
- B29C67/202—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 for porous or cellular articles, e.g. of foam plastics, coarse-pored comprising elimination of a solid or a liquid ingredient
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/20—Manufacture of shaped structures of ion-exchange resins
- C08J5/22—Films, membranes or diaphragms
- C08J5/2206—Films, membranes or diaphragms based on organic and/or inorganic macromolecular compounds
- C08J5/2275—Heterogeneous membranes
- C08J5/2281—Heterogeneous membranes fluorine containing heterogeneous membranes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/28—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by elimination of a liquid phase from a macromolecular composition or article, e.g. drying of coagulum
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2323/00—Details relating to membrane preparation
- B01D2323/15—Use of additives
- B01D2323/21—Fillers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2325/00—Details relating to properties of membranes
- B01D2325/30—Chemical resistance
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2327/12—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C08J2327/18—Homopolymers or copolymers of tetrafluoroethylene
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Medicinal Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Polymers & Plastics (AREA)
- Metallurgy (AREA)
- Dispersion Chemistry (AREA)
- Mechanical Engineering (AREA)
- Electrochemistry (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
1364683 Diffusion membrane YUASA BATTERY CO Ltd 29 July 1971 [13 Aug 1970 25 Jan 1971] 35657/71 Heading B1X [Also in Divisions B5 and C3] To produce microporous diaphragms for use as diffusion membranes or ion exchange membranes, an aqueous dispersion of PTFE containing an inorganic filler and a powdered soluble salt is stirred and kneaded to produce a plastic solid which may then be shaped into a sheet, heating followed by washing of the sheet in water to remove the soluble salt which is preferably sodium chloride gives the porous article. A reinforcing net of tetrafluoroethylenehexafluoropropylene, PTFE, polyethylene, polyvinyl chloride, polyvinylidene may be rolled into the sheet before washing. The inorganic filler is preferably barium sulphate. Specification 1,081,046 is referred to.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7093170 | 1970-08-13 | ||
JP230371 | 1971-01-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1364683A true GB1364683A (en) | 1974-08-29 |
Family
ID=26335652
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3565771A Expired GB1364683A (en) | 1970-08-13 | 1971-07-29 | Diaphragm and method of manufacturing the same |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE2139646C3 (en) |
GB (1) | GB1364683A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4196070A (en) * | 1977-12-12 | 1980-04-01 | Nuclepore Corporation | Method for forming microporous fluorocarbon polymer sheet and product |
US4250002A (en) * | 1979-09-19 | 1981-02-10 | Hooker Chemicals & Plastics Corp. | Polymeric microporous separators for use in electrolytic processes and devices |
US4256845A (en) | 1979-02-15 | 1981-03-17 | Glasrock Products, Inc. | Porous sheets and method of manufacture |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1468355A (en) * | 1973-07-18 | 1977-03-23 | Ici Ltd | Making porous diaphragms in electrolytic cells |
FR2280435A1 (en) * | 1974-08-02 | 1976-02-27 | Rhone Poulenc Ind | PROCESS FOR OBTAINING A MICROPOREOUS MEMBRANE AND NEW PRODUCT THUS OBTAINED |
US4089758A (en) * | 1974-05-24 | 1978-05-16 | Imperial Chemical Industries Limited | Electrolytic process |
JPS53149881A (en) * | 1977-06-03 | 1978-12-27 | Asahi Glass Co Ltd | Strengthened cation exchange resin membrane and production thereof |
US4224130A (en) * | 1978-02-13 | 1980-09-23 | The Dow Chemical Company | Electrolytic diaphragm cell |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2593583A (en) * | 1951-03-14 | 1952-04-22 | Du Pont | Method for coagulating aqueous dispersions of polytetrafluoroethylene |
US3202626A (en) * | 1961-12-28 | 1965-08-24 | Vincent G Fitzsimmons | Modified polytetrafluoroethylene dispersions and solid products |
US3322710A (en) * | 1964-07-20 | 1967-05-30 | Haveg Industries Inc | Process for preparing uniform dispersions of fibrillated polytetrafluoroethylene particles in a thermosetting resin |
GB1081046A (en) * | 1965-08-31 | 1967-08-31 | Ici Ltd | Manufacture of porous diaphragms |
GB1169601A (en) * | 1967-01-25 | 1969-11-05 | American Cyanamid Co | Porous Polytetrafluoroethylene |
NL6818428A (en) * | 1967-12-29 | 1969-07-01 |
-
1971
- 1971-07-29 GB GB3565771A patent/GB1364683A/en not_active Expired
- 1971-08-07 DE DE2139646A patent/DE2139646C3/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4196070A (en) * | 1977-12-12 | 1980-04-01 | Nuclepore Corporation | Method for forming microporous fluorocarbon polymer sheet and product |
US4256845A (en) | 1979-02-15 | 1981-03-17 | Glasrock Products, Inc. | Porous sheets and method of manufacture |
US4250002A (en) * | 1979-09-19 | 1981-02-10 | Hooker Chemicals & Plastics Corp. | Polymeric microporous separators for use in electrolytic processes and devices |
Also Published As
Publication number | Publication date |
---|---|
DE2139646B2 (en) | 1976-04-01 |
DE2139646C3 (en) | 1981-05-21 |
DE2139646A1 (en) | 1972-02-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |