FR72142E - Porous membranes and method of manufacturing these membranes - Google Patents

Porous membranes and method of manufacturing these membranes

Info

Publication number
FR72142E
FR72142E FR72142DA FR72142E FR 72142 E FR72142 E FR 72142E FR 72142D A FR72142D A FR 72142DA FR 72142 E FR72142 E FR 72142E
Authority
FR
France
Prior art keywords
paste
plasticizer
fabric
benzene
polytetrafluoroethylene
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
Application number
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
Commissariat a lEnergie Atomique CEA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Commissariat a lEnergie Atomique CEA filed Critical Commissariat a lEnergie Atomique CEA
Application granted granted Critical
Publication of FR72142E publication Critical patent/FR72142E/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/10—Filter screens essentially made of metal
    • B01D39/12—Filter screens essentially made of metal of wire gauze; of knitted wire; of expanded metal
    • 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
    • B01D67/0079—Manufacture of membranes comprising organic and inorganic components
    • 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
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/06—Fibrous reinforcements only
    • B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
    • B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
    • B29C70/20—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in a single direction, e.g. roofing or other parallel fibres
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/05—Alcohols; Metal alcoholates

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Textile Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Composite Materials (AREA)
  • Mechanical Engineering (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Laminated Bodies (AREA)
  • Cell Separators (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

867,939. Coated metallic fabrics. COMMISSARIAT A L'ENERGIE ATOMIQUE. July 21, 1958 [Aug. 1, 1957], No. 23365/58. Addition to 849,837. Class 140. A porous membrane is produced by coating a corrosion resistant metallic fabric with a moist paste containing fluorohydrocarbon, or chlorofluorohydrocarbon polymers, or halogen substituted hydrocarbon greases, or waxes, and subjecting the fabric thus coated to an adhering treatment in particular by rolling, said paste containing as a plasticizer liquid paraffin per se or in solution in a solvent such as benzene. The plasticizer may be incorporated in an emulsion of polytetrafluoroethylene and the emulsion coagulated by acetone, the precipitate formed constituting the paste to be applied to the fabric, or the plasticizer may be intimately mixed with a powder of polytetrafluoroethylene, the mixture thus obtained constituting the paste. The paste may be formed by intimately mixing 100 gm. polytetrafluoroethylene powder, 20 to 60 c.c. liquid paraffin per se, or from 40 to 80 c.c. of a solution containing from 50 to 80% of liquid paraffin in benzene. The plasticizer may be eliminated by dripping, drying and/or washing with a suitable solvent, e.g. benzene. The metallic fabric may be a very fine nickel grid which may be obtained by electrolytic deposition.
FR72142D 1956-05-22 1957-08-01 Porous membranes and method of manufacturing these membranes Expired FR72142E (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR714914 1956-05-22
FR72142T 1957-08-01

Publications (1)

Publication Number Publication Date
FR72142E true FR72142E (en) 1960-08-05

Family

ID=37663315

Family Applications (1)

Application Number Title Priority Date Filing Date
FR72142D Expired FR72142E (en) 1956-05-22 1957-08-01 Porous membranes and method of manufacturing these membranes

Country Status (5)

Country Link
BE (1) BE569432A (en)
FR (1) FR72142E (en)
GB (1) GB867939A (en)
LU (1) LU36265A1 (en)
NL (1) NL112914C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102641621A (en) * 2011-02-22 2012-08-22 苏州市东方净水器厂 Manufacturing technology of tetrafluoroethylene membrane filter element

Also Published As

Publication number Publication date
GB867939A (en) 1961-05-10
NL112914C (en)
LU36265A1 (en)
BE569432A (en)

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