GB1498733A - Diaphragms for electrolytic cells - Google Patents

Diaphragms for electrolytic cells

Info

Publication number
GB1498733A
GB1498733A GB21594/75A GB2159475A GB1498733A GB 1498733 A GB1498733 A GB 1498733A GB 21594/75 A GB21594/75 A GB 21594/75A GB 2159475 A GB2159475 A GB 2159475A GB 1498733 A GB1498733 A GB 1498733A
Authority
GB
United Kingdom
Prior art keywords
cathode
asbestos
slurry
polymer
coated
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
GB21594/75A
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.)
Occidental Chemical Corp
Original Assignee
Hooker Chemicals and Plastics Corp
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 Hooker Chemicals and Plastics Corp filed Critical Hooker Chemicals and Plastics Corp
Publication of GB1498733A publication Critical patent/GB1498733A/en
Expired legal-status Critical Current

Links

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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Electrolytic Production Of Metals (AREA)

Abstract

1498733 Asbestos coated cathode HOOKER CHEMICALS & PLASTICS CORP 20 May 1975 [9 April 1975] 21594/75 Heading C7B [Also in Division B2] A diaphragm-coated cathode for an electrolytic cell, comprising a foraminous cathode bearing on the cathodically active surfaces thereof an adherent and coherent dimensionally stable diaphragm consisting essentially of asbestos fibres bound together with a discontinuous polymer coating, the concentration of polymer decreasing from the outer surface of the diaphragm to the cathode-diaphragm interface, is produced by placing a foraminous cathode member in a slurry of asbestos fibres and drawing a layer of asbestos on to the cathode by suction through the cathode, removing the coated cathode from the slurry while maintaining suction to abstract slurry liquid from the asbestos layer, placing the coated cathode in a slurry of thermoplastic polymer particles ranging in size between 0À2 and 100 microns, drawing polymer particles into the asbestos layer by suction through the coated cathode, removing the cathode from the polymer slurry and heating it to a temperature sufficient to soften the polymer particles and thus join adjacent asbestos fibres together, and then cooling the coated cathode. The cathode member may be in the form of a can or box of wire mesh, foraminous sheet metal, expanded metal or woven metal. The asbestos slurry may be in water or solutions of brine or other cell liquor, and suitably is applied at a thickness of 25-125 mms, i.e. 0À18-0À3, preferably 0À22-0À26 pounds per square foot. Preferred polymers are fluorine-containing polymers having a softening point between 105‹C and 400‹C, e.g. polytetrafluoroethylene, polyhexafluoropropylene, polychlorotrifluoroethylene, polyvinylidene fluoride, alone or as copolymers with each other or with ethylene vinyl chloride or other hydrocarbon monomers. The preferred polymer is polyvinylidene fluoride or a 1:1 copolymer of ethylene and chlorotrifluoroethylene. The polymer slurry may contain a wetting agent, preferably non-ionic, and is drawn into the asbestos layer until a polymer concentration of 1-20% of the weight of asbestos is reached. The coated cathodes may be used in chlor-alkali cells for electrolysis of brine.
GB21594/75A 1975-04-09 1975-05-20 Diaphragms for electrolytic cells Expired GB1498733A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US56648875A 1975-04-09 1975-04-09

Publications (1)

Publication Number Publication Date
GB1498733A true GB1498733A (en) 1978-01-25

Family

ID=24263101

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21594/75A Expired GB1498733A (en) 1975-04-09 1975-05-20 Diaphragms for electrolytic cells

Country Status (16)

Country Link
AR (1) AR206735A1 (en)
BE (1) BE837147A (en)
BR (1) BR7508343A (en)
CA (1) CA1027898A (en)
DE (1) DE2523508A1 (en)
ES (1) ES442372A1 (en)
FI (1) FI61920C (en)
FR (1) FR2307057A1 (en)
GB (1) GB1498733A (en)
IT (1) IT1058681B (en)
MX (1) MX3129E (en)
NL (1) NL7603620A (en)
NO (1) NO148342C (en)
PL (1) PL98613B1 (en)
SE (1) SE7507524L (en)
ZA (1) ZA753784B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0048617A1 (en) * 1980-09-22 1982-03-31 Eltech Systems Corporation Improved dimensionally stable asbestos-polytetrafluoroethylene diaphragms for chlor-alkali electrolytic cells
US4447566A (en) * 1983-01-27 1984-05-08 Eltech Systems Corp. Modified liquid permeable asbestos diaphragms with improved dimensional stability
GB2149565A (en) * 1983-11-02 1985-06-12 Raychem Ltd Protected metal components
US4665120A (en) * 1983-01-27 1987-05-12 Eltech Systems Corporation Modified liquid permeable asbestos diaphragms with improved dimensional stability

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4186065A (en) * 1978-04-27 1980-01-29 Ppg Industries, Inc. Method of preparing a resin-containing asbestos diaphragm
DE3144372A1 (en) * 1981-11-07 1983-05-19 Chemische Werke Hüls AG, 4370 Marl METHOD FOR PRODUCING A DIAPHRAGM FOR ELECTROLYSIS CELLS
US4741813A (en) * 1986-12-15 1988-05-03 Oxytech Systems, Inc. Diaphragm for an electrolytic cell

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4832515B1 (en) * 1970-08-13 1973-10-06

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0048617A1 (en) * 1980-09-22 1982-03-31 Eltech Systems Corporation Improved dimensionally stable asbestos-polytetrafluoroethylene diaphragms for chlor-alkali electrolytic cells
US4447566A (en) * 1983-01-27 1984-05-08 Eltech Systems Corp. Modified liquid permeable asbestos diaphragms with improved dimensional stability
US4665120A (en) * 1983-01-27 1987-05-12 Eltech Systems Corporation Modified liquid permeable asbestos diaphragms with improved dimensional stability
GB2149565A (en) * 1983-11-02 1985-06-12 Raychem Ltd Protected metal components
US4615961A (en) * 1983-11-02 1986-10-07 Raychem Corporation Protected metal components

Also Published As

Publication number Publication date
AU8075175A (en) 1976-11-04
DE2523508A1 (en) 1976-10-21
CA1027898A (en) 1978-03-14
NO148342C (en) 1983-09-21
NO148342B (en) 1983-06-13
FI61920C (en) 1982-10-11
FR2307057A1 (en) 1976-11-05
ZA753784B (en) 1976-05-26
BR7508343A (en) 1977-09-27
NL7603620A (en) 1976-10-12
IT1058681B (en) 1982-05-10
FR2307057B1 (en) 1979-04-20
ES442372A1 (en) 1977-04-16
PL98613B1 (en) 1978-05-31
AR206735A1 (en) 1976-08-13
FI751624A (en) 1976-10-10
SE7507524L (en) 1976-10-10
NO753734L (en) 1976-10-12
BE837147A (en) 1976-06-29
MX3129E (en) 1980-04-28
FI61920B (en) 1982-06-30

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Legal Events

Date Code Title Description
CSNS Application of which complete specification have been accepted and published, but patent is not sealed