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FR2359220A2 - Electrolytic prodn. of alkali metal carbonate - using two-compartment cell with fluorinated copolymer membrane - Google Patents

Electrolytic prodn. of alkali metal carbonate - using two-compartment cell with fluorinated copolymer membrane

Info

Publication number
FR2359220A2
FR2359220A2 FR7622194A FR7622194A FR2359220A2 FR 2359220 A2 FR2359220 A2 FR 2359220A2 FR 7622194 A FR7622194 A FR 7622194A FR 7622194 A FR7622194 A FR 7622194A FR 2359220 A2 FR2359220 A2 FR 2359220A2
Authority
FR
France
Prior art keywords
alkali metal
cell
copolymer
fluorinated copolymer
formulae
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.)
Granted
Application number
FR7622194A
Other languages
French (fr)
Other versions
FR2359220B2 (en
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.)
Diamond Shamrock Corp
Original Assignee
Diamond Shamrock 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 Diamond Shamrock Corp filed Critical Diamond Shamrock Corp
Priority to FR7622194A priority Critical patent/FR2359220A2/en
Publication of FR2359220A2 publication Critical patent/FR2359220A2/en
Application granted granted Critical
Publication of FR2359220B2 publication Critical patent/FR2359220B2/fr
Granted 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
    • C25B1/00—Electrolytic production of inorganic compounds or non-metals
    • C25B1/01—Products
    • C25B1/14—Alkali metal compounds
    • 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
    • C08J5/2218—Synthetic macromolecular compounds
    • C08J5/2231—Synthetic macromolecular compounds based on macromolecular compounds obtained by reactions involving unsaturated carbon-to-carbon bonds
    • C08J5/2237—Synthetic macromolecular compounds based on macromolecular compounds obtained by reactions involving unsaturated carbon-to-carbon bonds containing fluorine
    • 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
    • C08J5/2287—After-treatment
    • C08J5/2293—After-treatment of fluorine-containing 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
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Metallurgy (AREA)
  • Electrochemistry (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)

Abstract

Electrolytic prodn. of alkali metal carbonates is effected as described in the parent patent, by electrolysing an alkali metal chloride soln. at a current intensity >=0.155 A/cm2 in a cell with anode and cathode compartments sepd. by a semipermeable, cation-exchanging, hydraulically impermeable membrane made of a fluorinated copolymer, while CO2 is introduced into the cathod compartment. In this addition, (a) the copolymer contains repeating units of formulae (I) or (I') and -C(X')X-CF2 (II); and (b) the electrolysis conditions are such that the catholyte solids comprise =400 ppm of alkali metal chloride. In the formulae R is -CR'F-CF2-O-(CYF-CF2-O)-m; R' is F or 1-10C perfluoroalkyl; Y is F or CF3; m=1-3; n = 0 or 1; A is H, Na or K; D is H or the residue of an amine; X is F, Cl or CF3; X' is X or CF3(CF2)2-; z = 0-5; with the proviso that units of formula (I) and (I') are present in amts. such that the SO3H equiv. wt. is 1000-1400 (pref. 1050-1250) and the copolymer has a water-absorption capacity of >=15 wt.% at 100 degrees C. Process gives high purity prods. with high current efficiencies ( >= 95%). The current consumption is comparable with that of conventional diaphragm and mercury cells and the cell can be operated at high current densities (e.g. >=0.31 A0cm2) over long periods.
FR7622194A 1976-07-21 1976-07-21 Electrolytic prodn. of alkali metal carbonate - using two-compartment cell with fluorinated copolymer membrane Granted FR2359220A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7622194A FR2359220A2 (en) 1976-07-21 1976-07-21 Electrolytic prodn. of alkali metal carbonate - using two-compartment cell with fluorinated copolymer membrane

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7622194A FR2359220A2 (en) 1976-07-21 1976-07-21 Electrolytic prodn. of alkali metal carbonate - using two-compartment cell with fluorinated copolymer membrane

Publications (2)

Publication Number Publication Date
FR2359220A2 true FR2359220A2 (en) 1978-02-17
FR2359220B2 FR2359220B2 (en) 1979-01-19

Family

ID=9175956

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7622194A Granted FR2359220A2 (en) 1976-07-21 1976-07-21 Electrolytic prodn. of alkali metal carbonate - using two-compartment cell with fluorinated copolymer membrane

Country Status (1)

Country Link
FR (1) FR2359220A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2398120A2 (en) * 1977-07-19 1979-02-16 Diamond Shamrock Corp PRODUCTION OF CARBONATES FROM ALKALINE METALS IN AN ELECTROLYTIC MEMBRANE CELL

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1941847A1 (en) * 1968-12-31 1970-07-23 Bitterfeld Chemie Cation exchange diaphragm for electrolysis - cells
JPS5177452A (en) * 1974-12-26 1976-07-05 Toshiba Machine Co Ltd SAKUSHONBUREEDOOSONAETADA ATSUSHIIMA
FR2333824A1 (en) * 1975-08-29 1977-07-01 Asahi Glass Co Ltd CATION EXCHANGER FLUORINE MEMBRANE AND ITS APPLICATION FOR THE ELECTROLYSIS OF AN ALKALINE METAL HALOGENIDE
US4065366A (en) * 1975-10-17 1977-12-27 Asahi Glass Co., Ltd. Process for producing alkali metal hydroxide

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1941847A1 (en) * 1968-12-31 1970-07-23 Bitterfeld Chemie Cation exchange diaphragm for electrolysis - cells
JPS5177452A (en) * 1974-12-26 1976-07-05 Toshiba Machine Co Ltd SAKUSHONBUREEDOOSONAETADA ATSUSHIIMA
FR2333824A1 (en) * 1975-08-29 1977-07-01 Asahi Glass Co Ltd CATION EXCHANGER FLUORINE MEMBRANE AND ITS APPLICATION FOR THE ELECTROLYSIS OF AN ALKALINE METAL HALOGENIDE
US4065366A (en) * 1975-10-17 1977-12-27 Asahi Glass Co., Ltd. Process for producing alkali metal hydroxide
US4065366B1 (en) * 1975-10-17 1984-05-22

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NEANT *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2398120A2 (en) * 1977-07-19 1979-02-16 Diamond Shamrock Corp PRODUCTION OF CARBONATES FROM ALKALINE METALS IN AN ELECTROLYTIC MEMBRANE CELL

Also Published As

Publication number Publication date
FR2359220B2 (en) 1979-01-19

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