EP0245133B1 - Fonctionnalisation de iodo-polyfluoroalcanes par réduction électrochimique et nouveaux composés fluorés ainsi obtenus - Google Patents

Fonctionnalisation de iodo-polyfluoroalcanes par réduction électrochimique et nouveaux composés fluorés ainsi obtenus Download PDF

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Publication number
EP0245133B1
EP0245133B1 EP87400768A EP87400768A EP0245133B1 EP 0245133 B1 EP0245133 B1 EP 0245133B1 EP 87400768 A EP87400768 A EP 87400768A EP 87400768 A EP87400768 A EP 87400768A EP 0245133 B1 EP0245133 B1 EP 0245133B1
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EP
European Patent Office
Prior art keywords
process according
iodo
cooh
water
ppm
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
EP87400768A
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German (de)
English (en)
French (fr)
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EP0245133A1 (fr
Inventor
Sylvie Résidence Le Prieuré Benefice-Malouet
Patrick Calas
Hubert Blancou
Auguste Commeyras
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.)
Arkema France SA
Original Assignee
Atochem SA
Elf Atochem SA
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Publication date
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Publication of EP0245133A1 publication Critical patent/EP0245133A1/fr
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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
    • C25B3/00—Electrolytic production of organic compounds
    • C25B3/20—Processes
    • C25B3/25—Reduction

Definitions

  • the present invention relates to the preparation of compounds containing a perfluorinated chain and at least one acid or alcohol function by electrochemical reduction of iodo-polyfluoralcanes.
  • Polyfluorinated alcohols of type R F CH 2 CH 2 0H where R F denotes a perfluoroalkyl radical are precursors of surface treatment agents and materials and can be prepared from iodo-1 perfluoroalkyl-2 ethanes R F C 2 H 4 1 according to various routes, for example, by the action of an amide in aqueous solution (publication JP 72-37520) or by the action of a sulfuric oleum (US Patent 3,283,012) or also by formation in tributylphosphate an intermediate organozinc which is then oxidized and then hydrolyzed (patent FR 2,521,987).
  • the synthesis of these alcohols by electrochemical reduction of the compounds R F C 2 H 4 1 has not yet been envisaged.
  • the invention now relates to a process for the preparation of compounds containing a perfluorinated chain and at least one acid or alcohol function by electrochemical reduction of iodo-polyfluoroalkanes, characterized in that this reduction is carried out in a solvent of the formamide type on a cathode carbon, possibly in the presence of sulfur dioxide or in the presence of water and sulfur dioxide.
  • the solvent in which the electrochemical reduction according to the invention is carried out may be the formamide itself or an N-substituted derivative of the latter, such as methylformamide or, preferably, dimethylformamide.
  • this solvent can be used in mixture with water, provided that the proportion of water does not exceed 70% by volume and preferably remains less than 30% by volume .
  • the water content of the solvent plays an important role in the nature of the functional fluorinated derivatives formed in accordance with the process according to the invention.
  • the carbon cathode used according to the invention can consist of carbon fibers, woven or nonwoven, or by a glassy carbon plate.
  • an activator chosen from allyl alcohol, propargyl alcohol, iodo -2 perfluoroalkyl-3 propanols (patents FR 2 486 521 and 2 486 522) and the dichloro-1,1 perfluoroalkyl-2 ethylenes (patent FR 2 559 479).
  • the activator concentration can range up to 10% by volume relative to the solvent mixture, but is preferably between 0.02 to 0.2%.
  • the preferred activator is allyl alcohol.
  • the anode is preferably identical to the cathode, but it can also be constituted by any usual material for an electrode, for example, nickel, platinum, gold, lead, etc.
  • the support electrolyte whose role is to ensure the passage of current can be chosen from all the mineral or organic salts known for this purpose (cf. for example "Organic Electrochemistry" by MM BAIZER, 1973, p. 227-230) and, more particularly, among the halides, perchlorates or arylsulfonates of alkali metals (preferably lithium) or of tetraalkylammonium (C 1 -C 4 alkyl radicals).
  • the concentration of support electrolyte can range from 0.01 to 1 mole per liter of solvent mixture.
  • the electrochemical reduction according to the invention can be carried out intensiostatically or potentiostatically in the various usual cell types. Although one can operate in a single compartment cell, it is preferred to conduct the operation in a two compartment cell to avoid free circulation between the cathode and the anode; the separator is generally made of an inert material, for example, porcelain, sintered glass, cellulose, alumina, porous polytetrafluoroethylene or ion exchange membrane.
  • the nature of the functional fluorinated derivatives obtained depends not only on the starting iodo-polyfluoroalkane, but also on the operating conditions used and in particular on the water content of the solvent.
  • perfluoro-carboxylic acid Cn- 1 F 2n-1 -COOH if the formamide contains less than 0.2% by volume of water.
  • a mixture of Cn-1F2n-1-COOH acid and CnF2n + 1-S0 2 H acid is obtained, the proportion of the latter rapidly increasing up to '' to about 95% when the water content reaches 20% by volume.
  • the acid CnF2n + 1-S0 2 H is formed almost exclusively, but the chemical yield then decreases rapidly.
  • a perfluorocarboxylic acid advantageously use a formamide having a water content as low as possible while, to obtain a perfluoro-sulfinic acid, it will advantageously operate in the presence of sulfur dioxide in a formamide with a water content greater than 5% by volume and preferably between 10 and 20%.
  • a separate glass electrochemical cell is used, using a sintered glass of porosity 3 or 4 and of diameter 30 mm, in two anode and cathode compartments with respective capacities 12 and 24 ml.
  • the two electrodes are made of carbon fibers and each consist of 5 cm of wick of 10,000 strands of 3 ⁇ m in diameter.
  • a mixture is introduced into the cell comprising 22.5 ml of dimethylformamide, 2.5 ml of water, 0.1 g of lithium chloride, 5 ⁇ l of allylic alcohol and 4 g of sulfur dioxide.
  • the reduction is carried out intensiostatically.
  • the catholyte is constantly agitated by means of a magnetic bar and a weak current of gaseous sulfur dioxide is maintained in the anode compartment throughout the duration of the electrolysis in order to avoid the diffusion of C 6 F 13 l.
  • the following table indicates the yields of perfluorohexanesulfinic and perfluorohexanoic acids obtained when the water content of the electrolysis medium is varied.
  • the perfluorobutanesulfinic acids C 4 F 9 S O2 H and perfluorobutanoic C 3 F 7 COOH are obtained with respective yields of 95 and 3%.
  • the perfluorooctanesulfinic acids C 8 F 17 SO 2 H and perfluorooctanoic C 7 F 15 COOH are obtained and the same renders ment.
  • a separate glass electrochemical cell is used, by means of a sintered glass of porosity 3 or 4 and of diameter 15 mm, in two anode and cathode compartments with respective capacities 3.5 and 7.5 ml.
  • the two electrodes are made of carbon fibers and each consist of 1.5 cm of wick of 10,000 strands of 3 ⁇ m in diameter.
  • a mixture is introduced into this cell comprising 6.3 ml of dimethylformamide, 0.7 ml of water, 0.03 g of lithium chloride , 1.5 ⁇ l of allylic alcohol and I g of sulfur dioxide.
  • the catholyte is agitated by means of a magnetic bar and a weak current of gaseous sulfur dioxide is maintained in the anode compartment throughout the duration of the electrolysis.
  • Example 2 The same cell and the same electrodes are used as in Example 1 and a mixture comprising 25 ml of dimethylformamide previously dehydrated on calcium hydride (water content ⁇ 0.2% by volume), 0 is introduced into the cell. 1 g of lithium chloride and 5 ⁇ l of allyl alcohol, at a rate of 11 ml in the anode compartment and 14 ml in the cathode compartment.
EP87400768A 1986-04-17 1987-04-07 Fonctionnalisation de iodo-polyfluoroalcanes par réduction électrochimique et nouveaux composés fluorés ainsi obtenus Expired EP0245133B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8605519 1986-04-17
FR8605519A FR2597511B1 (fr) 1986-04-17 1986-04-17 Fonctionnalisation de iodo-polyfluoroalcanes par reduction electrochimique et nouveaux composes fluores ainsi obtenus

Publications (2)

Publication Number Publication Date
EP0245133A1 EP0245133A1 (fr) 1987-11-11
EP0245133B1 true EP0245133B1 (fr) 1989-10-11

Family

ID=9334336

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87400768A Expired EP0245133B1 (fr) 1986-04-17 1987-04-07 Fonctionnalisation de iodo-polyfluoroalcanes par réduction électrochimique et nouveaux composés fluorés ainsi obtenus

Country Status (17)

Country Link
US (2) US4830715A (es)
EP (1) EP0245133B1 (es)
JP (1) JPS62250191A (es)
AT (1) AT394214B (es)
AU (1) AU587120B2 (es)
CA (1) CA1299191C (es)
DE (1) DE3760742D1 (es)
DK (1) DK195187A (es)
ES (1) ES2005153A6 (es)
FI (1) FI84918C (es)
FR (1) FR2597511B1 (es)
GR (1) GR870612B (es)
IL (1) IL82011A (es)
NO (1) NO169085C (es)
PT (1) PT84706B (es)
TR (1) TR22854A (es)
ZA (1) ZA872754B (es)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5202506A (en) * 1992-04-02 1993-04-13 E. I. Du Pont De Nemours And Company Oxidative drown process for 2-perfluoroalkylethyl alcohols
JPH061472U (ja) * 1992-06-15 1994-01-11 積水化学工業株式会社 洗面台
JP3324273B2 (ja) * 1994-05-16 2002-09-17 松下電器産業株式会社 多チャンネル多重装置
TWI335517B (en) * 2006-08-25 2011-01-01 Via Tech Inc Method of requests access and scheduling and related apparatus thereof
JP5556177B2 (ja) * 2007-09-04 2014-07-23 ダイキン工業株式会社 含フッ素化合物の吸着方法と回収方法

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2519983A (en) * 1948-11-29 1950-08-22 Minnesota Mining & Mfg Electrochemical process of making fluorine-containing carbon compounds
US2606206A (en) * 1951-02-05 1952-08-05 Minnesota Mining & Mfg Perfluorosebacic acid
US3283012A (en) * 1962-05-29 1966-11-01 Du Pont Process for preparing 2-perfluoroalkylethanol
US3810939A (en) * 1970-03-11 1974-05-14 Nat Starch Chem Corp Fluorocarbon sulfonic acid water and oil repellency agents
IT1117060B (it) * 1976-03-05 1986-02-10 Ugine Kuhlmann Procedimento per la preparazione di composti perfluorati,particolarmente di acidi perfluorocarbossilici e perfluoroalcan solfinici
FR2342950A1 (fr) * 1976-03-05 1977-09-30 Ugine Kuhlmann Procede de fonctionnalisation de radicaux perfluores
FR2374287A1 (fr) * 1976-12-17 1978-07-13 Ugine Kuhlmann Procede de preparation de derives des acides perfluoroalcane-carboxyliques et perfluoroalcane-sulfiniques
DE2903981A1 (de) * 1979-02-02 1980-08-07 Hoechst Ag Rueckgewinnung fluorierter emulgatorsaeuren aus basischen anionenaustauschern
FR2486521A1 (fr) * 1980-07-08 1982-01-15 Ugine Kuhlmann Procede d'addition d'iodoperfluoroalcanes sur des composes ethyleniques ou acetyleniques
US4332954A (en) * 1981-01-30 1982-06-01 Minnesota Mining And Manufacturing Company Cyclic sulfoperfluoroaliphaticcarboxylic acid anhydrides
JPS57164991A (en) * 1981-04-02 1982-10-09 Asahi Chem Ind Co Ltd Production of (omega-fluorosulfonyl)haloaliphatic carboxylic acid fluoride
DE3128118A1 (de) * 1981-07-16 1983-02-03 Hoechst Ag, 6000 Frankfurt "verfahren zur herstellung von (alpha),(omega)-bis-fluorsulfato-perfluoralkanen sowie einige spezielle dieser verbindungen"
FR2521987A1 (fr) * 1982-02-23 1983-08-26 Ugine Kuhlmann Procede de preparation d'alcools polyfluores du type rfch2ch2oh
FR2559479B1 (fr) * 1984-02-14 1986-07-18 Atochem Synthese d'acides perfluoroalcane-carboxyliques
US4647350A (en) * 1985-10-15 1987-03-03 Monsanto Company Electrolytic preparation of perfluoroalkanoic acids, perfluoroalkanols and perfluoroalkyl esters

Also Published As

Publication number Publication date
EP0245133A1 (fr) 1987-11-11
NO169085B (no) 1992-01-27
NO871494L (no) 1987-10-19
GR870612B (en) 1987-08-12
NO871494D0 (no) 1987-04-09
JPS62250191A (ja) 1987-10-31
PT84706A (fr) 1987-05-01
FI871680A0 (fi) 1987-04-15
NO169085C (no) 1992-05-06
PT84706B (pt) 1989-11-30
DE3760742D1 (en) 1989-11-16
AT394214B (de) 1992-02-25
FI84918C (fi) 1992-02-10
AU7174787A (en) 1987-10-22
ZA872754B (en) 1987-10-05
US5023370A (en) 1991-06-11
ES2005153A6 (es) 1989-03-01
AU587120B2 (en) 1989-08-03
DK195187A (da) 1987-10-18
ATA94987A (de) 1991-08-15
CA1299191C (fr) 1992-04-21
FI84918B (fi) 1991-10-31
IL82011A (en) 1990-11-29
FI871680A (fi) 1987-10-18
TR22854A (tr) 1988-09-13
JPH0254436B2 (es) 1990-11-21
US4830715A (en) 1989-05-16
DK195187D0 (da) 1987-04-15
FR2597511B1 (fr) 1990-09-07
FR2597511A1 (fr) 1987-10-23

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