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EP0043758A1 - Method of adding iodoperfluoroalkanes to ethylenic or acetylenic compounds - Google Patents

Method of adding iodoperfluoroalkanes to ethylenic or acetylenic compounds Download PDF

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Publication number
EP0043758A1
EP0043758A1 EP81401033A EP81401033A EP0043758A1 EP 0043758 A1 EP0043758 A1 EP 0043758A1 EP 81401033 A EP81401033 A EP 81401033A EP 81401033 A EP81401033 A EP 81401033A EP 0043758 A1 EP0043758 A1 EP 0043758A1
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Prior art keywords
ethylenic
cathode
iodoperfluoroalkanes
electrocatalysis
process according
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German (de)
French (fr)
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EP0043758B1 (en
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Auguste André Aime Commeyras
Patrick André Marie Calas
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Arkema France SA
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Atochem SA
Elf Atochem SA
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    • 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

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  • This addition can be carried out for example by radical route initiating the reaction by a rise in temperature (RN Haszeldine, J. Chem. Soc. 1953 p. 1199, USP 3 016 406 and 3 016 407), by irradiation with UV rays. (article by RN Haszeldine already cited, JD Park, J. Org. Chem. 26 1961 p. 2086 and D. Cantacuzene J. Chem. Soc. Perkin 1 1977 p. 1365), via azo derivatives (NO Brac , J. Orge Chem. 27 1962 p. 3027 and USP 3 083 224, 3 145 222 and 3 257 407).
  • the Applicant has developed a process for adding iodoperfluoroalkanes to unsaturated alcohols by electrocatalysis, which leads to practically quantitative yields.
  • allyl alcohol for example, the corresponding polyfluorinated iodoalcohol is first obtained, then by continuing the electrolysis, the epoxide is obtained by dehydroiodidation.
  • the iodide ions produced migrate to the anode where they are oxidized with the formation of iodine which settles in the anolyte in the form of elementary iodine.
  • phase of formation of the halohydrin and that of the epoxide are successive or simultaneous depending on the density of the current imposed.
  • the process of the invention is applicable to acetylenic alcohols. This is how propargyl alcohol gives a mixture of iodo ethylenic alcohol and acetylenic alcohol: Ethylenic alcohol is found in both cis and trans forms.
  • Ethylene ethers can also fix R F I under the operating conditions described.
  • the reaction can be carried out in a solvent medium or in an aqueous emulsion depending on the cathode material used.
  • a mercury cathode the reaction will take place in DMF medium
  • a carbon fiber cathode it is possible to use an aqueous emulsion containing iodoperfluoroalkane, unsaturated alcohol and an electrolyte like KCl.
  • a type of carbon fiber which can be used as a cathode mention may be made of RIGILOR AGTF 10,000 fibers, long fibers V 5 C and graphite felts R V G which are all products of Carbone-Lorraine.
  • the Faraday yield varies with the type of cell used. It is excellent for mercury cathode cells, significantly less good for carbon fiber cathode cells. Nevertheless, the phase of formation of the R F I addition compound on the olefin or the acetylene compound is still electrocatalytic with an electrical current consumption clearly less than 1 Faraday per mole, while the epoxidation phase is not electrocatalytic and requires at least 1 Faraday per mole of product formed.
  • the ohmic drop in the cell depends closely on the geometry of the assembly and on the aqueous phase / organic phase ratio of the catholyte. However, it remains low if we compare it with the values encountered in organic electrochemistry. It varies from around 4 to 10 volts depending on the intensities used.
  • the electrodes are a 6 cm diameter mercury cathode and a platinum cloth anode.
  • the electrolysis potential is controlled by a colomel reference electrode, saturated with KCl (ECS).
  • the anode is carbon (electrode for arc 6 mm in diameter).
  • the anolyte is a saturated solution of KC1, the catholyte contains:
  • FIG. 1 shows the plan of the apparatus used.
  • R F C 4 F 9 .
  • Example 2 is repeated, varying the intensity of the electrolysis current. The results are given in the table below: the% of (1) and (2) are given relative to the starting R F I Note that for Example 4, the electrical efficiency for the conversion of R F I in halohydrin is at time 60 mm 0.25 Faraday per mole of R F I from.
  • Example 2 The cell defined in Example 2 is used.
  • Example 2 The cell defined in Example 2 is used.
  • the catholyte contains 2 ml H 2 0 saturated with KC1 4 ml diallylether
  • the C 6 F 13 compound is obtained in an analogous manner. These compounds are soluble in acetone from which they recrystallize by slow evaporation of the solvent. Carbon 13 NMR analysis makes it possible to determine the cis-trans percentage of A. (cf. NO Brace J. Org. Chem. 44 1979 p. 212).
  • the organic phase tends to consist only of C 8 F 17 I with very little allylic alcohol, the latter preferably passing into the aqueous phase. The electrolysis then does not lead to any reaction on C 8 F 17 I.
  • compositions are indicated in% molar.
  • the two epoxides formed can be separated by distillation; they are colorless, dense liquids (d ⁇ 1.75).

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  • Organic Chemistry (AREA)
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Abstract

Procédé d'addition d'iodoperfluoroalcanes de formule CF3 (CF2)2nl où n varie de 1 à 19, sur des composés éthyléniques ou acétyléniques caractérisé par une électrocatalyse du mélange des réactifs.Process for adding iodoperfluoroalkanes of formula CF3 (CF2) 2nl where n varies from 1 to 19, on ethylenic or acetylenic compounds characterized by electrocatalysis of the mixture of reactants.

Description

L'addition d'iodures de perfluoroalcane CF3(CF2)nI que nous désignerons sous le terme générique de RFI à des composés éthyléniques ou acétyléniques peut conduire à des produits qui sont utilisés comme intermédiaires de synthèse.The addition of perfluoroalkane iodides CF 3 (CF 2 ) n I which we will designate under the generic term of R F I to ethylenic or acetylenic compounds can lead to products which are used as synthesis intermediates.

Plusieurs procédés sont connus, mais ceux-ci ne donnent que des rendements médiocres dans le cas des alcools éthyléniques ou acétyléniques et notamment dans le cas de l'alcool allylique.Several methods are known, but these only give mediocre yields in the case of ethylenic or acetylenic alcohols and in particular in the case of allyl alcohol.

Cette addition peut s'effectuer par exemple par voie radicalaire initiant la réaction par une élévation de température (R.N. Haszeldine, J. Chem. Soc. 1953 p. 1199, USP 3 016 406 et 3 016 407), par irradiation par les rayons UV (article de R.N. Haszeldine déjà cité, J.D. Park, J. Org. Chem. 26 1961 p. 2086 et D. Cantacuzene J. Chem. Soc. Perkin 1 1977 p. 1365), par l'intermédiaire des dérivés azoïques (N.O. Brac, J. Orge Chem. 27 1962 p. 3027 et USP 3 083 224, 3 145 222 et 3 257 407).This addition can be carried out for example by radical route initiating the reaction by a rise in temperature (RN Haszeldine, J. Chem. Soc. 1953 p. 1199, USP 3 016 406 and 3 016 407), by irradiation with UV rays. (article by RN Haszeldine already cited, JD Park, J. Org. Chem. 26 1961 p. 2086 and D. Cantacuzene J. Chem. Soc. Perkin 1 1977 p. 1365), via azo derivatives (NO Brac , J. Orge Chem. 27 1962 p. 3027 and USP 3 083 224, 3 145 222 and 3 257 407).

Il est également possible de catalyser l'addition par le système d'Assher (J. Chem. Soc. 1961 p. 2261), le catalyseur étant un mélange de sels cuivreux et cuivriques et d'amines. Ce procédé a été étendu à des molécules fluorées par D.J. Burton (Tetrahedron Letters 1966 p. 5163) N.O. Brace (J. Orge Chem. 44 1979 p. 212) et décrit dans le BF 2 103 459.It is also possible to catalyze the addition by the Assher system (J. Chem. Soc. 1961 p. 2261), the catalyst being a mixture of cuprous and cupric salts and amines. This process has been extended to fluorinated molecules by D.J. Burton (Tetrahedron Letters 1966 p. 5163) N.O. Brace (J. Orge Chem. 44 1979 p. 212) and described in BF 2 103 459.

Si tous ces systèmes permettent d'additionner RFI à un composé éthylénique, ils présentent l'inconvénient de n'aboutir qu'à des rendements médiocres et très variables suivant la nature de l'initiateur et celle de l'oléfine utilisée. Il n'existe pas de catalyseur universel et en particulier il n'existe pas de système capable de provoquer l'addition quantitative de RFI sur les alcools éthyléniques. C'est ainsi que l'addition photochimique suivant J.D. Park, ou le procédé décrit dans le BF 2 103 459 donnent un taux de transformation de seulement 50 - 55 % avec l'alcool allylique.If all these systems make it possible to add R F I to an ethylenic compound, they have the disadvantage of only resulting in mediocre yields and very variable depending on the nature of the initiator and that of the olefin used. There is no universal catalyst and in particular there is no system capable of causing the quantitative addition of R F I to ethylenic alcohols. Thus the photochemical addition according to JD Park, or the process described in BF 2 103 459 give a transformation rate of only 50-55% with allyl alcohol.

La demanderesse a mis au point un procédé d'addition des iodoperfluoroalcanes aux alcools non saturés par électrocatalyse, qui conduit à des rendements pratiquement quantitatifs. Avec l'alcool allylique par exemple, on obtient dans un premier temps l'iodoalcool polyfluoré correspondant, puis en poursuivant l'électrolyse on obtient l'époxyde par déshydroioduration.

Figure imgb0001
Figure imgb0002
 The Applicant has developed a process for adding iodoperfluoroalkanes to unsaturated alcohols by electrocatalysis, which leads to practically quantitative yields. With allyl alcohol, for example, the corresponding polyfluorinated iodoalcohol is first obtained, then by continuing the electrolysis, the epoxide is obtained by dehydroiodidation.
Figure imgb0001
Figure imgb0002

Les ions iodures produits migrent vers l'anode où ils sont oxydés avec formation d'iode qui décante dans l'anoly- te sous forme d'iode élémentaire.The iodide ions produced migrate to the anode where they are oxidized with the formation of iodine which settles in the anolyte in the form of elementary iodine.

La phase de formation de l'halohydrine et celle de l'époxyde sont successives ou simultanées selon la densité du courant imposée.The phase of formation of the halohydrin and that of the epoxide are successive or simultaneous depending on the density of the current imposed.

Le procédé de l'invention est applicable aux alcools acétyléniques. C'est ainsi que l'alcool propargylique donne un mélange de iodo alcool éthylénique et d'alcool acétylénique :

Figure imgb0003
L'alcool éthylénique se trouve sous les deux formes cis et trans.The process of the invention is applicable to acetylenic alcohols. This is how propargyl alcohol gives a mixture of iodo ethylenic alcohol and acetylenic alcohol:
Figure imgb0003
 Ethylenic alcohol is found in both cis and trans forms.

Les éthers éthyléniques peuvent également fixer RFI dans les conditions opératoires décrites. Le diallyl éther CH2 = CH - CH2 - O - CHZ - CH = CHZ par exemple donne par électrocatalyse le composé :

Figure imgb0004
Ethylene ethers can also fix R F I under the operating conditions described. The diallyl ether CH 2 = CH - CH 2 - O - CH Z - CH = CH Z for example gives the compound by electrocatalysis:
Figure imgb0004

Tous ces produits sont des intermédiaires et peuvent être utilisés pour la fabrication de tensio-actifs fluorés et pour l'obtention de dérivés hydro et oléophobes utiles en particulier pour le traitement des textiles, cuir, papier, etc.All these products are intermediates and can be used for the manufacture of fluorinated surfactants and for obtaining hydro and oleophobic derivatives useful in particular for the treatment of textiles, leather, paper, etc.

La réaction peut être mise en oeuvre en milieu solvant ou en émulsion aqueuse en fonction du matériau cathodique employé. C'est ainsi qu'avec une cathode en mercure la réaction aura lieu en milieu D M F, et qu'avec une cathode en fibre de carbone il est possible d'utiliser une émulsion aqueuse contenant l'iodoperfluoroalcane, l'alcool insaturé et un électrolyte tel le KCl. Comme type de fibres de carbone utilisables comme cathode, on peut citer les fibres RIGILOR AGTF 10.000, les fibres longues V 5 C et les feutres de graphite R V G qui sont tous des produits de Carbone-Lorraine.The reaction can be carried out in a solvent medium or in an aqueous emulsion depending on the cathode material used. Thus with a mercury cathode the reaction will take place in DMF medium, and with a carbon fiber cathode it is possible to use an aqueous emulsion containing iodoperfluoroalkane, unsaturated alcohol and an electrolyte like KCl. As a type of carbon fiber which can be used as a cathode, mention may be made of RIGILOR AGTF 10,000 fibers, long fibers V 5 C and graphite felts R V G which are all products of Carbone-Lorraine.

Bien que l'invention soit réalisable avec l'ensemble des matériaux cathodiques et l'emploi de solutions ou d'émulsions, le procédé, lorsqu'il est mis en oeuvre dans ces dernières conditions, avec une cathode en fibre de carbone et une émulsion aqueuse contenant les réactifs présente le maximum d'avantages :

  • - absence de sous-produit, de catalyseur ou de solvant qui constituent autant de risques de pollution,
  • - séparation facile du composé obtenu,
  • - possibilité de travailler sur des solutions très concentrées ce qui économise l'énergie nécessaire à la séparation des produits et augmente la productivité des installations,
  • - conductivité électrique très élevée du milieu permettant l'utilisation de bas voltage et de fort ampérage,
  • - récupération directe de l'iode sous forme élémentaire dans le cas de la préparation d'époxyde,
  • - facilité pour résoudre le problème du diaphragme séparant les deux compartiments avec un matériau non mouillable par la phase organique.
Although the invention is feasible with all cathode materials and the use of solutions or emulsions, the process, when implemented under these latter conditions, with a carbon fiber cathode and an emulsion aqueous containing the reagents has the maximum advantages:
  • - absence of by-product, catalyst or solvent which constitute as many pollution risks,
  • - easy separation of the compound obtained,
  • - possibility of working on highly concentrated solutions which saves the energy required for product separation and increases the productivity of the installations,
  • - very high electrical conductivity of the medium allowing the use of low voltage and high amperage,
  • - direct recovery of iodine in elementary form in the case of the preparation of epoxide,
  • - facility to solve the problem of the diaphragm separating the two compartments with a material not wettable by the organic phase.

Le rendement Faraday varie avec le type de cellule utilisé. Il est excellent pour les cellules à cathode de mercure, nettement moins bon pour les cellules à cathode en fibre de carbone. Néanmoins la phase de formation du composé d'addition du RFI sur l'oléfine ou le composé acétylénique est toujours électrocatalytique avec une consommation de courant électrique nettement inférieure à 1 Faraday par mole, alors que la phase d'époxydation n'est pas électrocatalytique et nécessite au moins 1 Faraday par mole de produit formé.The Faraday yield varies with the type of cell used. It is excellent for mercury cathode cells, significantly less good for carbon fiber cathode cells. Nevertheless, the phase of formation of the R F I addition compound on the olefin or the acetylene compound is still electrocatalytic with an electrical current consumption clearly less than 1 Faraday per mole, while the epoxidation phase is not electrocatalytic and requires at least 1 Faraday per mole of product formed.

La chute ohmique dans la cellule dépend étroitement de la géométrie du montage et du rapport phase aqueuse/phase organique du catholyte. Cependant, elle reste faible si on la compare aux valeurs rencontrées en électrochimie organique. Elle varie d'environ 4 à 10 volts selon les intensités utilisées.The ohmic drop in the cell depends closely on the geometry of the assembly and on the aqueous phase / organic phase ratio of the catholyte. However, it remains low if we compare it with the values encountered in organic electrochemistry. It varies from around 4 to 10 volts depending on the intensities used.

Les exemples suivants illustrent l'invention sans toutefois la limiter.The following examples illustrate the invention without, however, limiting it.

EXEMPLE 1EXAMPLE 1

On utilise une cellule du type Moinet décrite dans le Bull Soc. Chim. Fr. 1969 p. 690. Les électrodes sont une cathode de mercure de 6 cm de diamètre et une anode en toile de platine. Le potentiel d'électrolyse est contrôlé par une électrode de référence au colomel, saturée en KCl (ECS).

Figure imgb0005
Figure imgb0006
 We use a Moinet type cell described in the Bull Soc. Chim. Fr. 1969 p. 690. The electrodes are a 6 cm diameter mercury cathode and a platinum cloth anode. The electrolysis potential is controlled by a colomel reference electrode, saturated with KCl (ECS).
Figure imgb0005
Figure imgb0006

La réduction monoélectronique de l'iodoalcane perfluoré nécessiterait 1 258 coulombs. Après le passage de seulement 60 coulombs on observe la conversion complète du C6F13I en l'halohydrine C6F13-CH2-CHI-CH2OH. Rendement électrique : 21,6 moles de RFI converties par Faraday consommé.Monoelectronic reduction of perfluorinated iodoalkane would require 1,258 coulombs. After the passage of only 60 coulombs, the complete conversion of C 6 F 13 I into the halohydrin C 6 F 13 -CH 2 -CHI-CH 2 OH is observed. Electrical efficiency: 21.6 moles of R F I converted by consumed Faraday.

EXEMPLE 2EXAMPLE 2

On utilise une cathode en fibre de carbone, RIGILOR AGTF 10.000 de Carbone-Lorraine, obtenue par pyrolyse de fibre de crylor. L'anode est un carbone (électrode pour arc de 6 mm de diamètre). L'anolyte est une solution saturée en KC1, le catholyte contient :

Figure imgb0007
Using a carbon fiber cathode, RIGILOR AGTF 10,000 from Carbone-Lorraine, obtained by pyrolysis of crylor fiber. The anode is carbon (electrode for arc 6 mm in diameter). The anolyte is a saturated solution of KC1, the catholyte contains:
Figure imgb0007

Le catholyte est agité au moyen d'un agitateur magnétique. La figure 1 montre le plan de l'appareillage utilisé.The catholyte is agitated by means of a magnetic stirrer. Figure 1 shows the plan of the apparatus used.

Avec un courant de 0,2 A on obtient en 1 h untaux de transformation de 90 % en C4F9CH2CHICH2OH.With a current of 0.2 A, one obtains in 1 hour a conversion rate of 90% into C 4 F 9 CH 2 CHICH 2 OH.

Si l'électrolyse est poursuivie on observe la conversion progressive de l'halohydrine en époxyde C4F9CH2 -

Figure imgb0008
If the electrolysis is continued, the progressive conversion of the halohydrin to the epoxide is observed C 4 F 9 CH 2 -
Figure imgb0008

EXEMPLES 3 à 6EXAMPLES 3 to 6

Dans ces exemples RF= C4F9.In these examples R F = C 4 F 9 .

On répète l'exemple 2 en faisant varier l'intensité du courant d'électrolyse. Les résultats sont donnés dans le tableau ci-dessous :

Figure imgb0009
les % de (1) et (2) sont donnés par rapport au RFI de départ
Figure imgb0010
Figure imgb0011
Notons que pour l'exemple 4, le rendement électrique pour la conversion du RFI en halohydrine, est au temps 60 mm de 0,25 Faraday par mole de RFI de départ.Example 2 is repeated, varying the intensity of the electrolysis current. The results are given in the table below:
Figure imgb0009
 the% of (1) and (2) are given relative to the starting R F I
Figure imgb0010
Figure imgb0011
 Note that for Example 4, the electrical efficiency for the conversion of R F I in halohydrin is at time 60 mm 0.25 Faraday per mole of R F I from.

EXEMPLE 7EXAMPLE 7

On utilise la cellule définie dans l'exemple 2.The cell defined in Example 2 is used.

Le catholyte est chargé de 2 ml H2O saturée en KC1, 4 ml d'alcool propargylique CH = C - CH20H, 6 ml de C4 F 9I. On impose un courant de 0,2 A.

Figure imgb0012
The catholyte is charged with 2 ml H 2 O saturated with KC1, 4 ml of propargyl alcohol CH = C - CH 2 0H, 6 ml of C 4 F 9 I. A current of 0.2 A is imposed.
Figure imgb0012

Les % de A, B, C sont donnés en % molaire par rapport au RFI de départ :

Figure imgb0013
Figure imgb0014
 The% of A, B, C are given in molar% relative to the starting R F I:
Figure imgb0013
Figure imgb0014

Après formation des composés d'addition A et B on observe la déshydroioduration de A conduisant à C. Cette élimination de HI est provoquée par l'élévation du pH du catholyte (réduction de la phase auqueuse) et ne se produit que sur le composé A dans lequel I et H sont en position trans.After formation of the addition compounds A and B, the dehydroiodidation of A leading to C. is observed. This elimination of HI is caused by the elevation of the pH of the catholyte (reduction of the auqueuse phase) and occurs only on compound A in which I and H are in the trans position.

EXEMPLE 8EXAMPLE 8

On utilise la cellule définie dans l'exemple 2.The cell defined in Example 2 is used.

Le catholyte contient 2 ml H20 saturée en KC1 4 ml diallyléther

Figure imgb0015
Figure imgb0016
Figure imgb0017
Figure imgb0018
 The catholyte contains 2 ml H 2 0 saturated with KC1 4 ml diallylether
Figure imgb0015
Figure imgb0016
Figure imgb0017
Figure imgb0018

Le composé en C6F13 est obtenu de façon analogue. Ces composés sont solubles dans l'acétone d'où ils recristallisent par évaporation lente du solvant. L'analyse en R.M. N. du carbone 13 permet de déterminer le pourcentage cis-trans de A. (cf. N.O. Brace J. Org. Chem. 44 1979 p. 212).The C 6 F 13 compound is obtained in an analogous manner. These compounds are soluble in acetone from which they recrystallize by slow evaporation of the solvent. Carbon 13 NMR analysis makes it possible to determine the cis-trans percentage of A. (cf. NO Brace J. Org. Chem. 44 1979 p. 212).

EXEMPLE 9EXAMPLE 9

L'exemple 2 est répété en utilisant les chaînes C6F13I et C8F17I au lieu de C4F9I. Deux situations sont à considérer :

  • ― cas du C6F13I
Example 2 is repeated using the chains C 6 F 13 I and C 8 F 17 I instead of C 4 F 9 I. Two situations are to be considered:
  • - case of C 6 F 13 I

L'électrolyse donne des résultats quasi identiques à ceux obtenus pour le C4F9I.The electrolysis gives results which are almost identical to those obtained for C 4 F 9 I.

- cas du C8F17I- case of C 8 F 17 I

Pour co composé la phase organique a tendance à n'être constituée que de C8F17I avec très peu d'alcool allylique, ce dernier passant dans la phase aqueuse préférentiellement. L'électrolyse ne conduit alors à aucune réaction sur le C8F17I.For co-compound the organic phase tends to consist only of C 8 F 17 I with very little allylic alcohol, the latter preferably passing into the aqueous phase. The electrolysis then does not lead to any reaction on C 8 F 17 I.

Cette difficulté est résolue si on électrolyse une phase mixte C4F9I + C8F17I, dans une proportion de 20 % de C4 en volume. On observe alors la formation des produits attendus. Avec un courant de 0,2 A on a obtenu les résultats suivants :

Figure imgb0019
This difficulty is resolved if a mixed phase C 4 F 9 I + C 8 F 17 I is electrolyzed, in a proportion of 20% of C 4 by volume. We then observe the formation of the expected products. With a current of 0.2 A the following results were obtained:
Figure imgb0019

Les compositions sont indiquées en % molaire.The compositions are indicated in% molar.

Les deux époxydes formés sont séparables par distillation ; ce sont des liquides incolores, denses (d ≃ 1,75).The two epoxides formed can be separated by distillation; they are colorless, dense liquids (d ≃ 1.75).

Claims (8)

1 - Procédé d'addition d'iodoperfluoroalcanes de formule CF3 (CF2)n I où n varie de 1 à 19, sur des composés éthylé- niques ou acétyléniques caractérisé par une électrocatalyse du mélange des réactifs.1 - Process for adding iodoperfluoroalkanes of formula CF 3 (CF 2 ) n I where n varies from 1 to 19, on ethylenic or acetylenic compounds characterized by electrocatalysis of the mixture of reactants. 2 - Procédé selon la revendication 1 où le mélange des réactifs est en milieu solvant organique.2 - Process according to claim 1 wherein the mixture of reagents is in an organic solvent medium. 3 - Procédé selon la revendication 1 où le mélange des réactifs forme une émulsion aqueuse.3 - Process according to claim 1 wherein the mixture of reactants forms an aqueous emulsion. 4 - Procédé selon la revendication 1 où la cathode de la cellule d'électrolyse est une cathode en fibre de carbone.4 - Method according to claim 1 wherein the cathode of the electrolysis cell is a carbon fiber cathode. 5 - Procédé selon la revendication 1 où-la cathode de la cellule est une cathode de mercure.5 - Process according to claim 1 where-the cathode of the cell is a mercury cathode. 6 - Procédé selon l'une des revendications 1 à 5 dans lequel le composé éthylénique est l'alcool allylique et le produit formé par électrocatalyse l'halohydrine polyfluorée RFCH2-CHI-CH2OH.6 - Method according to one of claims 1 to 5 wherein the ethylenic compound is allyl alcohol and the product formed by electrocatalysis polyfluorinated halohydrin R F CH 2 -CHI-CH 2 OH. 7 - Procédé selon la revendication 6 dans lequel l'électrocatalyse est suivie d'une électrolyse conduisant à l'époxyde7 - Process according to claim 6 wherein the electrocatalysis is followed by an electrolysis leading to the epoxide
Figure imgb0020
Figure imgb0020
EP81401033A 1980-07-08 1981-06-26 Method of adding iodoperfluoroalkanes to ethylenic or acetylenic compounds Expired EP0043758B1 (en)

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FR8015121 1980-07-08
FR8015121A FR2486521A1 (en) 1980-07-08 1980-07-08 PROCESS FOR THE ADDITION OF IODOPERFLUOROALKANES TO ETHYLENIC OR ACETYLENIC COMPOUNDS

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EP0043758B1 EP0043758B1 (en) 1985-04-03

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US4650913A (en) * 1984-11-29 1987-03-17 E. I. Du Pont De Nemours And Company Sulfinate-initiated addition of perfluorinated iodides to olefins
WO2000003066A1 (en) * 1998-07-09 2000-01-20 Ppg Industries Ohio, Inc. Method of electrochemically producing epoxides

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FR2597511B1 (en) * 1986-04-17 1990-09-07 Atochem FUNCTIONALIZATION OF IODO-POLYFLUOROALCANES BY ELECTROCHEMICAL REDUCTION AND NOVEL FLUORINATED COMPOUNDS THUS OBTAINED
IT1190116B (en) * 1986-05-30 1988-02-10 Ausimont Spa PROCESS FOR THE SYNTHESIS OF MONO OR HYDROXYFLUOROALKANE

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US3379627A (en) * 1962-09-20 1968-04-23 Pullman Inc Process for the manufacture of oxygencontaining derivatives of olefins in an electrochemical cell
FR2103459A1 (en) * 1970-08-24 1972-04-14 Ciba Geigy Ag

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FR1443994A (en) * 1965-04-27 1966-07-01 Pechiney Saint Gobain Improvements in obtaining olefin oxides
US3632489A (en) * 1969-04-24 1972-01-04 Norman Louis Weinberg Electrochemical introduction of nitrogen and oxygen functions into olefinic compounds
US4097344A (en) * 1976-06-29 1978-06-27 E. I. Du Pont De Nemours And Company Electrochemical coupling of perfluoroalkyl iodides

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FR2103459A1 (en) * 1970-08-24 1972-04-14 Ciba Geigy Ag

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4650913A (en) * 1984-11-29 1987-03-17 E. I. Du Pont De Nemours And Company Sulfinate-initiated addition of perfluorinated iodides to olefins
WO2000003066A1 (en) * 1998-07-09 2000-01-20 Ppg Industries Ohio, Inc. Method of electrochemically producing epoxides

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FR2486521B1 (en) 1982-10-01
JPS6132398B2 (en) 1986-07-26
EP0043758B1 (en) 1985-04-03
DE3169663D1 (en) 1985-05-09
CA1148499A (en) 1983-06-21
JPS5747882A (en) 1982-03-18
BR8104338A (en) 1982-03-23
US4394225A (en) 1983-07-19
FR2486521A1 (en) 1982-01-15

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