Abstract: A catalytic process for the synthesis of trifluoroethylene from chlorotrifluoroethylene which comprises contacting chlorotrifluoroethylene with hydrogen in the presence of a catalyst consisting of palladium or platinum supported on extruded activated carbon.

Abstract: A catalytic process for the synthesis of trifluoroethylene from chlorotrifluoroethylene which comprises contacting chlorotrifluoroethylene with hydrogen in the presence of a catalyst consisting of palladium or platinum supported on extruded activated carbon.

Abstract: A process for the dehydrochlorination of a chlorinated hydrocarbon comprising at least one chlorine atom and at least one hydrogen atom on vicinal carbon atoms to yield the corresponding unsaturated hydrocarbon, said process comprising contacting the chlorinated hydrocarbon with a guanidinium salt or its guanidine precursor.

Abstract: A process for reducing the number of unstable end-groups in a fluorinated polymer is disclosed, said process comprising reacting a fluorinated polymer comprising unstable end-groups with fluorine in the presence of at least one (per)haloolefin comprising at least one carbon-carbon double bond and having at least one fluorine or chlorine atom on either one of the carbon atoms of said double bond. The fluorinated polymer may be selected from those polymers comprising recurring units derived from at least one ethylenically unsaturated fluorinated monomer or from fluorinated polyethers.

Abstract: A process for reducing the number of unstable end-groups in a fluorinated polymer is disclosed, said process comprising reacting a fluorinated polymer comprising unstable end-groups with fluorine in the presence of at least one (per)haloolefin comprising at least one carbon-carbon double bond and having at least one fluorine or chlorine atom on either one of the carbon atoms of said double bond. The fluorinated polymer may be selected from those polymers comprising recurring units derived from at least one ethylenically unsaturated fluorinated monomer or from fluorinated polyethers.

Abstract: A catalytic process for the synthesis of trifluoroethylene from chlorotrifluoroethylene which comprises contacting chlorotrifluoroethylene with hydrogen in the presence of a catalyst consisting of palladium or platinum supported on extruded activated carbon.

Abstract: A process for the manufacture of a perfluorovinylether by hydrodehalogenation of a halofluoroether (HFE) having general formula (I-A) or (I-B): wherein Rf represents a C1-C6 perfluoro(oxy)alkyl group; Rf?, Rf? and Rf??, equal to or different from each other, independently represent fluorine atoms or C1-C5 perfluoro(oxy)alkyl groups; X and X?, equal to or different from each other, are independently chosen among Cl, Br or I; Rf* and Rf*?, equal to or different from each other, independently represent fluorine atoms or C1-C3 perfluoro(oxy)alkyl groups; Y1 and Y2, equal to or different from each other, independently represent fluorine atoms or C1-C3 perfluoroalkyl groups. The process comprises contacting the halofluoroether (HFE) with hydrogen in the presence of a catalyst comprising at least one transition metal of group VIII B at a temperature of at most 340° C.

Abstract: The invention pertains to a process for the manufacture of a perfluorovinylether by hydrodehalogenation of a halofluoroether (HFE) having general formula (I-A) or (I-B): RfO—CRf?X—CRf?Rf??X???(I-A) wherein Rf represents a C1-C6 perfluoro(oxy)alkyl group; Rf?, Rf? and Rf??, equal or different from each other, independently represent fluorine atoms or C1-C5 perfluoro(oxy)alkyl groups; X and X?, equal or different from each other, are independently chosen among Cl, Br or I; wherein Rf* and Rf*?, equal or different from each other, independently represent fluorine atoms or C1-C3 perfluoro(oxy)alkyl groups; Y1 and Y2, equal or different from each other, independently represent fluorine atoms or C1-C3 perfluoroalkyl groups; X and X? are as above defined; said process comprising contacting said halofluoroether (HFE) with hydrogen in the presence of a catalyst comprising palladium and at least one transition metal (M) selected from the group consisting of the metals of group VIIIB, other than palladium, and o

Abstract: Process for preparing perfluoro-1,3-butadiene, comprising the following steps: A) preparation of fluoro-halo-butanes of formula: CF2YI—CFYII—CFYII—CF2YI??(V) in which YI and YII, which may be identical or different, may be H, Cl or Br, with the condition that YI and YII are not simultaneously hydrogen; starting with a chloroolefin having the formula: CY?Y?CY?Cl??(II) in which Y, Y?, Y?, which may be identical or different, are H, Cl or Br, with the condition that Y, Y?, Y? are not simultaneously hydrogen; and performing the following steps: a fluorodimerization, and a fluorination with elemental fluorine, the order of the two steps also possibly being inverted, a dehalogenation or dehydrohalogenation step being performed between the two steps, B) dehalogenation or dehydrohalogenation of the fluoro-halo compounds of formula (V) to give the compound perfluoro-1,3-butadiene.

Abstract: A catalytic process for the synthesis of trifluoroethylene from chlorotrifluoroethylene which comprises contacting chlorotrifluoroethylene with hydrogen in the presence of a catalyst consisting of palladium or platinum supported on extruded activated carbon.

Abstract: The invention pertains to a semi-crystalline fluoropolymer having ion exchange groups comprising recurring units derived from at least one ethylenicalty unsaturated monomer comprising at least one fluorine atom (fluorinated monomer); and a substantial amount of recurring units derived from at least one ethylenically unsaturated monomer comprising at least one ion exchange group (functional monomer), wherein the amount of unstable end groups of —COF type is of less than 0.05 mmol/kg, and the use of the stabilized fluoropolymer in fuel cells devices, a membrane and a membrane-electrode assembly.

Abstract: The invention pertains to a process for stabilizing a semi-crystalline fluoropolymer comprising ion exchange groups, said process comprising: suspending at least one semi-crystalline fluoropolymer having ion exchange groups [polymer (I)] in at least one fluorinated organic dispersing medium [medium (M)] so as to obtain a dispersion (D) of polymer (I) in a dispersing medium (M); contacting said dispersion (D) with fluorine under irradiation with U. V. radiation so as to obtain a stabilized polymer. Still objects of the invention are a stable semi-crystalline fluoropolymer as above defined having a low amount of unstable ends groups of —COF type, the use of the stabilized fluoropolymer obtained by the process or of the stable fluoropolymer in fuel cells devices, a membrane and a membrane-electrode assembly comprising said fluoropolymers.

Abstract: The invention pertains to a process for stabilizing a semi-crystalline fluoropolymer comprising ion exchange groups, said process comprising: suspending at least one semi-crystalline fluoropolymer having ion exchange groups [polymer (I)] in at least one fluorinated organic dispersing medium [medium (M)] so as to obtain a dispersion (D) of polymer (I) in a dispersing medium (M); contacting said dispersion (D) with fluorine under irradiation with U.V. radiation so as to obtain a stabilized polymer. Still objects of the invention are a stable semi-crystalline fluoropolymer as above defined having a low amount of unstable ends groups of —COF type, the use of the stabilized fluoropolymer obtained by the process or of the stable fluoropolymer in fuel cells devices, a membrane and a membrane-electrode assembly comprising said fluoropolymers.

Abstract: A process for the manufacture of a perfluorovinylether by hydrodehalogenation of a halofluoroether (HFE) having general formula (I-A) or (I-B): wherein Rf represents a C1-C6 perfluoro(oxy)alkyl group; Rf?, Rf? and Rf??, equal to or different from each other, independently represent fluorine atoms or C1-C5 perfluoro(oxy)alkyl groups; X and X?, equal to or different from each other, are independently chosen among Cl, Br or I; Rf* and Rf*?, equal to or different from each other, independently represent fluorine atoms or C1-C3 perfluoro(oxy)alkyl groups; Y1 and Y2, equal to or different from each other, independently represent fluorine atoms or C1-C3 perfluoroalkyl groups. The process comprises contacting the halofluoroether (HFE) with hydrogen in the presence of a catalyst comprising at least one transition metal of group VIII B at a temperature of at most 340° C.

Abstract: Process for preparing perfluoro-1,3-butadiene, comprising the following steps: A) preparation of fluoro-halo-butanes of formula: CF2 YI—CFYII—CFYII—CF2 YI??(V) in which YI and YII, which may be identical or different, may be H, Cl or Br, with the condition that YI and YII are not simultaneously hydrogen; starting with a chloroolefin having the formula: CY?Y?CY?Cl??(II) in which Y, Y?, Y?, which may be identical or different, are H, Cl or Br, with the condition that Y, Y?, Y? are not simultaneously hydrogen; and performing the following steps: a fluorodimerization, and a fluorination with elemental fluorine, the order of the two steps also possibly being inverted, a dehalogenation or dehydrohalogenation step being performed between the two steps, B) dehalogenation or dehydrohalogenation of the fluoro-halo compounds of formula (V) to give the compound perfluoro-1,3-butadiene.

Abstract: The invention pertains to a process for stabilizing a semi-crystalline fluoropolymer comprising ion exchange groups, said process comprising: suspending at least one semi-crystalline fluoropolymer having ion exchange groups [polymer (I)] in at least one fluorinated organic dispersing medium [medium (M)] so as to obtain a dispersion (D) of polymer (I) in a dispersing medium (M), contacting said dispersion (D) with fluorine under irradiation with U.V. radiation so as to obtain a stabilized polymer. Still objects of the invention arc a stable semi-crystalline fluoropolymer as above defined having a low amount of unstable ends groups of —COF type, the use of the stabilized fluoropolymer obtained by the process or of the stable fluoropolymer in fuel cells devices, a membrane and a membrane-electrode assembly comprising said fluoropolymers.

Abstract: A process for preparing (per)fluorohalogenethers having general formula: wherein: A and A?, equal to our different from each other, are selected among Cl, Br, H; m=1, 2; n=0, 1; R1 is a fluorinated substituent, preferably perfluorinated, selected from the following groups: C1-C20 linear or branched alkylic; C3-C7 cycloalkylic; aromatic, C6-C10 arylalkyl; heterocyclic or C5-C10-alkylheterocyclic; preferably perfluoroalkyl; R? is as defined in the application; by reaction of carbonyl compounds having formula: wherein: R1 and n are as above; u=0, 1; R? is as defined in the application; in liquid phase, with elemental fluorine and with olefinic compounds of formula: CAF?CA?F2??(III) wherein A and A? are as above, at temperatures from ?120° C. to ?20° C., preferably from ?100° C. to ?40° C., optionally in the presence of an inert solvent under the reaction conditions.

Abstract: A process for preparing (per)fluorohalogenethers having general formula: wherein: A and A?, equal to or different from each other, are selected among Cl, Br and H; m=1, 2; n=0, 1; R? is a C1 to C3 (per)fluoroalkyl substituent; R is a (per)fluoropolyether substituent; z and z? are 1 or zero, X1=F, CF3; by reaction of carbonyl compounds having formula: (R?)n—C(O)(F)q(CFX1(CF2)z(CH2)z?OR1)??(II) wherein: R? and n are as above; q=0, 1; X1=F or CF3; z=0 or 1; R1 is a (per)fluoropolyether substituent; in liquid phase, with elemental fluorine and with olefinic compounds of formula: CAF=CA?F2 ??(III) wherein A and A? are as above, at temperatures from ?120° C. to ?20° C., preferably from ?100° C. to ?40° C.

Abstract: A process for preparing (per)fluorohalogenethers having general formula: wherein: A and A?, equal to our different from each other, are selected among Cl, Br, H; m=1, 2; n=0, 1; R1 is a fluorinated substituent, preferably perfluorinated, selected from the following groups: C1-C20 linear or branched alkylic; C3-C7 cycloalkylic; aromatic, C6-C10 arylalkyl; heterocyclic or C5-C10-alkylheterocyclic; preferably perfluoroalkyl; R? is as defined in the application; by reaction of carbonyl compounds having formula: wherein: R1 and n are as above; u=0, 1; R? is as defined in the application; in liquid phase, with elemental fluorine and with olefinic compounds of formula: CAF?CA?F2??(III) wherein A and A? are as above, at temperatures from ?120° C. to ?20° C., preferably from ?100° C. to ?40° C., optionally in the presence of an inert solvent under the reaction conditions.

Abstract: A process for preparing (per)fluorohalogenethers containing the —SO2F group, having general formula (I): FSO2—R—CF2OCAF—CA?F2??(I) wherein: A and A?, equal to or different from each other, are Cl or Br; R has the following meanings: a (per)fluorinated, preferably perfluorinated, substituent, optionally containing one or more oxygen atoms; by reaction of carbonyl compounds having formula (II): FSO2—R—COF??(II) wherein R is as above; in liquid phase with elemental fluorine and with olefinic compounds having formula (III): CAF?CA?F??(III) wherein A and A? are as above, operating at temperatures from ?120° C. to ?20° C., optionally in the presence of a solvent inert under the reaction conditions.