Solvay Specialty Polymers Italy S.p.a.

Solvay Solexis, Inc.

Rhodia Operations

Syensqo Specialty Polymers Italy S.p.a.

Stefano Millefanti

Vito Tortelli

Giuseppe Marchionni

Pierangelo Calini

Vincenzo Arcella

Luca Merlo

Alessandro Ghielmi

Marco Avataneo

Emanuela Antenucci

Ivan Diego Wlassics

Marco Galimberti

Serena Carella

Alessio Marrani

Valeriy Kapelyushko

Stefano Bossolo

Michael J Cox

Manuel Gregori

Luca Cirillo

Joel Pollino

Fernand Gauthy

Maurizio Biso

Stefania Albonetti

Letanzio Bragante

Giuseppe Fornasari

Loïc Baussaron

Marco Colladon

Marco Piccinini

Stefano Mauri

Francesco Venturini

Debaki Ghosh

Rahul Shingte

Ritu Ahuja

Gajanan Manohar Pawar

Romain Debortoli

Vijay Kadam

Chinmay Nardele

The invention pertains to a multi-step process for making polyfunctional aromatic compounds comprising two phenyl rings bearing reactive groups susceptible of polycondensation reaction to provide polycondensed polymers, said method using economic raw materials, and possessing high selectivity and overall yield.

Method of making perfluorocyclobutane-containing monomer

The invention pertains to a composition based on a fluoroelastomer comprising nitrile or carboxylate-type cure sites and including a curing agent and a Br-containing marker having reactivity towards the said cure-sites, which can be cured so as to deliver cured parts maintaining chemically bound bromine atoms; this material, when submitted to wear/damage would hence release Br-containing contaminants, which can easily spotted via notably an on-line mass spectrometer, so as to monitor and anticipate critical failures of sealing materials based there upon.

Fluoroelastomer composition

The present invention relates to processes for the manufacture of 1,2,3,4-tetrachloro-hexafluoro-butane in a microreactor.

Processes for the synthesis of 1,2,3,4-tetrachloro-hexafluoro-butane

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&#x2014;CRf'X&#x2014;CRf&#x2033;Rf&#x2032;&#x2033;X&#x2033;&#x2003;&#x2003;(I-A)wherein Rf represents a C1-C6 perfluoro(oxy)alkyl group; Rf&#x2032;, Rf&#x2033; and Rf&#x2032;&#x2033;, equal or different from each other, independently represent fluorine atoms or C1-C5 perfluoro(oxy)alkyl groups; X and X&#x2032;, equal or different from each other, are independently chosen among Cl, Br or I; wherein Rf* and Rf*&#x2032;, 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&#x2032; 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 of group IB.

Method for manufacturing perfluorovinylethers

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.

Process for the dehydrochlorination of chlorinated hydrocarbons

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.

Process for the synthesis of trifluoroethylene

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.

Process for reducing unstable end-groups in fluorinated polymers

A process for the manufacture of a perfluorovinylether by hydrodehalogenation of a halofluoroether (HFE) having general formula (I-A) or (I-B): wherein Rrepresents a C-Cperfluoro(oxy)alkyl group; R', R&#x2033; and R&#x2032;&#x2033;, equal to or different from each other, independently represent fluorine atoms or C-Cperfluoro(oxy)alkyl groups; X and X&#x2032;, equal to or different from each other, are independently chosen among Cl, Br or I; R* and R*&#x2032;, equal to or different from each other, independently represent fluorine atoms or C-Cperfluoro(oxy)alkyl groups; Yand Y, equal to or different from each other, independently represent fluorine atoms or C-Cperfluoroalkyl 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&#xb0; C.

Process for preparing perfluoro-1,3-butadiene, comprising the following steps:

Process for the synthesis of perfluorobutadiene

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 &#x2014;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.

Semi-crystalline fluoropolymer having ion exchange groups

The invention pertains to a process for stabilizing a semi-crystalline fluoropolymer comprising ion exchange groups, said process comprising: Still objects of the invention are a stable semi-crystalline fluoropolymer as above defined having a low amount of unstable ends groups of &#x2014;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.

Process for stabilizing fluoropolymer having ion exchange groups

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; Ris a fluorinated substituent, preferably perfluorinated, selected from the following groups: C-Clinear or branched alkylic; C-Ccycloalkylic; aromatic, C-Carylalkyl; heterocyclic or C-C-alkylheterocyclic; preferably perfluoroalkyl; R&#x2032; is as defined in the application;by reaction of carbonyl compounds having formula: wherein:Rand n are as above; u=0, 1; R&#x2032; is as defined in the application;in liquid phase, with elemental fluorine and with olefinic compounds of formula:CAF&#x2550;CA&#x2032;F&#x2003;&#x2003;(III)wherein A and A&#x2032; are as above,at temperatures from &#x2212;120&#xb0; C. to &#x2212;20&#xb0; C., preferably from &#x2212;100&#xb0; C. to &#x2212;40&#xb0; C., optionally in the presence of an inert solvent under the reaction conditions.

Process for preparing fluorohalogenethers

A process for preparing (per)fluorohalogenethers having general formula: wherein:

A process for preparing (per)fluorohalogenethers containing the &#x2014;SOF group, having general formula (I):FSO&#x2014;R&#x2014;CFOCAF&#x2014;CA'F&#x2003;&#x2003;(I)wherein:

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Como, Italy

Stefano Millefanti