Solvay Solexis S.p.a.

Ausimont S.p.a.

Montedison S.p.a.

Ausimont S.r.l.

Solvay Specialty Polymers Italy S.p.a.

Pierangelo Calini

Vito Tortelli

Giorgio Guglielmo

Stefano Millefanti

Guglielmo Gregorio

Vincenzo Arcella

Marco Apostolo

Francesco Triulzi

Emanuela Antenucci

Alberto Zompatori

Paolo Roffia

Silvana Modena

Sergio Tonti

A process for preparing perfluorovinylethers having general formula:RO&#x2014;CF&#x2550;CF&#x2003;&#x2003;(IA)

Process for preparing fluorohalogenethers

A process for preparing fluorovinylethers having general formula:RO&#x2014;CF&#x2550;CF&#x2003;&#x2003;(IA)

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.

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:

Process for preparing (per) fluorohalogenethers

A process for preparing (per)fluorohalogenethers having general formula (II):R'CFOCFA-CA&#x2032;F&#x2003;&#x2003;(II)wherein:&#x2014;

Amorphous perfluorinated copolymers, comprising cyclic perfluorinated units deriving from at least two different perfluorinated comonomers, optionally with units deriving from a perfluorinated monomer containing at least one olefinic unsaturation (perfluoroolefin), or comprising cyclic perfluorinated units and units deriving from a perfluorinated monomer containing at least one olefinic unsaturation, said perfluorinated copolymers having the following combination of properties:

Amorphous perfluorinated copolymers

Amorphous perfluorinated or fluorinated polymers containing an amount lower than 0.05 mmoles/kg polymer of each of the following ionic end groups: COF, COOH, their esters or salts, when the used determination method for said end groups is the Fourier Transform IR spectroscopy by Nicolet&reg; Nexus FT-IR equipment (256 scannings, resolution 2 cm )

Amorphous (per) fluorinated polymers

A process for preparing the novel compound 2-bromo, 1', 2'-dichloroperfluoro diethyl ether of formula:

2-bromo,1',2'-dichloroperfluoro diethyl ether and process for preparing

A process for fluorinating hydrogenated ethereal compounds by direct reaction with elemental F.sub.2 diluted with an inert gas, wherein the starting compound is in the liquid phase, said fluorination being carried out in the presence of a per fluoropolyetheral compound and of an alkaline metal fluoride.

Process for preparing perfluoroethers by fluorination with elemental

The new compound bromofluoroethylhypofluorite, having the formula CF.sub.2 BrCF.sub.2 OF is obtained by starting from ##STR1## by the reaction in gaseous phase with fluorine, in the presence of a catalyst constituted by CsF on a support constituted by copper (or by another metal) in the form of a porous material having a surface area of at least 0.1 m.sup.2 /g.

Bromofluoroethylhypofluorite and process for its preparation

Process for the preparation of chloro-oxy-halo-compounds by means of the direct reaction between FCl and organic compounds having a molecular structure wherein an oxygen atom is directly linked to a carbon atom in the carbonyl form, in the presence of a catalyst constituted by an alkali metal or alkali-earth metal fluoride, preferably selected from K, Rb, Cs, Ba, Sr, the reaction being carried out in the gas phase and in continuous.

Process for the preparation of perhalohydrocarbon hypochlorites

A method of recovering the catalyst in active form from the acetic mother liquors from the synthesis of terephthalic acid. From said mother liquors, after removal of water, there is removed by evaporation an amount of from 70 to 90% of the CH.sub.3 COOH present therein. The concentrated liquor is cooled below 60.degree. C. and the solid which precipitates is collected and recycled for reuse in the systhesis. The liquid phase is extracted with water or with an aqueous acetic acid solution in the presence of particular coadjuvants such as isobutyl acetate, and the aqueous phase, which contains the recovered catalyst, is recycled to the original synthesis.

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Milan, Italy

Pierangelo Calini