Abstract: By reaction of a perfluoro vinyl ether with a perfluoro carbonic acid fluoride perfluorinated ketones of the formula R.sup.1 --O--CF(CF.sub.3)--CO--R.sup.2 with at least 13 carbon atoms may be obtained. These ketones may be used as inert solvents of high boiling point. The reaction is catalyzed by cesium fluoride and carried out in an aprotic polar solvent.

Abstract: Modified tetrafluoroethylene dispersion polymers are prepared by polymerizing tetrafluoroethylene in the presence of perfluorinated vinyl ethers of the formula I ##STR1## as modification agent. The articles made from the polymers by paste-extrusion have improved mechanical and electrical properties even if the extrusion is carried out at a high reduction ratio and draw-off rate.

Abstract: Process for preparing perfluorinated ethers by exposing perfluorocarbonyl compounds of the formula ##STR1## wherein R.sub.1 and R.sub.2 mean identical or different perfluoroalkyl radicals optionally containing one or several ether-like bound oxygen atoms to light rays having a wave length of from 100 to 600 m .mu., in a liquid phase, and the compounds thus prepared.

Abstract: Perfluoro carbonyl compounds react with hexafluoro propene epoxide in the presence of dimethylamino-difluoro-phosphorane producing perfluorinated carboxylic acid fluorides with ether linkages. Among the carbonyl compounds which can be used are perfluorinated ketones, acid fluorides of the formulaR.sub.F -- COF and R.sub.F -- OCF(CF.sub.3) -- COF(r.sub.f being a perfluoro-alkyl radical having from 1 to 4 carbon atoms) and perfluoro-2-oxo-3,6-dimethyl-1,4-dioxane.

Abstract: Reaction of hexafluoropropene epoxide with phosphoric acid tris-(dialkylamides) gives the new perfluoro-.alpha.-[3.6-dimethyl-1.4-dioxanyl-2-oxy]-propionic acid fluoride. By hydrolysis and decarboxylation of the acid in the presence of fluorine perfluoro-2-ethoxy-[3.6-dimethyl-1.4-dioxane] is obtained which can be used as chemically inert lubricant or heat transfer liquid.

Abstract: New and useful perfluorinated cyclohexyl ethers are manufactured by reacting a phenol with hexafluoro propene or tetrafluoro ethylene, dissolving the partly fluorinated phenyl alkyl ethers obtained in hydrofluoric acid and electrolyzing the solution.

Abstract: Perfluorinated vinyl ethers are prepared by reacting a fluorinated carboxylic acid fluoride with hexafluoropropylene epoxide in the presence of a catalyst and thereafter pyrolyzing the carboxylic acid fluoride containing ether linkages, optionally after having converted it into a salt of a monovalent metal. The compounds are used as monomers for copolymers or as intermediates in the preparation of saturated fluorinated ethers.

Abstract: By reacting tertiary amines carrying hydroxyethyl or 2-hydroxypropyl groups with hexafluoropropene in an aprotic solvent in the presence of a basic catalyst such as triethylamine the hexafluoropropyl ether of the starting compound containing the group ##STR1## with X = CH.sub.3 or H is obtained.

Abstract: Preparation of derivatives of benzene containing CF.sub.3 groups from the corresponding compounds containing CCl.sub.3 groups (e.g. trichloromethyl benzene) is carried out continuously with excellent yield rates by reaction with liquid hydrogen fluoride in an autoclave above 80.degree.C, (which latter exceeds the stoichiometric proportion by at least 25 mole %). The reactants are fed continuously into the autoclave. The reaction mixture preferably becomes pressurized to at least 20 atmospheres and homogeneous after having reached a certain filling level. The reaction mixture is thereafter withdrawn proportionally to its feeding-in rate. The mixture may be conveyed through one or several additional autoclaves with the final withdrawal of the reaction mixture being out from the terminal autoclave of this cascade. The fluorination products are well known starting and inermediate products for the preparation of dyestuffs and pesticidal compositions.

Abstract: Mono- or polyhydric alcohols of the alkan-, tetrahydrofuran- or tetrahydropyran series or di- or tri-alkyleneglycols are dissolved in an aprotic polar solvent and reacted with C.sub.3 F.sub.6 in the presence of trialkylamines, or with tetrafluoroethylene to give the corresponding tetrafluoroethyl- or hexafluoropropyl ethers. The solution of the fluoroethers in anhydrous hydrofluoric acid is electrolyzed. Hydrogen-free perfluoroethers are obtained.