Abstract: Halogenated aliphatic carboxylic acid fluorides are prepared by reacting halogenated aliphatic carboxylic acids with trihalogenomethyl aromatic compounds containing, as a predominant total or exclusively, fluorine atoms in the trihalogenomethyl groups, in particular with benzotrifluoride, in the presence of Lewis acids as catalysts. The reaction products are intermediate products having a multiplicity of uses.

Abstract: Biocatalysts in bead form which contain microorganisms are particularly advantageously obtained by radical polymerization of acrylamide with methylene-bis-acrylamide in aqueous-organic phase suspension when the organic phase is a highly fluorinated carbon compound. The biocatalysts thus obtained have high stability and activity and are suitable for biotechnical processes.

Abstract: Perfluorocarbonyl compounds of the formulae IV and V ##STR1## in which R.sub.f denotes perfluoroalkyl, R'.sub.f denotes perfluoroalkylene, R denotes F, Cl, perfluoroalkyl or --OR"' (R"'=alkyl, aryl or aralkyl) and n denotes a number from 0 to 10, are prepared, starting from compounds of the formula I ##STR2## in which R.sub.f, R'.sub.f and n have the same meaning as in the formulae IV and V and R" is F, Cl or perfluoroalkyl, by electrolysis in an electrolyte consisting of fluorosulfonic acid/alkali metal fluorosulfonate and, if necessary, esterification with R"'OH, and decomposition ##STR3## in the presence of catalytic amounts of alkali metal fluorides and/or aprotic N-bases. Most of the compounds IV and V are new; the latter are, above all, valuable heat transfer fluids, lubricating oils or intermediates for the preparation of other F-organic compounds.

Abstract: According to the specified process chromium oxyfluoride catalysts which have largely lost their activity are regenerated. The catalysts are mixed with magnesium oxide or magnesium hydroxide in the presence of water and converted into a paste. If necessary the mixture must be concentrated by evaporation until it exhibits the consistency of a paste. Finally the paste is dried. The paste is best converted into molded bodies such as, for example, granules before drying.

Abstract: A process is specified for preparing a chromium- and magnesium-containing catalyst for fluorination reactions by precipitating chromium(III) hydroxide. In this process, 1 mole of a water-soluble chromium(III) salt is reacted with at least 1.5 moles of magnesium hydroxide or magnesium oxide in the presence of water, and the reaction mixture--if necessary by evaporation--is converted into a paste which contains chromium(III) hydroxide and a magnesium salt. The paste is dried and treated with hydrogen fluoride at temperatures of 20.degree. to 500.degree. C.

Abstract: New perfluorinated vinyl ethers containing a secondary hydrogen atom in the molecule of the formula I ##STR1## in which n is 0-5, preferably 0-3 and particularly 0-2, are useful intermediate products (particularly for the preparation of polymeric intermediates and of perfluorinated cation exchangers containing carboxyl groups) and are prepared by(a) reacting 3-H-perfluorobutyryl fluoride IIFOC--CF.sub.2 --CHF--CF.sub.3 (II)with hexafluoropropene epoxide III ##STR2## to give the acid fluoride IV ##STR3## in which n has the same meaning as in formula I, (b) pyrolyzing the acid fluoride IV, as such or after conversion into the corresponding alkali metal carboxylate, at elevated temperature and(c) isolating the vinyl ether I formed in the pyrolysis.

Abstract: A perfluorocarbonyl compound of the formula ##STR1## wherein R.sub.f is perfluoroalkyl having 1 to 10 carbon atoms,R'.sub.f is perfluoroalkylene having 1 to 10 carbon atoms,R is fluorine, chlorine, perfluoroalkyl having 1 to 10 carbon atoms, or is alkoxy having 1 to 10 carbon atoms, andn is 0 to 10.

Abstract: Omega-fluorosulfato-perfluoro-(2-methyl-alkan-3-ones) of the formula ##STR1## which are intermediates in the preparation of perfluoro-isopropylketocarboxylic acid fluorides from omega-hydro-perfluoro-(2-methyl-alkan-3-ones).

Abstract: What are disclosed are methods for making compounds of the formulaFSO.sub.2 --O--CF.sub.2 --R.sub.f --COY,useful as intermediates for making perfluorinated vinyl ethers, wherein R.sub.f is a single bond or perfluoralkylene and Y is fluorine or --OR, by heating an .alpha.,.omega.-bis-fluorosulfatoperfluoroalkane of the formulaFSO.sub.2 --O--CF.sub.2 --R.sub.f --CF.sub.2 --O--SO.sub.2 Fin the presence of an alkali metal fluoride and/or an alkali metal hydrogen fluoride and, when Y is OR, in the presence of an alkanol, ROH.

Abstract: Hexafluoroacetone is prepared by a rearrangement of hexafluoropropene epoxide at an elevated temperature in the presence of hydrogen fluoride as a catalyst and, if appropriate, also as a solvent. In many cases the solution of hexafluoroacetone in hydrogen fluoride obtained in this process can be directly employed without further working-up or purification in further reactions of hexafluoroacetone, for example with phenol and/or o-cresol.

Abstract: Monohydroperfluoroalkanesulfonic acid halides of the formula I ##STR1## in which R.sub.f =F or perfluoroalkyl, X=Cl or F and n=1-7, are prepared by reacting monohydroperfluoroalkanesulfonic acids of the formula II ##STR2## in which R.sub.f and n have the same meaning as in formula I, with pyrocatechol-phosphorus trichloride (.fwdarw.compounds I in which X=Cl) and, if desired, further reacting the products with alkali metal fluorides and/or alkali metal hydrogen fluorides (.fwdarw.compounds I in which X=F). With the exception of the compound in which R.sub.f =F, n=1 and X=Cl (.dbd.HCF.sub.2 --CF.sub.2 --SO.sub.2 Cl), the compounds I are new.The compounds I are chiefly intermediates in organic fluorine chemistry, in particular for the preparation of perfluorinated ion exchanger resins containing sulfonic acid groups.

Abstract: 2,3-Perfluoro-1,4-dioxanes of the formula I ##STR1## wherein X and Y independently from one another mean F or CF.sub.3, are manufactured by reacting carbonyl compounds of the formula II ##STR2## wherein X has the same meaning as in formula I,Y' has the same meaning as Y in formula I (F, CF.sub.3), and additionally can be Cl andZ=Cl, mesylate [=OSO.sub.2 CH.sub.3 ] or tosylate=[OSO.sub.2 C.sub.4 H.sub.6 --CH.sub.3 (p)],with alkali metal fluorides and/or with ammonium fluoride. The reaction products I, among which those wherein at least one of both radicals X and Y is CF.sub.3 are novel compounds, are solvents for highly fluorinated compounds and intermediates in various application fields.

Abstract: 4,5-Perfluoro-1,3-dioxolanes prepared by the described process have an anesthetic effect.

Abstract: The invention relates to 1,2,2,2-tetrafluoroethyl-fluoromethyl ether, to a process for preparing it and to its use as inhalation anesthetic.The present invention relates to the 1,2,2,2-tetrafluoroethyl-fluoromethyl ether of the formulaCF.sub.3 --CHF--O--CH.sub.2 F Iand to a process for preparing it, which comprises subjecting a 1,2,2,2-tetrahalogenoethyl-methyl ether of the formulaCF.sub.3--n Cl.sub.n CHF.sub.1--m Cl.sub.m --O--CH.sub.3 IIin which n is 0 to 3 and m is 0 or 1, to a partial photochlorination under formation of the 1,2,2,2-tetrahalogenoethyl-chloromethyl ether of the general formulaCF.sub.3--n Cl.sub.n CHF.sub.1--m Cl.sub.m --O--CH.sub.2 Cl IIIin which n and m have the meanings given for formula II, fluorinating the compound obtained of the formula III and isolating the ether obtained from the fluorination mixture by conventional methods.