摘要:
The present invention relates to the simultaneous manufacture of difluoromethane (F32) and 1,1,1,2-tetrafluoroethane (F134a) by pyrolysis of chlorodifluoromethane in the presence of hydrogen, working at a temperature above 500.degree. C. in the absence of any catalyst or metal surface. Depending on the operating conditions chosen, this process also makes it possible predominantly to manufacture either F134a or F32.
摘要:
The invention relates to the synthesis of hydrogenperfluoroalkanes R.sub.F H, R.sub.F denoting a perfluoroalkyl radical containing 2 to 20 carbon atoms, by reaction of the corresponding perfluoroalkyl iodide R.sub.F I with an alkali metal hydroxide.The use of methanol as solvent allows the formation of tars to be avoided, an almost total conversion of R.sub.F I and an R.sub.F H of excellent purity to be obtained, and the alkali metal iodide by-product to be recovered easily.
摘要:
The catalysts according to the invention are mixtures of an antimony trihalide and of a titanium tetrahalide.These catalysts can be used for the liquid phase fluorination of halogenated aliphatic hydrocarbons, especially that of chlorinated ethane and ethylene derivatives.
摘要:
Perfluoroalkyl amine oxides of the following formula: ##STR1## where C.sub.n F.sub.2n+1 is a straight or branched perfluorinated chain, n is a whole number from 1 to 20, a is a whole number from 2 to 10, p is a whole number from 0 to 10, R.sub.1 is either a hydrogen atom or an alkyl radical having 1 to 6 carbon atoms, and R.sub.2 and R.sub.3 are alkyl radicals having 1 to 6 carbon atoms, and the use of the amine oxides as surface active agents particularly in fire extinguishing compositions.
摘要翻译:下式的全氟烷基氧化胺:其中C n F 2n + 1为直链或支链全氟链,n为1〜20的整数,a为2〜10的整数,p为整数 0至10的数,R1是氢原子或具有1至6个碳原子的烷基,R2和R3是具有1至6个碳原子的烷基,以及使用氧化胺作为表面活性剂,特别是在 灭火组合物。
摘要:
The invention relates to the preparation of perfluoroalkyl bromides or bromoperfluoroalkanes, CnF.sub.2n+1 -Br (n=1 to 20).Gaseous hydrogen bromide is reacted with a perfluoroalkanesulphonyl chloride, C.sub.n F.sub.2n+1 -SO.sub.2 Cl, in the presence of a catalyst consisting of a tertiary amine or phosphine or a quaternary ammonium or phosphonium salt, at a temperature ranging from 80.degree. to 200.degree. C.
摘要:
This invention concerns new branched perfluoroalkylated ethenes, their preparation and their use, in the form of aqueous emulsions, as oxygen carriers, and in particular as blood substitutes or as perfusion agents for the preservation of organs before transplant.
摘要:
A fluorinated sulphobetaine compound of the general formula ##STR1## wherein R.sub.F represents a straight-chained or branched perfluorinated aliphatic chain C.sub.n F.sub.2n+1 (n being an integer between 1 and 20), a is an integer between 0 and 10, X is CO or SO.sub.2, p is an integer between 0 and 10, R.sub.1 is a hydrogen atom or an alkyl group containing 1 to 6 carbon atoms, R.sub.2 and R.sub.3 are each alkyl radicals containing 1 to 6 carbon atoms, and Z is a bivalent organic group; and fire extinguishing compositions comprising such fluorinated sulphobetaine compounds.
摘要翻译:一种通式为“IMAGE”的氟化磺基甜菜碱化合物,其中RF表示直链或支链全氟化脂族链CnF2n + 1(n为1至20之间的整数),a为0至10之间的整数,X为CO或 SO 2,p为0〜10的整数,R 1为氢原子或碳原子数为1〜6的烷基,R 2和R 3为碳原子数为1〜6的烷基,Z为二价有机基团。 以及包含这种氟化磺基甜菜碱化合物的灭火组合物。