- Dynamic behaviour of chlorofluoroethanes at fluorinated chromia aerogels and fluorinated zinc(II) or magnesium(II) doped chromia aerogels
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The preparation and characterisation of two series of fluorinated chromia aerogel materials, lightly doped with zinc(II) or magnesium(II), are described. They behave as heterogeneous catalysts for transformations of 1,1,2-trichlorotrifluoroethane under HF
- Bozorgzadeh, Hamid,Kemnitz, Erhard,Nickkho-Amiry, Mahmood,Skapin, Toma?,Winfield, John M.
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- Conversion of 1,1,2-trichlorotrifluoroethane to 1,1,1-trichlorotrifluoroethane and 1,1-dichlorotetrafluoroethane over aluminium-based catalysts
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Conversion of CCl2FCClF2 to CCl2FCF3 is achieved in the temperature range, 593-713 K, under flow conditions by using the catalysts, β-AlF3 or γ-alumina, prefluorinated with CCl2F2/sub
- Bozorgzadeh,Kemnitz,Nickkho-Amiry,Skapin,Winfield
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- Catalytic Liquid-phase Fluorination of Tetrachlorethene (PCE) with Titanium Antimony Mixed Halides
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A new catalyst consisting of a TiCl4-SbCl5 mixture with a molar composition Sb : Ti = 4 : 1 makes possible the fluorination of tetrachlorethene with liquid HF at 90 deg C.
- Batiot, Catherine,Brunet, Sylvette,Barrault, Joel,Blanchard, Michel
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p. 867 - 868
(2007/10/02)
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- REACTIONS OF CHLORINE MONOFLUORIDE. IV. ADDITION OF CHLORINE MONOFLUORIDE TO HALOGEN-SUBSTITUTED ALKENES
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The reactions of chlorine monofluoride with halogenoethylenes (1,1-dichloro-, 1,2-dichloro-, trichloro-, and tetrachloroethylenes) and halogenopropenes ( 3-bromo-, 3,3,3-trichloro-, E- and Z-1,3-dichloro-, 3-chloro-2-methyl-, and perfluoropropenes) were investigated in inert solvents in the presence of ethyl acetate as external nucleophile.In all cases chloroacyloxy adducts were isolated and identified in addition to the chlorofluorination products, and this indicates an electrophilic mechanism for the chlorofluorination of polyhalogenoalkenes.Methyl chloromaleate, chlorofumarate, chlorofluoroethylenedicarboxylate, α,β-difluoroacrylate, and perfluoromethacrylate in anhydrous hydrogen fluoride form the corresponding chlorofluoro adducts with satisfactory yields, whereas the reaction takes place with difficulty in inert solvents.
- Boguslavskaya, L. S.,Chuvatkin, N. N.,Panteleeva, I. Yu.
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p. 1832 - 1842
(2007/10/02)
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