METHOD FOR CATALYTIC SYNTHESIS OF PARTIALLY HALOGENATED PROPANES AND PARTIALLY FLUORINATED BUTANES (VERSIONS) Russian patent published in 2011 - IPC C07C17/278 C07C19/08 

FIELD: chemistry.

SUBSTANCE: invention relates to a method for synthesis of partially halogenated propane or partially fluorinated butane, involving: reaction of partially fluorinated methane, which is selected from a group comprising CH₂F₂ to CH₃F, with fluoro-olefin, which is selected from a group comprising CF₂=CF₂, ClFC=CF₂ and CF₃CF₂=CF₂, in the presence of a catalyst - modified aluminium chloride, where the modified aluminium chloride has formula AlCl_3-xF_x, in which x ranges from approximately 1.0 to approximately 2.8 or modified aluminium bromide, where the modified aluminium bromide has formula AlBr_3-yF_y, in which y ranges from approximately 2.7 to 2.95. During the process, the catalyst is first fed into a reaction vessel and then partially fluorinated methane is fed into the reaction vessel. Further, said partially fluorinated methane can react with said fluoro-olefin at temperature between 0°C and 100°C, where molar ratio of said partially fluorinated methane to said fluoro-olefin is at least 1:1, and where the reaction is carried out in an inert solvent which is the reaction product - partially fluorinated propane or partially fluorinated butane.

EFFECT: reduced amount of by-products.

30 cl, 2 tbl, 6 ex