METHOD FOR PRODUCING 1,1,1,2,2-PENTAFLUORETHANE Russian patent published in 2008 - IPC C07C19/08 C07C17/21 C07C17/20 B01J23/86 

FIELD: chemistry.

SUBSTANCE: invention relates to the method for producing the pentafluorethane which includes the interaction of mixture containing the fluoric hydrogen and at least one generic substance, chosen from halogenethanes with the formula CX₃-CHX₂ and halogenethenes with the formula CX₂=CX₂, where each X is chosen independently from the group consisting of F and Cl (providing not more than four of X are F), in presence of the fluorination catalyst in the reaction zone, with producing the mixture of HF, HCl, pentafluorethane, insufficiently fluorinated halogenated hydrocarbon intermediate compounds and less than 0.2 mole percent of chlorinepentafluorethane taken from the total halogenated hydrocarbons in the mixture. The fluorination catalyst contains the crystalline cobalt-substituted chromium alpha-oxide (i), where about 0.05 to 6 atom percents of chromium atoms in the crystal lattice of the chromium alpha-oxide are substituted to the trivalent cobalt (ii) and/or fluorinated crystalline oxide (i). The obtained mixture is separated at stage (a) with extraction of CF₃CHF₂ as a product.

EFFECT: high catalyst activity; reduced residue.

2 cl, 3 tbl, 19 ex