To obtain the subject compounds that contains trihydrofluorinated saturated hydrocarbon and dihydrofluorinated saturated hydrocarbon at a specific ratio by treatment of crude perfluoroalkenes with activated carbon followed by catalytic hydrogenation of the treated product.

Fluorinated saturated hydrocarbon including reduced-polar hydrocarbon umpurities and expressed by formula I (R3 is -CF=CF-; Rf1 and Rf2 are each perfluoroalkyl, fluorine, H, at lease one of them is a perfluoroalkyl and Rf1 and Rf2 may link to each other to form a ring of perfluoroalkylene chain) is poured into activated carbon as a nonpolar adsorbent, they are stirred and treated with pressurized hydrogen over a ≤5 wt.% Pd on a carrier catalyst whereby the objective fluorinated saturated hydrocarbon is obtained that contains 10-95 mol.% of chained or cyclic trihydrofluorinated hydrocarbons of the formula (R1 is a group formed by linking CHF to CH2) and the rest of dihydrofluorinated hydrocarbon of formula III (R2 is a group formed by linking CHF to CHF).