Method for producing purified trans-1,2-difluoroethylene (HFO-1132(E)) and/or 1,1,2-trifluoroethylene (HFO-1123)

A method for producing purified trans-1,2-difluoroethylene (HFO-1132 (E)) and 1,1,2-trifluoroethylene (HFO-1123), comprising:

• a distillation step of distilling a composition 1 comprising difluoromethane (HFC-32) and HFO-1132 (E) and HFO-1123 to obtain a composition 2 in which HFC-32 is reduced from composition 1;
• and
• an extractive distillation step of bringing composition 2 into contact with an extraction solvent to obtain a composition comprising HFO-1132 (E) and HFO-1123, in which HFC-32 is reduced from composition 2,
• wherein composition 2 is composition 2 being an azeotropic composition or azeotrope-like composition comprising HFC-32 and HFO-1132 (E) and HFO-1123, and
• wherein the extraction solvent is at least one compound selected from the group consisting of n-pentane, n-hexane, n-heptane, n-octane, cyclopentane, cyclohexane, cycloheptane, benzene, toluene, dichloromethane, trichloromethane, tetrachloromethane (carbon tetrachloride), 1,1-dichloroethane, 1,2-dichloroethane, 1,1,1-trichloroethane, 1,1,2-trichloroethane, acetonitrile, propanenitrile, isobutyronitrile, di-n-propyl ether, diisopropyl ether, 2-methoxy-2-methylpropane, 2-ethoxy-2-methylpropane, acetone, diethyl ketone, methyl ethyl ketone, methyl isobutyl ketone, cyclopentanone, methanol, ethanol, 1-propanol, 2-propanol, 1-butanol (n-butyl alcohol), 2-methyl-1-propanol (i-butyl alcohol), 2-butanol (sec-butyl alcohol), 2-methyl-2-propanol (t-butyl alcohol), methyl acetate, ethyl acetate, propyl acetate, isopropyl acetate, and butyl acetate.