Method for producing reaction gas containing 1,1,2-trifluoroethane (r-143) and/or (e,z)-1,2-difluoroethylene (r-1132(e,z))

A method for producing a reaction gas containing 1,1,2-trifluoroethane (R-143) and (E,Z)-1,2-difluoroethylene (R-1132 (E,Z)), the method comprising supplying a starting material gas containing difluoromethane (R-32), which has been pre-pressurized to a pressure of 0.1 MPaG or more and 2.0 MPaG or less, in a reactor under a pressure condition lower than the pre-pressurization pressure, and subjecting the starting material gas to a reaction that involves thermal decomposition at a temperature of 600° C. or more and 1000° C. or less, thereby obtaining the reaction gas, wherein the selectivity of R-143 in the reaction gas is 30 to 60 mol %.

A method for producing a reaction gas containing 1,1,2-trifluoroethane (R-143) and/or (E,Z)-1,2-difluoroethylene (R-1132 (E,Z)), the method comprising supplying a starting material gas containing difluoromethane (R-32) and a heat medium with a temperature of 600° C. or more and 1000° C. or less in a reactor, and subjecting the starting material gas to a reaction that involves thermal decomposition at a temperature of 600° C. or more and 1000° C. or less, thereby obtaining the reaction gas, wherein the heat medium contains anhydrous hydrogen fluoride.

A method for producing a reaction gas containing 1,1,2-trifluoroethane (R-143) and/or (E,Z)-1,2-difluoroethylene (R-1132 (E,Z)), the method comprising, before supplying a starting material gas containing difluoromethane (R-32) in a reactor, combining the starting material gas with chlorofluoromethane (R-31) in an amount of 0.01% or more and 10% or less of the volume of the difluoromethane (R-32) to form a mixed gas, and subjecting the mixed gas to a reaction that involves thermal decomposition at a temperature of 600° C. or more and 1000° C. or less, thereby obtaining the reaction gas.