METHOD OF PREPARATION OF TRIFLUOROETHYLENE

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The invention relates to a method for manufacturing trifluoroethylene F1123 (CF2=CHF), including at least one step consisting of reacting R-134a (CF3-CFH2) with a metal hydroxide, preferably an alkaline or alkaline-earth hydroxide. The reaction is carried out either in the liquid phase, preferably with an alkaline hydroxide, or in the gaseous phase with a solid reactant, preferably an alkaline-earth hydroxide, at a temperature of between 120 and 450°C and at a pressure of between 1 and 10 bar absolute.