PRODUCTION OF 1,1,2,2-TETRAFLUOROETHANE (R-134)

摘要

PURPOSE:To obtain the title compound reducing pressure of devices such as car air conditioner readily, in high yield industrially and advantageously by using a palladium catalyst as a hydrogenating catalyst and adding H2 to tetrafluoroethylene. CONSTITUTION:Tetrafluoroethylene is reacted with H2 in the molar ratio of (1:1)-(1:1.5) in the presence of a palladium catalyst such as Pd/C at 100-150 deg.C to give the aimed compound. An aqueous solution of a salt containing a catalytic component is impregnated into a carrier such as alumina or active carbon, reduced with H2 or boron hydride such as borane or NaBH4 or hypophosphite.