POROUS CALCIUM FLUORIDE, ITS PRODUCING METHOD, CATALYST FOR HYDROGENATION REACTION AND METHOD FOR PRODUCING TRIHYDROFLUOROCARBON

摘要

PROBLEM TO BE SOLVED: To produce porous calcium fluoride having a larger surface area than that of conventional one, to provide its producing method, to produce a carried catalyst (in particular, a catalyst for a hydrogenation reaction) of which the carrier is porous calcium fluoride and superior in activity, selectivity and durability, and to provide a method for producing trihydrofluorocarbon using the catalyst.;SOLUTION: Porous calcium fluoride having BET surface area of 20-200 m²/g is produced by a reaction of soda lime with hydrogen fluoride. The carried catalyst (catalyst for hydrogenation reaction) comprises a metal or a metal compound on porous calcium fluoride carrier. Trihydrofluorocarbon (2) is produced by contacting fluoroalkene (1) with hydrogen in the presence of the catalyst. (In the formula, X denotes a halogen atom, Rf₁ and Rf₂ denote fluorine or a parafluoroalkyl group, Rf₁ and Rf₂ may be connected and form a ring.).;COPYRIGHT: (C)2002,JPO