Porous calcium fluoride having a large surface area, a method for producing the same, a catalyst (for hydrogenation reaction in particular) using the porous calcium fluoride as a carrier with superior activity, selectivity, and durability, and a method for producing trihydrofluorocarbon using the catalyst. The porous calcium fluoride having a BET surface area of 20 m
2
/g to 200 m
2
/g is prepared by reacting soda lime with hydrogen fluoride. The carried cataryst (for hydrogenation reaction in particurar) is obtained by causing a metal or metal compound to be carried on carrier formed of the porous calcium fluoride. Trihydrofluorocarbon (2) is produced by causing a fluooroalkene (
1
) to contact hydrogen in the presence of the catalyst for hydrogenation reaction.
wherein X denotes a halogen atom, Rf
1
and Rf
2
individually denote a fluorine or a parafluoroalkyl group, and Rf
1
may be bonded to Rf
2
to form a ring.
具有大表面积的多孔
氟化钙,生产该多孔
氟化钙的方法,以多孔
氟化钙作为载体的催化剂(特别用于氢化反应),具有优越活性、选择性和耐久性,以及使用该催化剂生产三
氟碳化氢的方法。具有20 m2/g至200 m2/g的BET表面积的多孔
氟化钙是通过
氢氟酸与
苏打石灰反应制备的。携带的催化剂(特别用于氢化反应)是通过使
金属或
金属化合物携带在多孔
氟化钙形成的载体上而获得的。在催化剂存在下,通过使
氟烯烃(1)与
氢气接触来生产三
氟碳化氢(2),其中X表示卤素原子,Rf1和Rf2分别表示
氟原子或对氟烷基基团,且Rf1可能与Rf2结合形成环。