PURPOSE: To efficiently obtain the subject compounds expectable for use of blowing agent, etc., similar to fluorocarbon selectively and in high yield by using tetrahydrohalogenopropanes as raw material and fluorinating in gas phase in the presence of HF and specific fluorinating catalyst.
CONSTITUTION: Tetrahydrohalogenopropanes having dihalogenomethylene group expressed by formula I (0≤m≤1) such as 1,3-dichloro-2,2difluoropropane is fluorinated by reacting with HF in the presence of fluorinating catalyst composed of at least one halide or oxide containing at least one element selected from Al, Cr, Mg, Ca, Ba, Sr, Fe, Ni, Co and Mn of oxide selected from Cr(NO3)3 and Mg(NO3)2, etc., preferably in the co-presence of O2 or Cl2, in gas phase at 150-550°C in normal pressure or under pressure for 0.1-300sec to afford the aimed compounds expressed by formula II (1≤n≤2) such as 1-chloro-2,2,3- trifluoropropane.
SAMEJIMA SHUNICHI
ONISHI KEIICHI
TATEMATSU SHIN
OMORI TAKASHI
TANUMA TOSHIHIRO
