申请人:Asahi Glass Company, Limited
公开号:EP2586763A1
公开(公告)日:2013-05-01
To provide a process for producing, at a high content ratio, 1,1-dichloro-2,2,3,3,3-pentafluoropropane (HCFC-225ca) which is useful as e.g. a starting material to obtain 1,1-dichloro-2,3,3,3-tetrafluoropropene (CFO1214ya).
The process for producing HCFC-225ca of the present invention comprises subjecting a raw material composed of dichloropentafluoropropane (HCFC-225) including 2,2-dichloro-1,1,1,3,3-pentafluoropropane (HCFC225aa) to an isomerization reaction at a temperature of at most 290°C in a gas phase in the presence of a metal oxide catalyst thereby to isomerize HCFC-225aa to HCFC-225ca.
提供一种以高浓度比率生产1,1-二氯-2,2,3,3,3-五氟丙烷(HCFC-225ca)的工艺,该工艺可用作获得1,1-二氯-2,3,3,3-四氟丙烯(CFO1214ya)的起始原料。
本发明的 HCFC-225ca 生产工艺包括:在气相中,在金属氧化物催化剂存在下,将由包括 2,2-二氯-1,1,1,3,3-五氟丙烷(HCFC225aa)在内的二氯五氟丙烷(HCFC-225)组成的原料在不超过 290°C 的温度下进行异构化反应,从而将 HCFC-225aa 异构化为 HCFC-225ca。