申请人:OKAMOTO Hidekazu
公开号:US20120004474A1
公开(公告)日:2012-01-05
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.
提供一种生产高含量比例的1,1-二氯-2,2,3,3,3-五氟丙烷(HCFC-225ca)的方法,该方法可用作获得1,1-二氯-2,3,3,3-四氟丙烯(CFO1214ya)的起始物质。本发明的生产HCFC-225ca的方法包括将由二氯五氟丙烷(HCFC-225)组成的原料,包括2,2-二氯-1,1,1,3,3-五氟丙烷(HCFC225aa),在存在金属氧化物催化剂的气相中,在最高290°C的温度下进行异构化反应,从而将HCFC-225aa异构化为HCFC-225ca。