申请人:OKAMOTO Hidekazu
公开号:US20100185028A1
公开(公告)日:2010-07-22
To provide a method for producing 1,1-dichloro-2,2,3,3,3-pentafluoropropane (HCFC-225ca) at a high content ratio, which is useful as e.g. a starting material to obtain 1,1-dichloro-2,3,3,3-tetrafluoropropene (R1214ya).
The method comprises subjecting a starting material comprising one isomer or a mixture of at least two isomers of dichloropentafluoropropane (HCFC-225) and having a HCFC-225ca content of less than 60 mol%, to an isomerization reaction in the presence of a Lewis acid catalyst or a metal oxide catalyst so as to increase the HCFC-225ca content in the product to be higher than the content in the starting material.
提供一种生产1,1-二氯-2,2,3,3,3-五氟丙烷(HCFC-225ca)的方法,该方法可在高含量比下生产该物质,该物质可用作获得1,1-二氯-2,3,3,3-四氟丙烯(R1214ya)的起始物质。该方法包括将含有1种异构体或至少两种二氯五氟丙烷(HCFC-225)异构体混合物的起始物质,其HCFC-225ca含量低于60摩尔%,在Lewis酸催化剂或金属氧化物催化剂存在下,进行异构化反应,以使产品中的HCFC-225ca含量高于起始物质中的含量。