申请人:Central Glass Company, Limited
公开号:US20150038749A1
公开(公告)日:2015-02-05
Disclosed is a process for producing 2-chloro-1,3,3,3-tetrafluoropropene (1224), including a first step of separating 2,3-dichloro-1,1,1,3-tetrafluoropropane 234da) into erythro form and threo form, and a second step of bringing the separated erythro form or threo form in contact with a base to obtain 2-chloro-1,3,3,3-tetrafluoropropene (1224). The first step is a step of separating 234da by distillation to achieve a separation into a fraction containing mainly erythro form and a fraction containing mainly threo form. In the second step, 1224 cis form is obtained from the erythro form, and 1224 trans form is obtained from the threo form. By this process, it is possible to selectively and efficiently produce cis form or trans form of 2-chloro-1,3,3,3-tetrafluoropropene (1224).
本发明公开了一种生产2-氯-1,3,3,3-四氟丙烯(1224)的方法,包括第一步将2,3-二氯-1,1,1,3-四氟丙烷(234da)分离成顺式形式和反式形式,第二步将分离后的顺式形式或反式形式与碱接触以获得2-氯-1,3,3,3-四氟丙烯(1224)。第一步是通过蒸馏将234da分离成主要含顺式形式的分馏液和主要含反式形式的分馏液。在第二步中,从顺式形式得到1224顺式形式,从反式形式得到1224反式形式。通过此方法,可以有选择性地高效地生产2-氯-1,3,3,3-四氟丙烯(1224)的顺式形式或反式形式。