申请人:Arkema France
公开号:US20180370879A1
公开(公告)日:2018-12-27
The invention relates to a process for producing 2,3,3,3-tetrafluoropropene performed using a starting composition, comprising the steps of placing the starting composition in contact with HF, in the presence of a catalyst, to produce a composition A comprising 2,3,3,3-tetrafluoropropene (1234yf), intermediate products B consisting of 2-chloro-3,3,3-trifluoropropene (1233xf), 1,1,1,2,2-pentafluoropropane (245cb), and side products C consisting of E-1-chloro-3,3,3-trifluoro-1-propene (1233zdE), trans-1,3,3,3-tetrafluoro-1-propene (1234zeE) and 1,1,1,3,3-pentafluoropropane (245fa); recovery of said composition A and purification thereof to form and recover a first stream comprising 2,3,3,3-tetrafluoropropene (1234yf) and one or more streams comprising 2-chloro-3,3,3-trifluoropropene (1233xf) and/or 1,1,1,2,2-pentafluoropropane (245cb); recycling into step a) of said one or more streams comprising 2-chloro-3,3,3-trifluoropropene (1233xf) and/or 1,1,1,2,2-pentafluoropropane (245cb).
该发明涉及一种生产2,3,3,3-四氟丙烯的过程,使用起始组成物,包括以下步骤:将起始组成物与HF接触,在催化剂存在下,产生包含2,3,3,3-四氟丙烯(1234yf)的组成物A,中间产物B包括2-氯-3,3,3-三氟丙烯(1233xf)、1,1,1,2,2-五氟丙烷(245cb)和副产物C包括E-1-氯-3,3,3-三氟丙烯-1(1233zdE)、反式-1,3,3,3-四氟丙烯(1234zeE)和1,1,1,3,3-五氟丙烷(245fa);回收所述组成物A并对其进行纯化,以形成和回收包括2,3,3,3-四氟丙烯(1234yf)的第一流和包括2-氯-3,3,3-三氟丙烯(1233xf)和/或1,1,1,2,2-五氟丙烷(245cb)的一个或多个流;将包括2-氯-3,3,3-三氟丙烯(1233xf)和/或1,1,1,2,2-五氟丙烷(245cb)的一个或多个流回收到步骤a)中进行回收利用。