申请人:Arkema France
公开号:US10766837B2
公开(公告)日:2020-09-08
The invention refers to a process for the production of 2,3,3,3-tetrafluoropropene carried out starting from a starting composition comprising the stages of bringing the starting composition into contact, in the presence of a catalyst, with HF in order to produce a composition A comprising 2,3,3,3-tetrafluoropropene (HFO-1234yf), intermediate products B consisting of 2-chloro-3,3,3-trifluoropropene (HCFO-1233xf), 1,1,1,2,2-pentafluoropropane (HFC-245cb), and byproducts C consisting of E-1-chloro-3,3,3-trifluoro-1-propene (HCFO-1233zdE), trans-1,3,3,3-tetrafluoro-1-propene (HFO-1234zeE) and 1,1,1,3,3-pentafluoropropane (HFC-245fa); recovery of said composition A and purification of the latter in order to form and recover a first gas stream G1 comprising HCl, 2,3,3,3-tetrafluoropropene (HFO-1234yf), a part of the unreacted HF, a part of the intermediate products B and a part of the byproducts C; and a stream, which is preferably liquid, L1 comprising a part of the unreacted HF, a part of the intermediate products B and a part of the byproducts C.
本发明涉及一种从起始组合物开始生产 2,3,3,3-四氟丙烯的工艺,包括以下阶段: 在催化剂存在的情况下,使起始组合物与 HF 接触,以生产由 2,3,3,3-四氟丙烯 (HFO-1234yf)组成的组合物 A、中间产品 B 包括 2-氯-3,3,3-三氟丙烯(HCFO-1233xf)、1,1,1,2,2-五氟丙烷(HFC-245cb),以及副产品 C 包括 E-1-氯-3,3,3-三氟-1,1,1,2,2-五氟丙烷(HFC-245cb)、3,3-三氟-1-丙烯(HCFO-1233zdE)、反式-1,3,3,3-四氟-1-丙烯(HFO-1234zeE)和 1,1,1,3,3-五氟丙烷(HFC-245fa)组成的副产品 C;回收所述成分 A 并对后者进行提纯,以形成并回收第一气流 G1,其中包括盐酸、2,3,3,3-四氟丙烯 (HFO-1234yf)、部分未反应的氢氟酸、部分中间产物 B 和部分副产品 C;以及最好是液体的气流 L1,其中包括部分未反应的氢氟酸、部分中间产物 B 和部分副产品 C。