公开(公告)号：US20160107959A1

公开(公告)日：2016-04-21

申请号：US14978789

申请日：2015-12-22

Applicant: Arkema France

Inventor： Anne PIGAMO ,  Michel DEVIC ,  Laurent WENDLINGER

IPC: C07C17/25 ,  C07C17/354

CPC classification number: C07C17/25 ,  C07C17/354 ,  C07C21/18 ,  Y02P20/582 ,  C07C19/08

Abstract: A subject-matter of the invention is a process for the preparation of 2,3,3,3-tetrafluoro-1-propene which comprises the following stages: (i) hydrogenation of hexafluoropropylene to give 1,1,1,2,3,3-hexafluoropropane; (ii) dehydrofluorination of the 1,1,1,2,3,3-hexafluoropropane obtained in the preceding stage to give 1,2,3,3,3-pentafluoro-1-propene; (iii) hydrogenation of the 1,2,3,3,3-pentafluoro-1-propene obtained in the preceding stage to give 1,1,1,2,3-pentafluoropropane; and (iv) dehydrofluorination of the 1,1,1,2,3-pentafluoropropane obtained in the preceding stage to give 2,3,3,3-tetrafluoro-1-propene. Stages (ii) and (iv) are carried out using a water and potassium hydroxide mixture with the potassium hydroxide representing between 58 and 86% by weight of the mixture and at a temperature of between 110 and 180° C.

Abstract translation: 本发明的主题是制备2,3,3,3-四氟-1-丙烯的方法，其包括以下步骤：（i）六氟丙烯的氢化，得到1,1,1,2,3 ，3-六氟丙烷; （ii）前段得到的1,1,1,2,3,3-六氟丙烷的脱氟化氢，得到1,2,3,3,3-五氟-1-丙烯; （iii）在前一阶段获得的1,2,3,3,3-五氟-1-丙烯的氢化，得到1,1,1,2,3-五氟丙烷; 和（iv）前一阶段获得的1,1,1,2,3-五氟丙烷的脱氟化氢，得到2,3,3,3-四氟-1-丙烯。 阶段（ii）和（iv）使用氢氧化钾与氢氧化钾混合物进行，其中氢氧化钾占混合物重量的58-86％，在110-180℃的温度下进行。