公开(公告)号：US09873649B2

公开(公告)日：2018-01-23

申请号：US15535260

申请日：2015-02-05

Applicant: XI'AN MODERN CHEMISTRY RESEARCH INSTITUTE

Inventor： Jian Lv ,  Hui Ma ,  Bo Wang ,  Wei Zhang ,  Zhiqiang Yang ,  Yujie Gu ,  Wei Mao ,  Jijun Zeng ,  Xiaobo Tang ,  Zhenhua Zhang

IPC: C07C17/20 ,  C07C17/21 ,  C07C17/23 ,  C07C17/383 ,  B01J37/26 ,  B01J37/08 ,  B01J23/745 ,  B01J37/03

CPC classification number: C07C17/206 ,  B01J23/745 ,  B01J37/035 ,  B01J37/08 ,  B01J37/26 ,  C07C17/21 ,  C07C17/23 ,  C07C17/383 ,  C07C21/18 ,  C07C19/10 ,  C07C21/22

Abstract: A process for the joint preparation of 1,3,3,3-tetrafluoropropene and 2,3,3,3-tetrafluoropropene, comprising: (a) starting materials comprising at least one compound having the structure of formula I, II or III are reacted with hydrogen fluoride, producing 1,2,3-trichloro-3,3-difluoropropene, 1,2,3-trichloro-1,1,2-trifluoropropane, and 1,2,3-trichloro-1,1,3-trifluoropropane; in the compounds of said formulae CF2-mClm═CCl—CHF2-nCln (Formula I), CF3-pClpCHCl═CH2Cl (Formula II), and CF3-xClxCF2-yClyCHF2-zClz (Formula III), m=0, 1, 2; n=1, 2; p=2, 3; x=1, 2, 3; y=1, 2; z=1, 2 and 4≦x+y+z≦6; (b) the 1,2,3-trichloro-3,3-difluoropropene, 1,2,3-trichloro-1,1,2-trifluoropropane and 1,2,3-trichloro-1,1,3-trifluoropropane undergo dechlorination, producing 3-chloro-3,3-difluoropropyne, 3-chloro-2,3,3-trifluoropropene and 3-chloro-1,3,3-trifluoropropene; and (c) the 3-chloro-3,3-difluoropropyne, 3-chloro-2,3,3-trifluoropropene and 3-chloro-1,3,3-trifluoropropene are reacted with hydrogen fluoride, simultaneously yielding 1,3,3,3-tetrafluoropropene and 2,3,3,3-tetrafluoropropen.