公开(公告)号：US09862661B2

公开(公告)日：2018-01-09

申请号：US15535300

申请日：2015-02-05

申请人： XI'AN MODERN CHEMISTRY RESEARCH INSTITUTE

发明人： Jian Lv ,  Hui Ma ,  Jijun Zeng ,  Wei Zhang ,  Zhijun Hao ,  Sheng Han ,  Yongmei Du ,  Jianping Kang ,  Chunying Li ,  Fengxian Li

IPC分类号： C07C17/23 ,  C07C17/25 ,  C07C17/093 ,  C07C21/18 ,  B01J23/883 ,  C07C17/383 ,  B01J23/89 ,  B01J27/138 ,  B01J35/00 ,  C07C17/20 ,  C07C19/08

CPC分类号： C07C17/23 ,  B01J23/002 ,  B01J23/8892 ,  B01J23/8906 ,  B01J23/894 ,  B01J23/8986 ,  B01J27/138 ,  B01J27/32 ,  B01J35/0006 ,  B01J37/031 ,  B01J37/04 ,  B01J37/26 ,  B01J38/12 ,  B01J2523/00 ,  C07C17/206 ,  C07C17/25 ,  C07C17/383 ,  C07C19/08 ,  C07C21/18 ,  C07C19/10 ,  B01J2523/23 ,  B01J2523/48 ,  B01J2523/72 ,  B01J2523/847 ,  B01J2523/17 ,  B01J2523/22 ,  B01J2523/55 ,  B01J2523/3706 ,  B01J2523/842 ,  B01J2523/36 ,  B01J2523/845 ,  B01J2523/25

摘要： Disclosed is a process for the preparation of 2,3,3,3-tetrafluoropropene, comprising the following two reaction steps: a. a compound having the formula CF3-xClxCF2-yClyCH2Cl undergoes gas-phase fluorination with hydrogen fluoride through n serially-connected reaction vessels in the presence of a compound catalyst, producing 2,3-dichloro-1,1,1,2-tetrafluoropropane, 1,2,3-trichloro-1,1,2-trifluoropropane, and 1,3-dichloro-1,1,2,2-tetrafluoropropane; in said formula, x=1, 2, 3, y=1, 2, and 3≦x+y≦5; b. the 2,3-dichloro-1,1,1,2-tetrafluoropropane, 1,2,3-trichloro-1,1,2-trifluoropropane, and 1,3-dichloro-1,1,2,2-tetrafluoropropane undergo gas-phase dehalogenation with hydrogen in the presence of a dehalogenation catalyst, producing 2,3,3,3-tetrafluoropropene and 3-chloro-2,3,3-trifluoropropene, then separation and refining are performed, producing 2,3,3,3-tetrafluoropropene. The present invention is primarily used to produce 2,3,3,3-tetrafluoropropene.