PROCESS FOR THE PREPARATION OF 1, 3, 3, 3-TETRAFLUOROPROPENE

WIPO Patent Application WO/2016/090743

A1

Disclosed is a process for the preparation of 1, 3, 3, 3-tetrafluoropropene, comprising: a. a compound having the formula CF3-xClxCHClCHF2-yCly and in the presence of a compound catalyst, undergoes, through a number n of serially-connected reaction vessels, gas-phase fluorination with hydrogen fluoride, producing 1, 2, 3-trichloro-1, 1, 3-trifluoropropane, and 1, 2-dichloro-1, 1, 3, 3-tetrafluoropropane; in said formula, x=1, 2, 3; y=1, 2, and 3≤x+y≤5; b. 1, 2, 3-trichloro-1, 1, 3-trifluoropropane, and 1, 2-dichloro-1, 1, 3, 3-tetrafluoropropane undergo, in the presence of a dehalogenation catalyst, gas-phase dehalogenation with hydrogen, producing 3-chloro-1, 3, 3-trifluoropropene, and 1, 1, 3, 3-tetrafluoropropene; c. 3-chloro-1, 3, 3-trifluoropropene and 1, 1, 3, 3-tetrafluoropropene undergo, in the presence of a fluorination catalyst, gas-phase fluorination with hydrogen fluoride, producing 1, 3, 3, 3-tetrafluoropropene. The present invention is primarily used to produce 1,3,3,3-tetrafluoropropene.

LV JIAN (CN)
MA HUI (CN)
GU YUJIE (CN)
WANG BO (CN)
QIN YUE (CN)
ZHANG ZHENHUA (CN)
HAO ZHIJUN (CN)
LI CHUNYING (CN)
LI FENGXIAN (CN)
LV JING (CN)
BAI YANBO (CN)

PCT/CN2015/072303

June 16, 2016

February 05, 2015

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XI’AN MODERN CHEMISTRY RES INST (CN)

C07C17/358; C07C17/20; C07C21/18

CN102282114A	2011-12-14
CN102197012A	2011-09-21
CN101913985A	2010-12-15
CN101028992A	2007-09-05
CN1852880A	2006-10-25
US6472573B1	2002-10-29

HENG TAI INTELLECTUAL PROPERTY AGENCY (CN)
西安恒泰知识产权代理事务所 (CN)

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