PROCESS FOR THE JOINT PREPARATION OF 1, 3, 3, 3-TETRAFLUOROPROPENE AND 2, 3, 3, 3-TETRAFLUOROPROPENE

Title:

PROCESS FOR THE JOINT PREPARATION OF 1, 3, 3, 3-TETRAFLUOROPROPENE AND 2, 3, 3, 3-TETRAFLUOROPROPENE

Document Type and Number:

WIPO Patent Application WO/2016/090744

Kind Code:

A1

Abstract:

A process for the joint preparation of 1, 3, 3, 3-tetrafluoropropene and 2, 3, 3, 3-tetrafluoropropene, comprising: a. a starting material of at least one compound having the structure of formula I, II, or III is 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 CF 2-mCl m＝CCl-CHF 2-nCl n (formula I), CF 3-pCl pCHCl＝CH 2Cl (formula II), and CF 3-xCl xCF 2-yCl yCHF 2-zCl z (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-fluoro-3, 3-difluoropropyne, 3-fluoro-2, 3, 3-trifluoropropene, and 3-fluoro-1, 3, 3-trifluoropropene; c. the 3-fluoro-3, 3-difluoropropyne, 3-fluoro-2, 3, 3-trifluoropropene, and 3-fluoro-1, 3, 3-trifluoropropene are reacted with hydrogen fluoride, simultaneously yielding 1, 3, 3, 3-tetrafluoropropene and 2, 3, 3, 3-tetrafluoropropene.

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Inventors:

LV JIAN (CN)
MA HUI (CN)
WANG BO (CN)
ZHANG WEI (CN)
YANG ZHIQIANG (CN)
GU YUJIE (CN)
MAO WEI (CN)
ZENG JIJUN (CN)
TANG XIAOBO (CN)
ZHANG ZHENHUA (CN)

Application Number:

PCT/CN2015/072304

Publication Date:

June 16, 2016

Filing Date:

February 05, 2015

Export Citation:

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Assignee:

XI’AN MODERN CHEMISTRY RES INST (CN)

International Classes:

C07C21/18; C07C17/20; C07C17/21

Domestic Patent References:

WO2012148695A2	2012-11-01
WO2012154227A2	2012-11-15

Foreign References:

CN103896725A	2014-07-02
CN102603465A	2012-07-25
CN101028992A	2007-09-05

Attorney, Agent or Firm:

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

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