Process for the joint preparation of 1, 3, 3, 3-tetrafluoropropene and 2, 3, 3, 3-tetrafluoropropene

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United States of America Patent

PATENT NO 9873649
SERIAL NO

15535260

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Abstract

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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.

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Patent Owner(s)

Patent OwnerAddress
XI'AN MODERN CHEMISTRY RESEARCH INSTITUTE710065 NO EIGHT NO 168 EAST ROAD YANTA DISTRICT SHAANXI XI'AN XI'AN CITY SHAANXI PROVINCE 710065

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Gu, Yujie Shaanxi, CN 6 1
Lv, Jian Shaanxi, CN 20 7
Ma, Hui Shaanxi, CN 76 307
Mao, Wei Shaanxi, CN 101 482
Tang, Xiaobo Shaanxi, CN 7 55
Wang, Bo Shaanxi, CN 734 4273
Yang, Zhiqiang Shaanxi, CN 49 95
Zeng, Jijun Shaanxi, CN 2 2
Zhang, Wei Shaanxi, CN 2625 19909
Zhang, Zhenhua Shaanxi, CN 217 919

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