Process for the preparation of 2, 3, 3, 3-tetrafluoropropene

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United States of America Patent

PATENT NO 9862661
SERIAL NO

15535300

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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.

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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
Du, Yongmei Shaanxi, CN 4 2
Han, Sheng Shaanxi, CN 14 43
Hao, Zhijun Shaanxi, CN 4 2
Kang, Jianping Shaanxi, CN 1 1
Li, Chunying Shaanxi, CN 9 12
Li, Fengxian Shaanxi, CN 4 2
Lv, Jian Shaanxi, CN 20 7
Ma, Hui Shaanxi, CN 76 307
Zeng, Jijun Shaanxi, CN 2 2
Zhang, Wei Shaanxi, CN 2625 19909

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