Title:
METHOD FOR PREPARING 2,3,3,3-TETRAFLUOROPROPENE
Document Type and Number:
WIPO Patent Application WO/2016/019485
Kind Code:
A1
Abstract:
Disclosed is a method for preparing 2,3,3,3-tetrafluoropropene, wherein hydrogen fluoride and 1,1,2,3-tetrachloropropene are heated and vaporized, then introduced into a first reactor, and reacted under the action of an A-type catalyst to obtain a mixed product containing 2,3-dichloro-3,3-difluoropropene, with the molar ratio of the hydrogen fluoride to the 1,1,2,3-tetrachloropropene being 5-60:1, the reaction temperature being 200OC-500OC and the space velocity being 200-2000 h-1; and then the mixed product containing 2,3-dichloro-3,3-difluoropropene is introduced into a second reactor after being preheated, and reacted under the action of a B-type catalyst to obtain a mixed product containing 2,3,3,3-tetrafluoropropene, which is separated from impurities to obtain a 2,3,3,3-tetrafluoropropene product, with the reaction temperature in the second reactor being higher than the first reactor by 30OC-180OC, and the temperature of the mixed product containing 2,3-dichloro-3,3-difluoropropylene after being preheated is higher than the reaction temperature in the first reactor and lower than the reaction temperature in the second reactor. In the present invention, a two-step gas phase method is used to synthesize the 2,3,3,3-tetrafluoropropene. The present invention has the advantages of a short process route, a low energy consumption, a high catalyst conversion, a long lifetime and less of the three wastes.
Inventors:
LEI JUN (CN)
YANG BO (CN)
ZHANG YAN (CN)
ZHAO YANG (CN)
ZHOU HUADONG (CN)
ZHOU QIANG (CN)
SU GANG (CN)
YANG BO (CN)
ZHANG YAN (CN)
ZHAO YANG (CN)
ZHOU HUADONG (CN)
ZHOU QIANG (CN)
SU GANG (CN)
Application Number:
PCT/CN2014/001059
Publication Date:
February 11, 2016
Filing Date:
November 28, 2014
Export Citation:
Assignee:
ZHEJIANG QUHUA FLUOR CHEMISTRY CO LTD (CN)
International Classes:
C07C21/18; C07C17/20
Domestic Patent References:
| WO2013130385A1 | 2013-09-06 |
Foreign References:
| CN103108851A | 2013-05-15 | |||
| CN104151131A | 2014-11-19 |
Other References:
See also references of EP 3178803A4
Attorney, Agent or Firm:
NINGBO AOSHENG PATENT AGENT OFFICE(GENERAL PARTNERSHIP) (CN)
宁波奥圣专利代理事务所（普通合伙） (CN)
宁波奥圣专利代理事务所（普通合伙） (CN)
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