Patent number: 10214468
Abstract: This invention discloses a method for co-production of 1-chloro-3,3,3-trifluoropropene, 2,3,3,3-tetrafluoropropene and 1,3,3,3-tetrafluoropropene. This method includes inputting the mixed gases of hydrogen fluoride and 1,1,1,3,3-pentachloropropane together with 1,1,2,3-tetrachloropropene into a first reactor for a reaction to obtain a reaction product; directly inputting the reaction product into a second reactor to perform a reaction in the presence of a catalyst; separating hydrogen chloride from the obtained product; obtaining 1-chloro-3,3,3-trifluoropropene, 2,3,3,3-tetrafluoropropene and 1,3,3,3-tetrafluoropropene respectively after water washing, alkaline washing, drying and rectifying. This invention has the advantages of flexible production, simple process, small investment, low energy consumption and high conversion rate.
Type:
Grant
Filed:
March 8, 2017
Date of Patent:
February 26, 2019
Assignees:
Zhejiang Quzhou Juxin Fluorine Chemical Co., Ltd., Zhejiang Quhua Fluor-Chemistry Co Ltd, Zhejiang Engineering Design Co., Ltd.
Inventors:
Jiangyong Hong, Aiguo Wang, Bo Yang, Yan Zhang, Guojun Yu, Yang Zhao, Hao Ouyang, Hao Pan
Publication number: 20190047925
Abstract: This invention discloses a method for co-production of 1-chloro-3,3,3-trifluoropropene, 2,3,3,3-tetrafluoropropene and 1,3,3,3-tetrafluoropropene. This method includes inputting the mixed gases of hydrogen fluoride and 1,1,1,3,3-pentachloropropane together with 1,1,2,3-tetrachloropropene into a first reactor for a reaction to obtain a reaction product; directly inputting the reaction product into a second reactor to perform a reaction in the presence of a catalyst; separating hydrogen chloride from the obtained product; obtaining 1-chloro-3,3,3-trifluoropropene, 2,3,3,3-tetrafluoropropene and 1,3,3,3-tetrafluoropropene respectively after water washing, alkaline washing, drying and rectifying. This invention has the advantages of flexible production, simple process, small investment, low energy consumption and high conversion rate.
Type:
Application
Filed:
March 8, 2017
Publication date:
February 14, 2019
Applicants:
Zhejiang Quzhou Juxin Fluorine Chemical Co., Ltd., Zhejiang Quhua Fluor-Chemistry Co Ltd, Zhejiang Engineering Design Co., Ltd.
Inventors:
Jiangyong HONG, Aiguo WANG, Bo YANG, Yan ZHANG, Guojun YU, Yang ZHAO, Hao OUYANG, Hao PAN
Patent number: 9856192
Abstract: A method for preparing 2,3,3,3-tetrafluoropropene and 1,3,3,3-tetrafluoropropene, including: providing a first reactor including a first section, a second section, and a third section, with each section being filled with different catalysts, preheating hexafluoropropylene and hydrogen, and introducing the hexafluoropropylene and the hydrogen to the first reactor to yield a first mixture including: 1,1,1,2,3-pentafluoropropane, 1,1,1,2,3,3-hexafluoropropane, and hydrogen fluoride; introducing the first mixture to a first distillation column to yield 1,1,1,2,3,3-hexafluoropropane at a top of the first distillation column and 1,1,1,2,3-pentafluoropropane and hydrogen fluoride at a bottom of the first distillation column, recycling the 1,1,1,2,3,3-hexafluoropropane to a lower part of the first section of the first reactor, and introducing the 1,1,1,2,3-pentafluoropropane and the hydrogen fluoride to a second reactor to yield a second mixture including: 2,3,3,3-tetrafluoropropene, 1,3,3,3-tetrafluoropropene, hydr
Type:
Grant
Filed:
January 12, 2017
Date of Patent:
January 2, 2018
Assignees:
ZHEJIANG QUZHOU JUXIN FLUORINE CHEMICAL CO., LTD., ZHEJIANG QUHUA FLUOR-CHEMISTRY CO., LTD.
Inventors:
Jun Lei, Aiguo Wang, Bo Yang, Yan Zhang, Huadong Zhou, Yang Zhao, Guoan Liu, Yi Zhu, Gang Su
Patent number: 9643904
Abstract: A method for preparing 2,3,3,3-tetrafluoropropene, including: a) introducing hexafluoropropylene and hydrogen to a first reactor for reaction in the presence of a catalyst to obtain a first mixture; b) washing and drying the first mixture, and introducing the treated first mixture to a first distillation column to obtain 1,1,1,2,3,3-hexafluoropropane, 1,1,1,2,3-pentafluoropropene, and hexafluoropropylene; recycling the 1,1,1,2,3,3-hexafluoropropane to the first reactor, and introducing the 1,1,1,2,3-pentafluoropropene and the hexafluoropropylene to a second distillation column to yield hexafluoropropylene and 1,1,1,2,3-pentafluoropropene; and recycling the hexafluoropropylene to the first reactor; c) introducing the 1,1,1,2,3-pentafluoropropene and hydrogen to a second reactor in the presence of a catalyst to obtain a second mixture; and d) washing and drying the second mixture, and introducing the second mixture to a third distillation column to yield 1,1,1,2,3-pentafluoropropane; and recycling the 1,1,1,2,3
Type:
Grant
Filed:
December 13, 2016
Date of Patent:
May 9, 2017
Assignees:
ZHEJIANG QUZHOU JUXIN FLUORINE CHEMICAL CO., LTD., ZHEJIANG QUHUA FLUOR-CHEMISTRY CO., LTD.
Inventors:
Jun Lei, Aiguo Wang, Bo Yang, Yan Zhang, Huadong Zhou, Yang Zhao, Yi Zhu, Haili Xia, Haojin Shi