Title:
METHOD FOR SEPARATING 2-CHLORO-1,1,1,2-TETRAFLUOROPROPANE AND 2-CHLORO-3,3,3-TRIFLUOROPROPENE
Document Type and Number:
WIPO Patent Application WO/2018/090507
Kind Code:
A1
Abstract:
Provided is an efficient method for separating 2-chloro-1,1,1,2-tetrafluoropropane and 2-chloro-3,3,3-trifluoropropene, having a green and safe operation process. The method uses a halogenated hydrocarbon, an alcohol, an ether, a nitrile, a ketone, an amide or a sulfoxide with a boiling point within the range of 50ºC - 250ºC as an extraction agent, and a mixture of 2-chloro-1,1,1,2-tetrafluoropropane and 2-chloro-3,3,3-trifluoropropene is separated by extraction and rectification, wherein the mass ratio of the extraction agent to the mixture of 2-chloro-1,1,1,2-tetrafluoropropane and 2-chloro-3,3,3-trifluoropropene is 4:1 - 10:1.
Inventors:
LV JIAN (CN)
ZENG JIJUN (CN)
HAN SHENG (CN)
TANG XIAOBO (CN)
ZHANG WEI (CN)
HAO ZHIJUN (CN)
YANG ZHIQIANG (CN)
LI CHEN (CN)
KANG JIANPING (CN)
WANG BO (CN)
LI FENGXIAN (CN)
ZENG JIJUN (CN)
HAN SHENG (CN)
TANG XIAOBO (CN)
ZHANG WEI (CN)
HAO ZHIJUN (CN)
YANG ZHIQIANG (CN)
LI CHEN (CN)
KANG JIANPING (CN)
WANG BO (CN)
LI FENGXIAN (CN)
Application Number:
PCT/CN2017/076408
Publication Date:
May 24, 2018
Filing Date:
March 13, 2017
Export Citation:
Assignee:
XIAN MODERN CHEMISTRY RES INST (CN)
International Classes:
C07C19/10; C07C17/386
Foreign References:
| CN104781219A | 2015-07-15 |
Other References:
ZHAO CHENGBU: "Extractive Distillation Process and examples", EXTRACTIVE DISTILLATION AND AZEOTROPIC DISTILLATION, 30 November 1988 (1988-11-30), pages 45 - 46
Attorney, Agent or Firm:
CHINA NORTH INDUSTRIES GROUP CORPORATION PATENT CENTER (CN)
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