Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
METHOD FOR PRODUCING DIFLUOROETHYLENE
Document Type and Number:
WIPO Patent Application WO/2019/240233
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a method for efficiently obtaining a desired isomer of HFO-1132 from a composition containing trans-1,2-difluoroethylene (HFO-1132 (E)) and cis-1,2-difluoroethylene (HFO-1132 (Z)). Provided as a means for solving this problem is a method for producing a composition containing HFO-1132 (E) and/or HFO-1132 (Z), the method including: (1) a step for supplying a composition containing HFO-1132 (E) and/or HFO-1132 (Z) to a reactor charged with a catalyst and carrying out an isomerization reaction between HFO-1132 (E) and HFO-1132 (Z); (2) a step for separating the reaction product obtained in step (1) into a first stream comprising mainly HFO-1132 (E) and a second stream comprising mainly HFO-1132 (Z); and (3) a step for recycling the first stream or second stream obtained in step (2) to the reactor and subjecting said stream to the isomerization reaction.

Inventors:
USUI TAKASHI (JP)
NAKAUE TSUBASA (JP)
KOMATSU YUZO (JP)
TAKAHASHI KAZUHIRO (JP)
CHAKI TAKEHIRO (JP)
KUSHIDA MEGUMI (JP)
Application Number:
PCT/JP2019/023556
Publication Date:
December 19, 2019
Filing Date:
June 13, 2019
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
DAIKIN IND LTD (JP)
International Classes:
C07C17/358; B01J27/132; C07C21/18; C07B61/00
Domestic Patent References:
WO2013161692A12013-10-31
Foreign References:
JP2014111665A2014-06-19
JP2014520070A2014-08-21
JP2017110020A2017-06-22
JP2010523635A2010-07-15
JPH05146680A1993-06-15
Other References:
CRAIG, N. C. ET AL.: "Thermodynamics of cis-trans isomerizatians, the 1, 2-difluoroethylenes", JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, vol. 83, no. 14, 20 July 1961 (1961-07-20), pages 3047 - 3050, XP055663370
WAMPLER, F. B.: "TheSO2 ( sulfur dioxide) (3B1) photosensitized isomerization of cis-and trans-1, 2-difluoroethylene", INTERNATIONAL JOURNAL OF CHEMICAL KINETICS, vol. 8, no. 4, July 1976 (1976-07-01) - 19 October 2004 (2004-10-19), pages 511 - 517, XP055663372
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, vol. 83, 1961, pages 3047
Attorney, Agent or Firm:
SAEGUSA & PARTNERS (JP)
Download PDF: