Title:
PROCESS FOR PRODUCING TRANS-1,3,3,3-TETRAFLUOROPROPENE
Document Type and Number:
WIPO Patent Application WO/2012/063566
Kind Code:
A1
Abstract:
This process for producing trans-1,3,3,3-tetrafluoropropene includes: a reaction step of reacting 1-chloro-3,3,3-trifluoropropene with hydrogen fluoride to form trans-1,3,3,3-teterafluoropropene and thus obtain a reaction product (A) which contains the formed trans-1,3,3,3-tetrafluoropropene, unreacted 1-chloro-3,3,3-trifluoropropene and hydrogen fluoride, and by-produced cis-1,3,3,3-tetrafluoropropene, 1,1,1,3,3-pentafluoropropane and hydrogen chloride; a rough separation step of distilling the reaction product (A) obtained in the reaction step to recover a bottom product which contains both 1-chloro-3,3,3-trifluoropropene and hydrogen fluoride, and feeding the bottom product to the reaction step; a hydrogen fluoride separation step of separating and recovering hydrogen fluoride from a residue (B) produced by the recovery of the bottom product in the rough separation step, and feeding the hydrogen fluoride to the reaction step; a hydrogen chloride separation step of bringing a residue (C) produced by the recovery of hydrogen fluoride in the hydrogen fluoride separation step into contact with either water or an aqueous sodium hydroxide solution to separate and remove hydrogen chloride; a dehydration/drying step of subjecting a residue (D) produced by the separation of hydrogen chloride in the hydrogen chloride separation step to dehydration; and a purification step of subjecting a residue (E) produced by the dehydration in the dehydration/drying step to distillation to obtain trans-1,3,3,3-tetrafluoropropene. According to the process, the objective product can be efficiently obtained by reusing unreacted raw materials.
Inventors:
HIBINO YASUO
YOSHIKAWA SATOSHI
NISHIGUCHI YOSHIO
OKAMOTO SATORU
SAKYU FUYUHIKO
YOSHIKAWA SATOSHI
NISHIGUCHI YOSHIO
OKAMOTO SATORU
SAKYU FUYUHIKO
Application Number:
PCT/JP2011/071947
Publication Date:
May 18, 2012
Filing Date:
September 27, 2011
Export Citation:
Assignee:
CENTRAL GLASS CO LTD (JP)
HIBINO YASUO
YOSHIKAWA SATOSHI
NISHIGUCHI YOSHIO
OKAMOTO SATORU
SAKYU FUYUHIKO
HIBINO YASUO
YOSHIKAWA SATOSHI
NISHIGUCHI YOSHIO
OKAMOTO SATORU
SAKYU FUYUHIKO
International Classes:
C07C17/20; B01J27/132; C07C17/38; C07C21/18; C07B61/00
Domestic Patent References:
| WO2010035748A1 | 2010-04-01 | |||
| WO2009105521A1 | 2009-08-27 |
Foreign References:
| JP2010180134A | 2010-08-19 | |||
| JPH107604A | 1998-01-13 | |||
| JP2004043410A | 2004-02-12 | |||
| JP2007320896A | 2007-12-13 | |||
| JP2009132626A | 2009-06-18 | |||
| JP2009196900A | 2009-09-03 | |||
| JP2010090045A | 2010-04-22 |
Attorney, Agent or Firm:
KOBAYASHI, Hiromichi et al. (JP)
Hiromichi Kobayashi (JP)
Hiromichi Kobayashi (JP)
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