Title:
METHOD FOR SEPARATING VINYLIDENE FLUORIDE AND TRIFLUOROMETHANE AND METHOD FOR PRODUCING VINYLIDENE FLUORIDE
Document Type and Number:
WIPO Patent Application WO/2015/072305
Kind Code:
A1
Abstract:
Provided are: a method for efficiently separating vinylidene fluoride (VdF) and trifluoroethane (R23) from a mixture comprising VdF and R23; and a method for efficiently producing VdF. This method for separating VdF and R23 comprises: a step of adding a first extraction solvent selected from the group consisting of alcohols having 1 to 3 carbon atoms, ketones, esters, amides, ethers, sulfoxides, and nitriles to a first mixture comprising VdF and R23 to obtain a second mixture; and an extractive distillation step of distilling the second mixture to obtain a distillate based on VdF and a bottom which is based on the first extraction solvent and includes R23.
Inventors:
OTSUKA TETSUO (JP)
FURUTA SHOJI (JP)
FURUTA SHOJI (JP)
Application Number:
PCT/JP2014/078271
Publication Date:
May 21, 2015
Filing Date:
October 23, 2014
Export Citation:
Assignee:
ASAHI GLASS CO LTD (JP)
International Classes:
C07C17/383; C07C19/08; C07C21/18
Foreign References:
| JP2009542650A | 2009-12-03 | |||
| JP2007055934A | 2007-03-08 | |||
| JPH0269425A | 1990-03-08 | |||
| JP2006257019A | 2006-09-28 | |||
| JPH08104656A | 1996-04-23 | |||
| JPH083082A | 1996-01-09 | |||
| JPH05505600A | 1993-08-19 |
Attorney, Agent or Firm:
SENMYO, Kenji et al. (JP)
Spring name Kenji (JP)
Spring name Kenji (JP)
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