Title:
METHOD FOR SEPARATING 2,3,3,3-TETRAFLUOROPROPENE AND 1,1,1,2-TETRAFLUOROETHANE, AND METHOD FOR PRODUCING 2,3,3,3-TETRAFLUOROPROPENE
Document Type and Number:
WIPO Patent Application WO/2015/072460
Kind Code:
A1
Abstract:
Provided are: a method for separating 2,3,3,3-tetrafluoropropene (HFO-1234yf) and 1,1,1,2-tetrafluoroethane (HFC-134a) from a mixture containing HFO-1234yf and HFC-134a with high efficiency; and a method for producing HFO-1234yf with high efficiency employing the aforementioned method.
A method for separating HFO-1234yf and HFC-134a, which comprises: a step of adding a first extraction solvent selected from the group consisting of an alcohol, a ketone, an ester, an amide, an ether, a sulfoxide, a nitrile, a hydrofluoroether having 2 to 4 carbon atoms and dichloropropane to a first mixture containing HFO-1234yf and HFC-134a to produce a second mixture; and an extraction/distillation step of distilling the second mixture to separately produce a distillate containing HFO-1234yf as the main component and a bottom product containing the first extraction solvent as the main component and also containing HFC-134a.
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Inventors:
OTSUKA TETSUO (JP)
FURUTA SHOJI (JP)
FURUTA SHOJI (JP)
Application Number:
PCT/JP2014/079873
Publication Date:
May 21, 2015
Filing Date:
November 11, 2014
Export Citation:
Assignee:
ASAHI GLASS CO LTD (JP)
International Classes:
C07C17/386; C07C21/18
Domestic Patent References:
| WO2012105700A1 | 2012-08-09 | |||
| WO2014103582A1 | 2014-07-03 |
Foreign References:
| JP2013521275A | 2013-06-10 |
Attorney, Agent or Firm:
SENMYO, Kenji et al. (JP)
Spring name Kenji (JP)
Spring name Kenji (JP)
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