Title:
METHOD FOR SEPARATING HEXAFLUOROPROPENE FROM FLUORINATED COMPOUND
Document Type and Number:
WIPO Patent Application WO/2015/045927
Kind Code:
A1
Abstract:
Provided is a method for separating HFP from a fluorinated compound having a boiling point that is close to the boiling point of HFP with high efficiency.
A method for separating HFP from a fluorinated compound having a boiling point falling within the range from a temperature that is lower by 10˚C than the boiling point of HFP to a temperature that is higher by 15˚C than the boiling point of HFP, said method being characterized by comprising the steps of: (a) providing a composition to be distilled, which comprises HFP, the fluorinated compound having a boiling point falling within the range from a temperature that is lower by 10˚C than the boiling point of HFP to a temperature that is higher by 15˚C than the boiling point of HFP, and R22; and (b) subjecting the composition to be distilled to a distillation procedure for producing a fraction containing an azeotropic or azeotrope-like composition produced from HFP and R22.
Inventors:
TAKEUCHI YU (JP)
OTSUKA TETSUO (JP)
FURUTA SHOJI (JP)
OTSUKA TETSUO (JP)
FURUTA SHOJI (JP)
Application Number:
PCT/JP2014/074313
Publication Date:
April 02, 2015
Filing Date:
September 12, 2014
Export Citation:
Assignee:
ASAHI GLASS CO LTD (JP)
International Classes:
C07C17/386; C07C21/18
Domestic Patent References:
| WO2013137408A1 | 2013-09-19 |
Foreign References:
| RU2178779C2 | 2002-01-27 | |||
| JPS3919624B1 | 1964-09-11 | |||
| JPS4614725B |
Attorney, Agent or Firm:
SENMYO, Kenji et al. (JP)
Spring name Kenji (JP)
Spring name Kenji (JP)
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