Title:
METHOD FOR PURIFYING 2,3,3,3-TETRAFLUOROPROPENE
Document Type and Number:
WIPO Patent Application WO/2012/105700
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a method for purifying R-1234yf, by which it is possible to efficiently remove even impurities such as R-1243zf, which is difficult to separate by distillation purification, from a gas generated by reacting R-1214ya with hydrogen or other mixture having R-1234yf as a primary component and including a variety of impurities. A method for purifying R-1234yf has a step of bringing a mixture, which contains R-1234yf as a primary component and also contains hydrohaloalkene impurities other than R-1234yf and hydrohaloalkane impurities, into contact with a solvent that has an extraction/removal index (r), as represented by the formula r = [4 × (δD - 17.2)2 + (δP - 8.3)2 + (δH - 2.6)2]½, of 6.5 or less so as to remove hydrohaloalkane impurities or at least some of the hydrohaloalkene impurities.
More Like This:
Inventors:
KURASHIMA KAZUYOSHI (JP)
WATANABE KUNIO (JP)
YAMAMOTO HIROSHI (JP)
WATANABE KUNIO (JP)
YAMAMOTO HIROSHI (JP)
Application Number:
PCT/JP2012/052545
Publication Date:
August 09, 2012
Filing Date:
February 03, 2012
Export Citation:
Assignee:
ASAHI GLASS CO LTD (JP)
KURASHIMA KAZUYOSHI (JP)
WATANABE KUNIO (JP)
YAMAMOTO HIROSHI (JP)
KURASHIMA KAZUYOSHI (JP)
WATANABE KUNIO (JP)
YAMAMOTO HIROSHI (JP)
International Classes:
C07C17/38; C07C21/18
Domestic Patent References:
| WO2008060614A2 | 2008-05-22 |
Foreign References:
| JPH09255597A | 1997-09-30 | |||
| JPS56166128A | 1981-12-21 | |||
| JP2010509333A | 2010-03-25 | |||
| JP2010202640A | 2010-09-16 | |||
| JP2010037343A | 2010-02-18 | |||
| JP2012001495A | 2012-01-05 |
Other References:
See also references of EP 2671860A4
Attorney, Agent or Firm:
SENMYO, Kenji et al. (JP)
Spring name Kenji (JP)
Spring name Kenji (JP)
Download PDF:
Claims: