Title:
ペンタフルオロエタンの製造方法
Document Type and Number:
Japanese Patent JP4529287
Kind Code:
B2
Abstract:
A method for efficiently separating pentafluoroethane (HFC-125) from a mixture thereof with chloropentafluoroethane (CFC-115). This method comprises subjecting a mixture (2) comprising HFC-125 (6) and CFC-115 (4) to extractive distillation (1) to give highly concentrated HFC-125 (6), and a hydrofluorocarbon compound (3) having two carbon atoms, particularly 1,1,1,2-tetrafluoroethane, is used as an extractant to obtain concentrated CFC-115 as a distillate and a mixture of HFC-125 having a reduced content of CFC-115 with the extractant as a bottom (5), the extractant being separated from HFC-124 in this mixture by distillation (9) and reused in the extractive distillation.
Inventors:
Kiyoshi Kono
Shun Shibanuma
Shun Shibanuma
Application Number:
JP2000507634A
Publication Date:
August 25, 2010
Filing Date:
August 12, 1998
Export Citation:
Assignee:
Daikin Industries, Ltd.
International Classes:
C07C19/08; C07C17/383; C07C17/386
Domestic Patent References:
| JPH06510980A | 1994-12-08 | |||
| JPH08143486A | 1996-06-04 | |||
| JPH09255597A | 1997-09-30 | |||
| JPH09512793A | 1997-12-22 | |||
| JPH09508626A | 1997-09-02 |
Foreign References:
| WO1996006063A1 | 1996-02-29 |
Attorney, Agent or Firm:
Aoyama Aoi
Yasuo Shibata
Samejima Mutsumi
Yasuo Shibata
Samejima Mutsumi