Title:
AZEOTROPIC MIXTURE COMPOSED OF PENTAFLUOROETHANE AND HYDROGEN FLUORIDE AND PROCESS FOR PRODUCING PENTAFLUOROETHANE
Document Type and Number:
WIPO Patent Application WO/1994/022797
Kind Code:
A1
Abstract:
The invention provides a minimum-boiling-point azeotropic binary mixture substantially composed of hydrogen fluoride (HF) and pentafluoroethane (HFC-125). Also provided is a process for producing HFC-125 comprising the steps of distilling a mixture containing HFC-125 and HF, drawing an azeotropic mixture out of the column top, and recovering either HFC-125-free HF or HF-free HFC-125 from the column bottom, thereby recovering more effectively either HFC-125-free HF or HF-free HFC-125 from the mixture containing HFC-125 and HF.
Inventors:
TSUDA TAKEHIDE (JP)
KOMATSU SATOSHI (JP)
KOMATSU SATOSHI (JP)
Application Number:
PCT/JP1994/000559
Publication Date:
October 13, 1994
Filing Date:
April 05, 1994
Export Citation:
Assignee:
DAIKIN IND LTD (JP)
TSUDA TAKEHIDE (JP)
KOMATSU SATOSHI (JP)
TSUDA TAKEHIDE (JP)
KOMATSU SATOSHI (JP)
International Classes:
C01B7/19; C07C17/38; C07C17/383; C07C19/08; (IPC1-7): C07C19/08; C07C17/38
Foreign References:
US5196616A | 1993-03-23 | |||
JPH02196734A | 1990-08-03 |
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