AZEOTROPIC MIXTURE COMPOSED OF PENTAFLUOROETHANE AND HYDROGEN FLUORIDE AND PROCESS FOR PRODUCING PENTAFLUOROETHANE

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)

Application Number:

PCT/JP1994/000559

Publication Date:

October 13, 1994

Filing Date:

April 05, 1994

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Assignee:

DAIKIN IND LTD (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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