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Patent Searching and Data


Title:
PURIFICATION OF PENTAFLUOROETHANE
Document Type and Number:
Japanese Patent JPH08143486
Kind Code:
A
Abstract:

PURPOSE: To accomplish the purification of pentafluoroethane through efficiently removing chloropentafluoroethane as a kind of impurities in pentafluoroethane by extractive distillation of the pentafluoroethane with an inexpensive and readily available extractant.

CONSTITUTION: The objective purification of (A) pentafluoroethane is accomplished by extractive distillation of the pentafluoroethane to remove (B) chloropentafluoroethane, a kind of impurities in the component A, with an extractant selected from 1C or 2C chlorocarbons and chlorohydrocarbons (pref. selected from among dichloromethane, chloroform, carbon tetrachloride, trichloroethylene and perchloroethylene).


Inventors:
TAKAHASHI REIJI
Application Number:
JP1994000290219
Publication Date:
June 04, 1996
Filing Date:
November 24, 1994
Export Citation:
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Assignee:
SHOWA DENKO KK
International Classes:
C07C17/386; C07C19/08; (IPC1-7): C07C19/08; C07C17/386
Attorney, Agent or Firm:
Masatake Shiga (2 outside)