Title:
PURIFICATION OF 1,1,1-TRIFLUORO-2,2-DICHLOROETHANE FROM ISOMER 1,1,2-TRIFLUORO-1,2-DICHLOROETHANE
Document Type and Number:
Japanese Patent JP3167462
Kind Code:
B2
Abstract:
PURPOSE: To reduce or remove 1,1,2-trifluoro-1,2-dichloroethane selectively and efficiently by bringing a gaseous mixture containing specific two compounds into contact with chromium oxide at a specified temp.
CONSTITUTION: The objective 1,1,2-trifluoro-1,2-dichloroethane (A123a) is reduced or removed by bringing the mixture of A123a and 1,1,1-trifluoro-2,2- dichloroethane (A123) into contact with chromium oxide (preferably, crystalline form) supported on aluminum trifluoride at 180-400°C (preferably, 220-320°C) for a time of 1-200 sec. (preferably, 10-110 sec.).
Inventors:
Letanzio, Bragante
Paolo, Kutzato
Antonio, Maciero
Paolo, Kutzato
Antonio, Maciero
Application Number:
JP30603592A
Publication Date:
May 21, 2001
Filing Date:
October 19, 1992
Export Citation:
Assignee:
Ausimont, Sochieta, Pell, Azioni
International Classes:
C07C17/38; C07C17/389; C07C17/395; B01J23/26; C07C19/08; C07C19/12; (IPC1-7): C07C17/395; C07C19/12
Domestic Patent References:
| JP558924A | ||||
| JP2282338A |
Attorney, Agent or Firm:
Kazuo Sato (2 outside)