Title:
PRODUCTION OF 1, 1, 1, 3, 3-PENTAFLUOROPROPANE
Document Type and Number:
Japanese Patent JP3484824
Kind Code:
B2
Abstract:
PURPOSE: To readily obtain the subject compound which has been hard to industrially produce on an industrial scale by reacting difluoroethylene with dichorofluoromethane in the presence of a Lewis acid catalyst and then fluorinating the resultant product with hydrogen fluoride.
CONSTITUTION: This method for producing 1,1,1,3,3-pentafluoropropane is to initially react 1,1-difluoroethylene (hereinafter referred to as 2F) with dichlorofluoromethane (hereinafter referred to as R21) in the presence of a Lewis acid catalyst (preferably BF3, AlCl3, etc.), provide 1,2,2- trihydrodichlorotrifluoropropane and then fluorinate the resultant compound with hydrogen fluoride. The addition reaction of the F2 with R21 is preferably carried out in the liquid phase at -10 to +100°C under a slight pressure to 10kg/cm2 (gauge pressure). The fluorinating reaction is preferably conducted in the liquid phase at 20-150°C according to a continuous reactional method. Furthermore, SbF5, NbCl5, etc., are preferred as the fluorinating catalyst used for the fluorination in the liquid phase.
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Inventors:
Shinsuke Morikawa
Shuichi Okamoto
Keiichi Ohnishi
Shin Tatematsu
Shuichi Okamoto
Keiichi Ohnishi
Shin Tatematsu
Application Number:
JP14181695A
Publication Date:
January 06, 2004
Filing Date:
June 08, 1995
Export Citation:
Assignee:
Asahi Glass Co., Ltd.
International Classes:
B01J27/10; B01J27/12; B01J27/125; B01J27/128; B01J27/132; B01J27/135; C07B61/00; C07C17/20; C07C17/278; C07C19/08; C07C19/10; (IPC1-7): C07C17/20; B01J27/10; B01J27/12; B01J27/125; B01J27/128; B01J27/132; B01J27/135; C07C17/278; C07C19/08; C07C19/10
Domestic Patent References:
| JP4193841A | ||||
| JP4305542A | ||||
| JP5201892A | ||||
| JP3505454A |
Other References:
【文献】米国特許2942036(US,A)