发明授权
- 专利标题： Process for preparing 1,1,1,2-tetrafluoroethane
- 专利标题（中）： 制备1,1,1,2-四氟乙烷的方法
-
申请号： US507644申请日： 1995-07-25
-
公开(公告)号： US5608125A公开(公告)日： 1997-03-04
- 发明人: Paolo Cuzzato , Antonio Masiero
- 申请人： Paolo Cuzzato , Antonio Masiero
- 申请人地址： ITX Milan
- 专利权人： Ausimont S.p.A.
- 当前专利权人： Ausimont S.p.A.
- 当前专利权人地址： ITX Milan
- 优先权： ITX21159/89 19890712
- 主分类号： B01J27/12
- IPC分类号： B01J27/12 ; B01J23/26 ; B01J27/125 ; C07B61/00 ; C07C17/04 ; C07C17/10 ; C07C17/20 ; C07C17/21 ; C07C19/08 ; C07C17/08
摘要：
1,1,1,2-tetrafluoroethane (134a) is prepared by reacting, in the gas phase, trichloroethylene with 1,1,1-trifluorochloroethane (133a) and hydrofluoric acid with trichloroethylene/133a molar ratios ranging from 5/95 to 50/50, in the presence of a catalyst consisting of Cr.sub.2 O.sub.3 carried on AlF.sub.3.The process provides 134a yields higher than 90% and permits an exceptionally long life of the catalyst. In this way it is possible to realize a continuous process by recycling the unreacted trichloroethylene and 133a, thereby making up for the relatively low global conversion of the reagents.
公开/授权文献
- US4602126A Two-dimensional coordinate detecting apparatus 公开/授权日：1986-07-22
信息查询
