发明授权
- 专利标题： Process for the preparation of 1,1,1,2-tetrafluoroethane
- 专利标题（中）： 1,1,1,2-四氟乙烷的制备方法
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申请号： US11643767申请日： 2006-12-22
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公开(公告)号： US07982074B2公开(公告)日： 2011-07-19
- 发明人: Jampani Madhusudana Rao , Shanthan Pamulaparthy Rao , Siva Attaluri Prasad , Banda Narasaiah , Narayan Sripathi Reddy , Radhakrishnan Kuppusamy , Vijayakumar Veeramachaneni , Patil Kamalakar Sukhadeorao , Rambabu Yadla , Koosampally Srinivas , Leelakrishna Kondaveti
- 申请人： Jampani Madhusudana Rao , Shanthan Pamulaparthy Rao , Siva Attaluri Prasad , Banda Narasaiah , Narayan Sripathi Reddy , Radhakrishnan Kuppusamy , Vijayakumar Veeramachaneni , Patil Kamalakar Sukhadeorao , Rambabu Yadla , Koosampally Srinivas , Leelakrishna Kondaveti
- 申请人地址： IN Andhra Pradesh
- 专利权人： Council of Scientific & Industrial Research
- 当前专利权人： Council of Scientific & Industrial Research
- 当前专利权人地址： IN Andhra Pradesh
- 代理机构： Sughrue Mion, PLLC
- 主分类号： C07C19/08
- IPC分类号： C07C19/08 ; C07C17/21 ; C07C17/20
摘要：
The present invention relates to a process for preparing a co-precipitated Cr2O3/Al2O3 catalyst promoted by Zinc, said process comprising co-precipatation of chromium and aluminum metal hydroxides from corresponding trivalent metal salt solutions using NH4OH, NaOH or KOH as a base and followed by calcination to give mixed oxide precatalyst in amorphous from which is impregnated with an activity promoting amount of Zinc compound. The catalyst is used for the preparation of HFC-134a by fluorination of trichloroethylene and fluorination of intermediate of the former reaction (HCFC-133a).
公开/授权文献
- US20070106100A1 Process for the preparation of 1,1,1,2-tetrafluoroethane 公开/授权日：2007-05-10
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