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AssigneeBayer Intellectual Property GmbH
InventorsNorbert Lui, Shanthan Rao Pamulaparthy, Srinivas Pvss, Thomas Vijaya, Sridhar Madabhushi, Rambabu Yadla, Narsaiah Banda, Sergii Pazenok
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The invention is directed to a catalyst for the gas phase fluorination of 1,1,2-trichloroethane and/or 1,2-dichloroethene with HF to give 1-chloro-2,2-difluoroethane which catalyst is prepared by co-depositing FeCl3 and MgCl2 on chromia-alumina, or co-depositing Cr(NO3)3 and Ni(NO3)2 on active carbon, or by doping alumina with ZnCl2, and to a process for the preparation of 1-chloro-2,2-difluoroethane comprising a catalytic gas phase fluorination of 1,1,2-trichloroethane and/or 1,2-dichloroethene wherein one of the catalysts according to claim 2 or 3 is used.
A process for preparation of 1-chloro-2,2-difluoroethane comprising a catalytic gas phase fluorination of 1,1,2-trichloroethane comprising using a catalyst which is prepared by co-depositing FeCl3 and MgCl2 on chromia-alumina and which has been fluorinated by treating the catalyst with a fluorine containing activation agent at a temperature not exceeding 400° C.
A process for preparation of 1-chloro-2,2-difluoroethane comprising a catalytic gas phase fluorination of 1,2-dichloroethene comprising using a catalyst which is prepared by co-depositing FeCl3 and MgCl2 on chromia-alumina and which has been fluorinated by treating the catalyst with a fluorine containing activation agent at a temperature not exceeding 400° C.
A process for preparation of 1-chloro-2,2-difluoroethane comprising a catalytic gas phase fluorination of 1,1,2-trichloroethane and 1,2-dichloroethene, comprising using a catalyst which is prepared by co-depositing FeCl3 and MgCl2 on chromia-alumina and which has been fluorinated by treating the catalyst with a fluorine containing activation agent at a temperature not exceeding 400° C. and wherein 1,1,2-trichloroethane and 1,2-dichloroethene are fed separately to a reactor.
Dependencies are inferred from the claim text.