PRODUCTION OF 2,2-DICHLORO-1,1,1,2-TETRAFLUOROETHANE

PURPOSE:To obtain the subject compound on an industrial scale at a low cost by isomerizing 1,1,2-trichloro-1,2,2-trifluoroethane and reacting the resultant 1,1,1-trichloro-2,2,2-trifluoroethane with HF in the presence of a catalyst. CONSTITUTION:The objective 2,2-dichloro-1,1,1,2-tetrafluoroethane i...

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Bibliographische Detailangaben
Hauptverfasser:	MURATA KATSUYOSHI, YOSHIKAWA SATORU, YANAGII KIYOSHI, MISUMI SADAJI
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS APPARATUS THEREFOR CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY GENERAL METHODS OF ORGANIC CHEMISTRY METALLURGY ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain the subject compound on an industrial scale at a low cost by isomerizing 1,1,2-trichloro-1,2,2-trifluoroethane and reacting the resultant 1,1,1-trichloro-2,2,2-trifluoroethane with HF in the presence of a catalyst. CONSTITUTION:The objective 2,2-dichloro-1,1,1,2-tetrafluoroethane is produced by isomerizing 1,1,2-trichloro-1,2,2-trifluoroethane into 1,1,1-trichloro-2,2,2- trifluoroethane and reacting the isomerized product with hydrogen fluoride in the presence of a catalyst. The process is extremely excellent from industrial viewpoint because it can effectively decrease the content of 1,2-dichloro-1,1,2,2- tetrafluoroethane which is an isomer extremely difficult to separate. The objective compound is useful as a raw material for 1,1,1,2-tetrafluoroethane which is a refrigerant having moderate stability.