Organic compounds -- part of the class 532-570 series – Organic compounds – Halogen containing
Patent
1993-04-02
1999-02-02
Siegel, Alan
Organic compounds -- part of the class 532-570 series
Organic compounds
Halogen containing
570170, 570177, C07C 1738
Patent
active
058667300
ABSTRACT:
A process is disclosed for enriching the amount of CFC-114 relative to the amount of CFC-114a from an initial mixture containing both isomers, by contacting said initial mixture with hydrogen chloride in the vapor phase at an elevated temperature in the presence of a catalyst to produce a product mixture containing C.sub.2 Cl.sub.2 F.sub.3 and chlorination products of CCl.sub.2 FCF.sub.3 wherein the weight ratio of CClF.sub.2 CClF.sub.2 to the total C.sub.2 Cl.sub.2 F.sub.4 is higher than the weight ratio of CClF.sub.2 CClF.sub.2 to the total C.sub.2 Cl.sub.2 F.sub.4 in the initial mixture. The chlorination products of CFC-114a (e.g., CCl.sub.3 CF.sub.3) in the product mixture may then be separated from the C.sub.2 Cl.sub.2 F.sub.4 therein (e.g., by distillation).
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E. I. Du Pont de Nemours and Company
Siegel Alan
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