Abstract
Abstract The preparation of CF 3 COCl through reaction between CF 3 CCl 3 and SO 3 was investigated with particular reference to the following operating parameters: catalyst type and concentration, molar ratio C 2 Cl 3 F 3 /SO 3 and composition of the isomeric mixture CF 3 CCl 3 /CClF 2 CCl 2 F. Such preparation was first investigated either batchwise or semi-continuously, in order to define at best the above parameters. It was then effected continuously on proper equipment, which allowed to separate the CF 3 COCl at a degree of purity adequate to its direct use in the preparation of trifluoroacetic compounds.
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