METHOD OF PRODUCING PERFLUORINATED CYCLONE-CONTAINING TERTIARY AMINES Russian patent published in 2019 - IPC C07C209/74 C07C211/37 

FIELD: technological processes.

SUBSTANCE: invention relates to a method of producing perfluorinated cyclic-containing tertiary amines, involving two-step fluorination of n-piperidinoheptafluorotoluene using a mixture of cobalt di- and trifluoride with 60–85 % content at the first step to obtain a mixture of perfluoro- and polyfluorinated tertiary amines. Total content of incompletely fluorinated compounds in the mixture of perfluoro- and polyfluorinated compounds after the first step does not exceed 50 g/l in terms of cleavable fluoride ion in reaction with ethylenediamine. At the second stage, fluorination is carried out with fluorine at temperature of 200–400 °C in the presence of a nickel-containing catalyst, in form of a complex salt of KNiF₃ or K₂NiF4, which reduces content of partially fluorinated impurities to trace level (less than 5 mg/l in splitting off fluoride ion in reaction with ethylenediamine).

EFFECT: high output and purity of the end product.

3 cl, 1 tbl, 6 ex