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
Title | Year | Author | Number |
---|---|---|---|
METHOD OF PRODUCING PERFLUOROCYCLOALKANES | 2011 |
|
RU2451006C1 |
PERFLUORINATED CYCLE-CONTAINING TERTIARY AMINES AS BASE OF GAS-TRANSFERRING EMULSIONS (VARIANTS) AND METHOD FOR THEIR PREPARING | 2000 |
|
RU2263662C2 |
METHOD OF PREPARING HEXAFLUOROETHANE | 1997 |
|
RU2124493C1 |
METHOD OF PRODUCING PERFLUORO-3-METHOXYPROPIONYL FLUORIDE | 2016 |
|
RU2615148C1 |
METHOD FOR PURIFYING 1,1,1,2-TETRAFLUOROETHANE | 1992 |
|
RU2009116C1 |
METHOD OF PREPARING 1,1,1,2-TETRAFLUOROETHANE (COOLANT- 134a) | 1997 |
|
RU2132839C1 |
PERFLUORINATED ORGANIC COMPOUND PRODUCTION PROCESS | 2002 |
|
RU2221765C1 |
FLUORINATED POLYVALENT CARBONYL COMPOUND PREPARATION METHOD | 2001 |
|
RU2268876C2 |
0 |
|
SU199901A1 | |
METHOD FOR PRODUCTION OF FLUORINATED KETONE | 2001 |
|
RU2279422C2 |
Authors
Dates
2019-04-29—Published
2018-10-17—Filed