METHOD OF PURIFYING FLUORINATED COMPOUND Russian patent published in 2014 - IPC C07C51/44 C07C59/135 C07C69/708 C07C67/54 C08F2/26 C08F14/00 

FIELD: chemistry.

SUBSTANCE: invention relates to efficient method of purifying fluorinated compound, which includes distillation of liquid, which contains, at least, one member, selected from group, consisting of fluorinated compound, represented by the following formula (1), and fluorinated compound, represented by the following formula (2), keeping it at temperature of heating not higher than 150°C, where temperature of heating is internal temperature of distillation column boiler: R^FOR¹COOH, (1), R^FOR¹COOR², (2) in which R^F represents fluorinated alkyl group, which can have simple ether atom of oxygen in its main chain, R¹ represents perfluoroalkylene group, and R² represents C₁-C₃alkyl group, and in which liquid represents liquid obtained from any liquid waste product after coagulation of fluoropolymer water emulsion and separation of fluoropolymer, water liquid, obtained by washing of discharge gas at the stage of drying and/or stage of thermal processing of a separate fluoropolymer, or liquid, obtained by washing with alkali water solution of anion-exchange resin, which was brought in contact with liquid waste product or water dispersion, obtained from fluoropolymer water emulsion.

EFFECT: increased efficiency of purification.

6 cl, 5 ex