METHOD OF REGENERATION OF THE FLUORINE-CONTAINING EMULSIFIER Russian patent published in 2008 - IPC C02F1/04 

FIELD: chemical industry; methods of regeneration of the fluorine-containing emulsifiers.

SUBSTANCE: the invention is pertaining to the chemical industry and may be used for recuperation of the fluorine-containing emulsifier used in production of the fluoropolymer by the emulsive polymerization of the fluoropolymer. The method of extraction of the fluorine-containing emulsifier provides for action on the water solution containing this emulsifier in the concentration of, at least 1 share/million by the mass and maximum of 1 % by the mass, by concentration in the vacuum under the pressure of maximum 100 kPa and at the temperature maximum of 100°С with production of the concentrated water solution containing the fluorine-containing emulsifier in the higher concentration, at least of 5%by mass, and extraction of the fluorine-containing emulsifier from the indicated concentrated water solution. The technical result of the invention is the increased effectiveness of extraction of the fluorine-containing emulsifier from the water solutions with the very low initial concentration of the fluorine-containing emulsifier.

EFFECT: the invention ensures the increased effectiveness of extraction of the fluorine-containing emulsifier from the water solutions with the very low initial concentration of the fluorine-containing emulsifier.

12 cl, 3 ex