METHODS OF OBTAINING FLUORINATED CARBOXYLIC ACIDS AND THEIR SALTS Russian patent published in 2015 - IPC C07C51/27 C07C53/18 C07C53/21 C07C51/275 C07C51/29 C07C59/135 C25B3/02 

FIELD: chemistry.

SUBSTANCE: invention relates to an improved method of obtaining fluorinated carboxylic acids and their salts, consisting of the reaction of fluorine-containing alcohols with the general formula (A):A-CH₂-OH, with as minimum one first and as minimum one second oxidiser in order to obtain fluorinated carboxylic acid or its salts with the general formula (B): A-COO^-M⁺, where M⁺ represents a cation and where "A" in formulas (A) and (B) represents a similar fragment, representing a residue: Rf-[0]_p-CX"Y"-[0]_m-CX'Y'-[0]_n-CXY-, where Rf is a fluorinated alkyl residue, which might contain, and might not contain one or several catenary atoms of oxygen, p, m and n are independent on each other or 1, or 0; X, X', X", Y, Y' and Y" are independent on each other H, F, CF₃, or C₂F₅, on condition that at least one of the values X and Y represents F, CF₃, or C₂F₅; or A represents a residue: R-CFX-, where X and R are independently selected from hydrogen, halogen or alkyl, alkenyl, cycloalkyl or aryl residues, which might contain, and might not contain one or several fluorine atoms, which might have and might not have one or several catenary atoms of oxygen, where the first oxidiser represents a compound, which has groups, selected from N-oxyls, P-oxyls-, alpha-halocarbonyls, ketones, imines, iminium salts and their combinations; and the second oxidiser is selected from electric current of a galvanic element, peroxide, oxides of halogens, chlorine, oxygen, ozone, salts of nitrous acid or their combinations.

EFFECT: effective method makes it possible to use an easily available raw material.

14 cl, 22 ex