IMPROVED METHOD FOR OBTAINING LITHIUM SALTS OF OXYBENZOIC ACIDS AND THEIR CARBOXYLATED AMIDES

摘要

FIELD: chemistry.SUBSTANCE: invention relates to improved method for obtaining lithium salts of carboxylated amines of hydroxybenzoic acids, applied in production of medications and other organic products. Method consists in interaction of carboxylated amines of hydroxybenzoic acids with lithium hydroxide, with the process being carried out in medium of boiling benzene with azeotropic distillation of water for 1.0-1.5 h. Final product is extracted by filtration and washing by solvent.EFFECT: method makes it possible to obtain lithium salt with content of basic substance not less than 99,0 wt % and output not less than 96%.4 ex