Method of preparation of the sodium benzoate by catalytic oxidation of the toluene in the liquid phase

摘要

P according to the invention, benzoic acid obtained is treated hot with a small amount of amine of formula r n - h2 in which r represents hydrogen, an alkyl or cycloalkyl c1 - c4, c5 - c6, or a salt of such an amine, simultaneously or thereafter, to a distillation or a sublimation of a manner known per se, is then reacted with soda lye and is treated by extraction with toluene and / or by steam distillation of water in a manner known in the ground and / p & & p & sodium benzoate obtained according to the invention meets the requirements of the pharmacopoeiae of the main nations. / p