The subject of the present invention is a method for separating a carboxylic acid in salified form bearing at least one halogen atom at the α position of the carbonyl group from a medium comprising it. The method according to the invention, for separating a carboxylic acid in salified form bearing at least one halogen atom at the α position of the carbonyl group from an aqueous medium comprising it, is characterized by the fact that the latter is brought into contact with an onium salt leading to the formation of two phases: an organic phase comprising the salt resulting from the reaction of the salt of the carboxylic acid bearing at least one halogen atom at the α position of the carbonyl group and of the onium salt leading to the displacement of the cation from the carboxylic acid by the onium, an aqueous phase comprising the various salts, in particular the one resulting from the reaction of the cation of the carboxylic acid with the anion of the onium, and by the fact that the organic and aqueous phases are then separated and that the onium salt of the carboxylic acid is recovered from the organic phase.
本发明的主题是一种从含有至少一个卤素原子的
羧酸盐形式中分离α位于羰基团上的
羧酸的方法。本发明的方法用于从含有至少一个卤素原子的
羧酸盐形式中分离α位于羰基团上的
羧酸,其特征在于将其与导致形成两个相的离子盐接触,其中有机相包括由
羧酸盐的盐和离子盐反应产生的盐,该离子盐通过离子盐的阳离子取代
羧酸的阳离子而形成;
水相包括各种盐,特别是由
羧酸的阳离子与离子盐的阴离子反应而形成的盐。然后分离有机相和
水相,并从有机相中回收
羧酸的离子盐。