METHOD FOR SEPARATING SALIFIED PHENOLIC COMPOUNDS

摘要

A method for separating a salified phenolic compound from a reaction medium including same is described. Also described, is a method for separating salified phenolic compounds from an aqueous reaction medium resulting from the reaction of a phenolic compound and glyoxylic acid in the presence of a base, which leads to a reaction medium including at least the excess of the starting salified phenolic compound and the various salified mandelic compounds resulting from the reaction, wherein the reaction medium including the starting salified phenolic compound is contacted with an adsorbent substrate. This leads to the selective adsorption of the phenolic compound onto said substrate and to the recovery of an aqueous flow containing the salified mandelic compounds from the reaction, and in that the phenolic compound attached onto the adsorbent is desorbed by means of a regenerating treatment of the adsorbent.

主权项

1. A method of separating phenolic compounds, the method comprising separating the phenolic compounds in salified form from an aqueous reaction mixture resulting from a reaction of a phenolic compound and glyoxylic acid in the presence of a base, leading to a reaction mixture comprising at least an excess of phenolic starting compound in salified form and various mandelic compounds in salified form, resulting from the reaction, wherein the reaction mixture comprising the phenolic starting compound in salified form is contacted with an adsorbent support, leading to selective adsorption of said phenolic compound on said support, and to recovery of an aqueous stream comprising the mandelic compounds in salified form obtained from the reaction, and in that the phenolic compound fixed on the adsorbent is desorbed by a regenerative treatment of said adsorbent.