Process for the removal and recovery of phenolic compounds from aqueous fluids.

摘要

Process for removing and recovering one or more phenolic compounds undissociated in aqueous liquid, said method comprising the following steps: (a) transfer one or more phenolic compounds from the aqueous fluid (1) to an alkaline stripping solution (3) wherein the transfer of one or more undissociated phenolic compounds from the aqueous fluid (1) to the alkaline stripping solution (3) occurs across a membrane (5); wherein the membrane (5) is a nonporous permselective membrane; (B) regulating the volume used of alkaline stripping solution (3) on the treated aqueous liquid (1) volume, so that the total phenolic compound concentration in the alkaline stripping solution (4) comprising the sum of concentrations of dissociated phenolic compounds and undissociated, is greater than the solubility of the phenolic compounds in the solution acidified stripping step (d); (c) regulating the pH of the alkaline stripping solution (3) in contact with the membrane (5) to a value of at least 0, 5 pH units above the acidic dissociation constant of the phenolic compound; (D) adjusting the pH of the alkaline stripping solution (4) containing phenolic compound to lower the acid dissociation constant of the phenolic compound and value; (E) separating the resulting phase rich in phenolic compounds (11) of the solution acidified reextraction (12).