Abstract: The apparatus for the purification of organic molecules, comprising a hollow body of substantially elongated shape, open at the ends and internally defining at least one transit duct for a fluid mix, at least one functionalised permeable support housed inside the duct and having a basic permeable material to which is associated at least one chemical agent suitable for trapping, during the transit of the mix, at least one organic molecule to be purified, characterized in that the chemical agent is associated with the basic permeable material by chemical reaction between a first functional group on the molecular structure of the chemical agent and a second functional group on at least one between the molecular structure of the basic permeable material and the molecular structure of a binder associable with the basic permeable material, the first functional group and the second functional group being selected between an aminic functional group, a carboxylic functional group, a succinimidic functional group, a th