In this work are ongoing recent related studies on the separation of nitrophenols by composite membranes using this time an HFCLM membrane based on n-lower alkyl alcohols (C6, C8 si C10) on a well-characterized tubular polypropylene support . The results of nitrophenol separation, at a concentration of 5 mg / L in the source phase of pH 4.8, indicate the following optimal parameters of hydrodynamic regime, solvent and pH: source phase flow of 4.0 L / min, receiver phase rate 0.3 L / min;

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... ol, membrane solvent; the pH of the receiving phase that ensures maximum separation efficiency between 10 and 11; pH that ensures selective separation of m- and p-nitrophenols from m-nitrophenol between 8 and 10.The efficiency of nitrophenol separation through polypropylene capillary polymeric n-alcohol composite membranes reaches more than 90% at established working conditions, but operation below pH 12 will be considered in order not to cause membrane instability on the support.