Salt removal from process solutions in liquid dye production by nanofiltration

摘要

Nanofiltration(NF)membranes are a new class of membranes,which have properties between those of ultrafiltration(UF),and reverse osmosis(RO)membranes.Their separation mechanisms involve both steric(sieving)effects and electrical(Donnan)effects.This combination allows NF membranes to be effective for a range of separation of mixtures of organic solutes(either neutral or charged)and salts.