The adsorption of aniline

N-methylaniline and N

N-dimethylaniline onto carboxyl resin in Cu2+ form from water

ethanol and n-hexane have been studied. The results show that the adsorption affinities from n-hexane are higher than thatfrom water

and nearly zero from ethanol. The separation factors for the adsorption of these three amines from mixed solutionwere also examined. The results of continuous column operations show that the breakthrough capacity of aniline from n-hexane reaches 90 mg/g dry resin in Cu2+ form

and the amines adsorbed can be stripped with anhydrous ethanol effectively.Adsorption onto carboxyl resin in Cu2+ form from non-aqueous medium and desorption with anhydrous eluant can overcome the run-off of Cu2+ from the resin

and would show potential advantages in the separation of some water-insoluble natural products.