The distribution of acid, water, methanol, ethanol and acetone between mixed aqueous-organic nitric acid solutions and solutions
of trilaurylammoniumnitrate in cyclohexane has been investigated. The distribution of acid rises with increasing concentrations
of nitric acid, methanol, ethanol and acetone in the mixed aqueous-organic phase. The effect of the organic additives in increasing
the distribution of the acid is methanol<ethanol<acetone. The concentration of nitric acid in the organic phase can be calculated
by a formula similar to that describing the extraction from pure aqueous solutions. The distribution curves of water, methanol
and ethanol resemble each other, all of them showing a minimum, when the distribution ration is plotted versus the nitric
acid concentration in the mixed aqueous-organic phase. The acetone distribution decreases steadily with increasing nitric
acid concentration. The shape of the curves is briefly discussed.