Distribution of isomorphous salts between aqueous and solid phases in fractional crystallization was studied at different concentrations of less soluble salt in the ternary systems nickel-magnesium-ammonium sulfatewater and barium-lead nitrate-water systems. The applicability of theoretical equation developed by Abu Elamayem was investigated. Experimental results were explained by a proper choice of values for the parameters in Abu Elamayem's equation. These parameters characterize a given system over a wide range of concentrations and can be effectively used in predicting the amount of less soluble salt crystallizing out of a ternary system.1. nickel-magnesium-ammonium sulfate-water 2. barium-lead nitrate-water
The distribution of isomorphous salts between aqueous and solid phases infractional crystallization was determined. The results were examined from the standpoint of theoretical equations developed by Doerner and Hoskins, Berthelot and Nernst, and Abu Elamayem. Calculations of the distribution constants, X and D, employed in the Doerner and Hoskins and Berthelot and Nernst equations, respectively, show that these equations are not strictly applicable to the systems studied. Experimental results can be quantitatively explained, however, by Abu Elamayem's equation. The less soluble salt is separated more effectively by allowing a small weight fraction of the crystals to separate from a ternary system.
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