Phase equilibrium of the ternary system of NH 4 Cl—CaCl 2 —H 2 O at 50°C

Abstract

The equilibrium data on the ternary system of NH₄Cl—CaCl₂—H₂O at 50°C were investigated using the wet-residue method. The experimental results show that there are three pure phase crystal areas of NH₄Cl, 2NH₄Cl·CaCl₂·3H₂O and CaCl·2H₂O, two mixture phase crystal areas of NH₄Cl and 2NH₄Cl·CaCl·3H₂O, and 2NH₄Cl·CaCl₂·3H₂O and CaCl·2H₂O in the system. A new hydration double salt (2NH₄Cl·CaCl·3H₂O) was found in the ternary equilibrium system for the first time.