BaCl_2-C_6H_(12)O_6-H_2O/(H_2O+CH_3CH_2OH)体系在30℃时的相平衡研究

Studies on the Phase Equilibrium of BaCl_2-C_H_(12)O_6-H_2O/(H_2O and CH_3CH_2OH) at 30 ℃

用等温溶解度法研究了 Ba Cl2 -C6 H1 2 O6 -H2 O/( H2 O+CH3CH2 OH)体系在 30℃时的相平衡 ,发现在体系中有一未见文献报道的不一致溶解的化合物 Ba Cl2 · 2 C6 H1 2 O6 · 2 H2 O生成 .

The solubilities and refractive indexes of saturated solutions of the systems BaCl\-2\|C\-6H\-\{12\}O\-6\|H\-2O/(H\-2O and CH\-3CH\-2OH) have been determined at 30 ℃, and the corresponding equilibrium phase diagram and refractive index curves were constructed. The results indicated that the solubility curves and the refractive index curves of saturated solutions consist of three branches, corresponding to BaCl\-2·2H\-2O, \{BaCl\-2·2C\-6H\-\{12\}O\-6·2H\-2O\} and C\-6H\-\{12\}O\-6·H\-2O respectively, in these systems. The ternary compound BaCl\-2·2C\-6H\-\{12\}O\-6·2H\-2O which has not been reported is congruently soluble in H\-2O or in mixed solvent of H\-2O and CH\-3CH\-2OH. With the increase of the amount of ethyl alcohol in mixed solvent, the solubilities of the BaCl\-2·2H\-2O, BaCl\-2·2C\-6H\-\{12\}O\-6·2H\-2O and C\-6H\-\{12\}O\-6·H\-2O decrease gradually.