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用改进的半微量相平衡方法研究了Dy(NO_3)_3·3H_2O—B15C5一C_2H_5OH三元体系在18℃时的溶解度,测定了该体系在18℃各饱和溶液的折光率。结果表明,该体系中只有一种化学计量为Dy(NO_3)8·B15C5·3H_2O·2.5C_2H_5OH的配合物生成,配合物与冠醚B15C5的共饱和点组成为:Dy(NO_3)_3·3H_2O 19.04％;B15C5 28.42％;C_2H_5OH 52.54％.考查了相平衡过程中水的行为。经分离、洗涤及浓硫酸干燥恒重后,配合物的组成变为:Dy(NO_3)_3·B15C5·3H_2O·0.65C_2H_5OH.通过化学分析、紫外与红外光谱分析、DTG,TG及DSC研究了配合物的组成和性质。测定了配合物的脱溶剂、热分解过程的热效应。在常量情况下,考查了配合物的热失重情况。
The solubility of Dy (NO_3) _3 · 3H_2O-B15C5-C_2H_5OH ternary system at 18 ℃ was studied by a modified semi-micro phase-equilibria method. The refractive index of the saturated solution at 18 ℃ was measured. The results show that there is only one stoichiometric Dy (NO_3) 8 · B15C5 · 3H_2O · 2.5C_2H_5OH complex in this system. The total saturation point of the complex with crown ether B15C5 is Dy (NO_3) _3 · 3H_2O 19.04 %; B15C5 28.42%; C_2H_5OH 52.54%. The behavior of water during phase equilibrium was examined. After separation, washing and constant weight drying with concentrated sulfuric acid, the composition of the complex changed as follows: Dy (NO_3) _3 · B15C5 · 3H_2O · 0.65C_2H_5OH. Chemical analysis, UV and IR spectra, DTG, TG and DSC The composition and nature of things. The thermal effect of thermal decomposition of the complex was determined. Under constant conditions, the thermal weight loss of the complex was examined.