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采用等温蒸发法研究了五元体系Li+,K+//CO32-,SO24-,B4O72--H2O在288K时的介稳相平衡关系,测定了该五元体系在288K条件下的介稳平衡的溶解度和溶液密度,根据实验数据绘制了相应的介稳平衡相图和水图.相平衡研究结果表明该五元体系介稳相平衡中有复盐K2SO4·Li2SO4生成,其介稳相图(Li2CO3饱和)有4个共饱和点,9条单变量曲线,6个Li2CO3饱和的结晶区分别为LiBO2·8H2O,K2B4O7·4H2O,K2CO3·3/2H2O,K2SO4,Li2SO4·H2O和复盐K2SO4·Li2SO4.
The isothermal evaporation method was used to study the metastable phase equilibrium of the quinary system Li +, K + // CO32-, SO24-, B4O72 - H2O at 288K. The metastable equilibrium of the quinary system at 288K was measured. And solution density, the corresponding metastable phase diagram and water diagram are plotted based on the experimental data.The phase equilibrium study shows that the quaternary complex system has complex salt K2SO4 · Li2SO4 formation and the metastable phase diagram (Li2CO3 saturation ) Has four total saturation points and nine univariate curves. The six saturated crystalline regions of Li2CO3 are LiBO2.8H2O, K2B4O7.4H2O, K2CO3.3H2O, K2SO4, Li2SO4 H2O and double salt K2SO4 Li2SO4, respectively.