三元体系LiCl-Li2SO4-H2O和Li2SO4-Na2SO4-H2O 333.15 K相平衡研究

Phase Equilibria of LiCl-Li2SO4-H2O and Li2SO4-Na2SO4-H2O Ternary Systems at 333.15 K 

中文关键词:  盐湖卤水  相平衡  相图  锂盐

英文关键词:Salt lake brine  Phase equilibrium  Phase diagram  Lithium

中文摘要:

      采用等温溶解平衡法研究了三元体系LiCl-Li₂SO₄-H₂O和Li₂SO₄-Na₂SO₄-H₂O在333.15 K下的相平衡关系,测定了333.15 K条件下两个体系平衡溶液的溶解度,根据溶解度数据绘制了两个三元体系的相图。研究发现:在三元体系LiCl-Li₂SO₄-H₂O中,相图由两条单变曲线、一个不变点和两个结晶区组成,平衡固相为LiCl·H₂O和Li₂SO₄·H₂O；在三元体系Li₂SO₄-Na₂SO₄-H₂O中,相图由两个不变点、三条单变曲线和三个结晶区组成,平衡固相分别为Li₂SO₄·H₂O、Na₂SO₄和Li₂SO₄·Na₂SO₄。

英文摘要:

      The phase equilibrium relations of LiCl-Li₂SO₄-H₂O and Li₂SO₄-Na₂SO₄-H₂O ternary systems at 333.15 K were studied by isothermal solution equilibrium method.The solubility of the equilibrium solutions of LiCl-Li₂SO₄-H₂O and Li₂SO₄-Na₂SO₄-H₂O ternary systems at 333.15 K were measured.The phase diagrams of the two ternary systems were drawn according to the solubility data.It is found that in the ternary system LiCl-Li₂SO₄-H₂O,the phase diagram consists of two univariant curves,one invariant point and two crystal regions.The equilibrium solid phase is LiCl·H₂O and Li₂SO₄·H₂O.In the ternary system Li₂SO₄-Na₂SO₄-H₂O,the phase diagram consists of two invariant points,three univariant curves and three crystallization regions.The equilibrium solid phases are Li₂SO₄·Na₂SO₄,Li₂SO₄·H₂O and Na₂SO₄.