摘要
采用等温溶解法测定20、40和60℃条件下,Na OH-Na_2Sn O_3-Na_2Pb O_2-H_2O四元水盐体系及边界三元水盐体系Na OH-Na_2Sn O_3-H_2O、Na OH-Na_2Pb O_2-H_2O的相平衡数据.结果表明,在三元体系中,锡酸钠的溶解度随碱度的升高而降低,在高碱度条件下,40℃溶解度较高,亚铅酸钠的溶解度随温度的升高而升高,而随碱度升高呈现S形变化;在四元体系中,锡酸钠、亚铅酸钠之间相互影响,但溶解度变化趋势与三元体系一致.该研究成果可为碱、锡、铅的分离提供基础数据.
Phase equilibrium of quaternary saline system NaOH-Na2SnO3-Na2PbO2-H2O, ternary saline system NaOH-Na2SnO3-H2O and NaOH-Na2PbO2-H2O were determined by employing the method of isothermal solution saturation at 20, 40 and 60 ℃, respectively. The results show that the solubility of Na2SnO3 in ternary system decreases with increased alkalinity dosage, and the solubility at 40 ℃ is higher in solution with high alkalinity. The solubility of Na2PbO2 in ternary system increases with the increasing of the temperature, but its change with alkalinity follows an S-shape curve. In the quaternary system, interaction between Na2SnO3 and Na2PbO2 is observed. However, their solubility change the same trend with that in ternary systems. Conclusions obtained in this study can be used as basic data for the separation of NaOH, NaESnO3 and Na2PbO2.
出处
《有色金属科学与工程》
CAS
2016年第1期1-4,共4页
Nonferrous Metals Science and Engineering
基金
科技部国际合作专项(2014DFA90520)
广东省产学研项目(2013A100003)
湖南省研究生科研创新项目(CX2014B085)
关键词
锡酸钠
亚铅酸钠
碱液
相平衡
溶解度
Na2SnO3
Na2PbO2
alkali solution
phase equilibrium
solubility
