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研究了有机溶剂萃取净化湿法磷酸时,杂质离子浓度对磷酸萃取相平衡的影响.结果表明:磷酸的萃取率随初始水相中钙离子、镁离子、硫酸根离子、氯化钠浓度的增大而逐步增大,随铁离子浓度增大而减小.水相中有机物浓度随钙镁离子浓度的增大而降低,随铁离子、硫酸根离子浓度增大呈先增大后减小的变化趋势.
The effect of impurity ion concentration on the phase equilibrium of phosphoric acid extraction was studied when organic solvent extraction was used to purify wet-process phosphoric acid.The results showed that the extraction rate of phosphoric acid increased with the concentration of calcium ion, magnesium ion, sulfate ion and sodium chloride in the initial aqueous phase Large and gradually increased with the increase of iron concentration decreases.The concentration of organic matter in the aqueous phase decreases with the increase of the concentration of calcium and magnesium ions.With the concentration of iron and sulfate ions increases first and then decreases Trend.