摘要
研究了复合萃取剂-磷酸-水三元体系在25℃下的液液相平衡关系,绘制了三角相图,用Hand公式对相平衡数据进行了关联。考察了不同温度条件下磷酸分配系数随原料酸中磷酸含量的变化关系,结果表明磷酸的分配系数随温度变化不大;同时,研究了磷酸中钙镁离子在两相中的分配情况,结果表明复合萃取剂对离子具有很好的选择性。
The liquid-liquid equilibrium of composite extractant-phosphoric acid-water was researched at 25℃ ,and the triangular phase diagram was drawed. Then data association was performed by Hand formula. The relationship between the partition coefficient of phosphoric acid and phosphoric acid content was investigated at different temperature. The results indicated that the partition coefficient of phosphoric acid had no obvious change when the temperature changed. Additional, the distribution conditions of Ca^2＋ , Mg^2＋ ions in diphase were studied,the result showed that the composite extractant had high selectivity for the ions.
出处
《化学与生物工程》
CAS
2010年第1期16-18,共3页
Chemistry & Bioengineering
基金
国家科技支撑项目(2007BAB08B09)
关键词
液液相平衡
萃取剂
磷酸
分配系数
liquid-liquid equilibrium
extractant
phosphoric acid
partition coefficient
