论文部分内容阅读
研究了在饱和氯化镁盐湖卤水中，锂与各种络合阴离子的共萃取效应，结果表明，以ＦｅＣｌ３最佳。对锂与铁络合阴离子共萃取相关因素──总Ｃｌ－浓度、酸度、Ｆｅ／Ｌｉ进行了讨论，保持原始水相ＦｅＣｌ３不致水解的最低酸度和高Ｃｌ－浓度，ＦｅＣｌ３与Ｃｌ－形成铁络阴离子，与Ｌｉ＋以ＬｉＦｅＣｌ４络合物形式共萃取进入有机相。化学法分析平衡有机相组成表明，所有阳离子摩尔浓度的总值与Ｆｅ３＋摩尔浓度相等，而Ｃｌ－摩尔浓度与Ｆｅ３＋摩尔浓度比值为４，证明了以络酸ＨｆｅＣｌ４和络酸盐Ｍｅ（ＦｅＣ１４）ｎ（ｎ为金属阳离子价数）的共萃取机理。
The co-extraction effect of lithium with various complex anions in saturated brine of magnesium chloride lake was studied. The results showed that FeCl3 was the best. The factors related to co-extraction of lithium and iron complex anions ------ the total Cl- concentration, acidity, Fe / Li were discussed, the lowest acidity and high Cl- concentration of the original water phase FeCl3 were not hydrolyzed, the formation of FeCl3 and Cl- Anions, co-extracted with Li + in the form of LiFeCl 4 complex, enter the organic phase. Chemical analysis of the equilibrium organic phase composition showed that the total molar concentration of all the cations was equal to the molar concentration of Fe3 + and the molar ratio of Cl-molar concentration to Fe3 + molar concentration was 4. It was demonstrated that HfeCl4 and the complex acid salt Me (FeC14) n (N is the valence of the metal cation) co-extraction mechanism.