Discovery of a Novel Cationic Surfactant: Tributyltetradecyl-Phosphonium Chloride for Iron Ore Flotation: From Prediction to Experimental Verification
Discovery of a Novel Cationic Surfactant: Tributyltetradecyl-Phosphonium Chloride for Iron Ore Flotation: From Prediction to Experimental Verification
复制标题
用于铁矿石浮选的新型阳离子表面活性剂：三丁基十四烷基氯化鏻的发现：从预测到实验验证
DOI：
10.3390/min7120240
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发表时间：
2017-12-01
期刊：
影响因子：
2.5
通讯作者：
Sun, Wei
中科院分区：
文献类型：
--
作者：
Chen, Pan;Hu, Yuehua;Sun, Wei
首次将三丁基十四烷基氯化磷（TTPC）作为一种新型高效阳离子表面活性剂用于磁铁矿与石英的阳离子反浮选分离。第一性原理密度泛函理论计算、Zeta电位测量和吸附等温线测量一致地预测TTPC可能是比十二烷基三乙基氯化铵（DTAC）更好的有前途的捕收剂，这是基于TTPC和DTAC由于静电力而更喜欢物理吸附在石英表面的事实，但TTPC的活性部分（P+（C_4H_9）_3）比DTAC的活性部分（N+（CH_3）_3）带更多的正电荷。微浮选和小型浮选试验结果进一步验证了TTPC比常规捕收剂DTAC具有更强的捕收能力和更好的铁矿石反浮选选择性。此外，还对TTPC在石英表面的吸附机理进行了详细的研究。这一工作为通过合理的预测来类比已知的优良捕收剂，从而发现潜在的候选捕收剂提供了一个很好的例子。
In this work, tributyltetradecyl-phosphonium chloride (TTPC), has been first introduced to be a novel and efficient cationic surfactant for cationic reverse flotation separation of quartz from magnetite. The first-principles density functional theory calculations, Zeta potential measurements and adsorption isotherm measurements consistently predict that TTPC may be a promising collector that is better than dodecyl triethyl ammonium chloride (DTAC), based on the facts that TTPC and DTAC both prefer to physically adsorb on the quartz surface owing to electrostatic force, but the active part (P+(C4H9)3) of TTPC takes much more positive charges than that (N+(CH3)3) of DTAC. The micro-flotation and Bench-scale flotation results further verify that TTPC presents a stronger collecting power and much better selectivity for iron ore reverse flotation in comparison to the conventional collector DTAC. Furthermore, the corresponding adsorption mechanism of TTPC on the quartz have also been investigated in detail. This work might show a good example to discover a potential candidate collector by analogy with a known excellent collector based on reasonable prediction.