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Preparation of high concentration polyaluminum chloride with high content of Al-b or Al-c

机译：高含量Al-b或Al-c的高浓度聚氯化铝的制备

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A novel membrane distillation concentration method was used to prepare high concentration polyaluminum chloride (PACT) with high content of Al-b or Al-c. 2.52 mol/L PACl(1) with 88% Alb and 2.38 mol/L PACl(2) with 61% Al-c were successfully prepared. Three coagulants, AICl(3), PACl(1) and PACl(2) were investigated on their hydrolysis behavior and speciation under different conditions. The effects of pH and dilution ratio on Al species distribution were investigated by ferron assay. Experimental result showed that pH had a significant effect on Al species distribution for the three coagulants. Dilution ratio had little effects on Alb and Al, distribution in whole dilution process except the beginning for PACl(1) and PACl(2). The results indicated that transformation of Al depends largely on their original composition. AICl(3) was the most unstable coagulant among these three coagulants during hydrolysis process. PACl(1) and PACl(2) with significant amounts of highly charged and stable polynuclear aluminum hydrolysis products were less affected by the hydrolysis conditions and could maintain high speciation stability under various conditions.
机译：一种新颖的膜蒸馏浓缩方法被用于制备高浓度的Al-b或Al-c的高浓度聚氯化铝（PACT）。成功制备了含88％Alb的2.52 mol / L PACl（1）和含61％Al-c的2.38 mol / L PACl（2）。研究了三种混凝剂AICl（3），PACl（1）和PACl（2）在不同条件下的水解行为和形态。用ferron法研究了pH和稀释比对Al分布的影响。实验结果表明，pH值对三种混凝剂的Al种类分布具有显着影响。稀释比对Alb和Al的影响很小，除了PACl（1）和PACl（2）的开始以外，在整个稀释过程中的分布都没有。结果表明，Al的转化很大程度上取决于其原始组成。在水解过程中，AICl（3）是这三种凝结剂中最不稳定的凝结剂。具有大量高电荷和稳定的多核铝水解产物的PACl（1）和PACl（2）受水解条件的影响较小，并且可以在各种条件下保持较高的形态稳定性。

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