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Kinetic models for the extraction of copper by Acorga M5640 after leaching of malachite ore in perchloric acid solutions and the stripping of copper from loaded organic phase
Brazilian Journal of Chemical Engineering ( IF 1.2 ) Pub Date : 2020-05-21 , DOI: 10.1007/s43153-020-00032-y
Mehmet Kayra Tanaydın , Nizamettin Demirkıran

In the present work, the extraction kinetics of copper using the resulting actual leach solution obtained from the leaching of malachite ore in perchloric acid solutions and the stripping kinetics of copper from the loaded organic phase were examined. The organic phase was prepared by using Acorga M5640 and kerosene. In the extraction process, the effects of the initial pH of aqueous solution, initial concentration of copper, extractant concentration, temperature, and stirring speed on the extraction rate were investigated. In the stripping process, the effects of the concentration of perchloric acid, temperature, stirring speed, and extractant concentration on the stripping rate were examined. It was determined that the extraction rate increased with increasing the initial pH of aqueous solution, stirring speed, extractant concentration and temperature, and with decreasing the initial concentration of copper ions. In the stripping process, it was observed that the stripping rate increased with increasing the concentration of perchloric acid, temperature and stirring speed, and with decreasing the extractant concentration. It was determined that both the solvent extraction and stripping processes could be described by the first order pseudo homogenous reaction model. The activation energy for the extraction and stripping processes was calculated to be 50.04 kJ/mol and 32.42 kJ/mol, respectively.

中文翻译:

在高氯酸溶液中浸出孔雀石矿石并从负载的有机相中剥离铜后,Acorga M5640 提取铜的动力学模型

在目前的工作中,使用从高氯酸溶液中浸出孔雀石矿石获得的实际浸出溶液来检测铜的提取动力学,以及从负载的有机相中提取铜的动力学。有机相使用 Acorga M5640 和煤油制备。在萃取过程中,考察了水溶液的初始pH值、铜的初始浓度、萃取剂浓度、温度和搅拌速度对萃取率的影响。在汽提过程中,考察了高氯酸浓度、温度、搅拌速度、萃取剂浓度对汽提速率的影响。确定提取率随着水溶液初始 pH 值、搅拌速度、萃取剂浓度和温度,以及铜离子初始浓度的降低。在汽提过程中,观察到汽提速率随着高氯酸浓度、温度和搅拌速度的增加以及萃取剂浓度的降低而增加。确定溶剂萃取和汽提过程都可以用一级拟均相反应模型来描述。经计算,萃取和汽提过程的活化能分别为 50.04 kJ/mol 和 32.42 kJ/mol。并且随着萃取剂浓度的降低。确定溶剂萃取和汽提过程都可以用一级拟均相反应模型来描述。经计算,萃取和汽提过程的活化能分别为 50.04 kJ/mol 和 32.42 kJ/mol。并且随着萃取剂浓度的降低。确定溶剂萃取和汽提过程都可以用一级拟均相反应模型来描述。经计算,萃取和汽提过程的活化能分别为 50.04 kJ/mol 和 32.42 kJ/mol。
更新日期:2020-05-21
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