摘要
采用恒界面池法研究了高效萃取剂AD100在硫酸盐体系中萃取Cu(Ⅱ)的动力学,考察了搅拌速度、萃取温度、相界面面积、萃取剂浓度、Cu(Ⅱ)浓度对萃取速率的影响。结果表明,Cu(Ⅱ)的萃取速率随着搅拌速度的增加而加快,当搅拌速度超过110r/min后,萃取速率不再受其影响;萃取速率随着萃取温度和相界面面积的增大而增大。AD100萃取Cu(Ⅱ)的活化能为21.45kJ/mol,萃取过程受界面化学反应控制。Cu(Ⅱ)的萃取速率随AD100和Cu(Ⅱ)浓度的增大而增大。在相界面面积为20.17cm2、反应温度为20℃的条件下,AD100萃取Cu(Ⅱ)的界面反应动力学方程为:r=4.81×10-2[AD100]1.06[Cu2+]0.33。
Kinetics of Cu（]]） extracted from sulfate system by extractant AD100 was studied with a modified Lewis cell. The effects of stirring rate, temperature, interfacial area and concentration of AD100 and ini- tial Cu（II） on Cu（]]） extraction rate were investigated. The results show that the extraction rate of Cu（II） is improved with rise of stirring speed, temperature and interracial area when the stirring speed was below 110 r/rain, and remains constant when the stirring speed is above 110 r/rain. The activation energy of Cu（H） extraction by AD100 is 21.45 kJ/mol. Chemical reaction at interface is the key for extraction. The extraction rate improved with increase of concentration of AD100 in organic phase and Cu（II） in aqueous phase. The reaction kinetics equation is r= 4.81 X 10-2 [-AD100]TM [Cu2＋ ]0.33 under the conditions of tern- perature of 20 ℃ and interfacial area of 20.17 cm2.
出处
《有色金属（冶炼部分）》
CAS
北大核心
2013年第11期7-9,18,共4页
Nonferrous Metals（Extractive Metallurgy)
基金
湖北省科技计划项目(2011BCB043)
