煤化工废水中苯酚的络合萃取机理及模型

发布时间：2018-10-11 18:47

【摘要】：为了探讨煤化工废水中苯酚的络合萃取机理及模型,以TOA-煤油为络合萃取剂对苯酚进行了络合萃取实验,考察了络合剂浓度、反应温度对萃取平衡分配系数的影响,并基于傅里叶红外分析、液液萃取模型等,探讨了络合萃取过程的机理及建立了苯酚络合萃取的数学模型。结果表明,提高络合剂浓度和降低反应温度有利于萃取平衡分配系数的增加;TOA萃取苯酚属于氢键和离子缔合;TOA与苯酚形成络合物的络合比为1∶1;TOA萃取苯酚的过程为放热反应;TOA络合萃取苯酚的数学模型在不同络合萃取剂浓度下的相对误差为4.46%,在不同温度下的相对误差为1.97%,对实验过程中苯酚的分配系数的预测具有较高的可靠性。
[Abstract]:In order to study the mechanism and model of phenol complexation extraction in coal chemical wastewater, the complexation extraction experiments of phenol were carried out with TOA- kerosene as complexing extractant. The effects of complexing agent concentration and reaction temperature on extraction equilibrium partition coefficient were investigated. Based on Fourier transform infrared analysis (FTIR) and liquid-liquid extraction model, the mechanism of complexation extraction and the mathematical model of phenol complexation extraction were discussed. The results show that Increasing the concentration of complex agent and lowering reaction temperature are beneficial to the increase of equilibrium partition coefficient of extraction; TOA extraction of phenol belongs to hydrogen bond and ion association; the complex ratio of TOA to phenol is 1: 1TOA and the process of extracting phenol is exothermic reverse. The relative error of TOA complex extraction model for phenol is 4.46 at different concentration of complexing extractant and 1.97 at different temperature. It is reliable to predict the distribution coefficient of phenol in the experiment.
【作者单位】：煤炭科学技术研究院有限公司煤化工分院;煤炭资源高效开采与洁净利用国家重点实验室;
【基金】：国家高技术研究发展计划(863)资助项目(2015AA050501)
【分类号】：X784

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