煤化工廢水中苯酚的絡合萃取機理及模型
發(fā)布時間:2018-10-11 18:47
【摘要】:為了探討煤化工廢水中苯酚的絡合萃取機理及模型,以TOA-煤油為絡合萃取劑對苯酚進行了絡合萃取實驗,考察了絡合劑濃度、反應溫度對萃取平衡分配系數(shù)的影響,并基于傅里葉紅外分析、液液萃取模型等,探討了絡合萃取過程的機理及建立了苯酚絡合萃取的數(shù)學模型。結果表明,提高絡合劑濃度和降低反應溫度有利于萃取平衡分配系數(shù)的增加;TOA萃取苯酚屬于氫鍵和離子締合;TOA與苯酚形成絡合物的絡合比為1∶1;TOA萃取苯酚的過程為放熱反應;TOA絡合萃取苯酚的數(shù)學模型在不同絡合萃取劑濃度下的相對誤差為4.46%,在不同溫度下的相對誤差為1.97%,對實驗過程中苯酚的分配系數(shù)的預測具有較高的可靠性。
[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.
【作者單位】: 煤炭科學技術研究院有限公司煤化工分院;煤炭資源高效開采與潔凈利用國家重點實驗室;
【基金】:國家高技術研究發(fā)展計劃(863)資助項目(2015AA050501)
【分類號】:X784
本文編號:2264869
[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.
【作者單位】: 煤炭科學技術研究院有限公司煤化工分院;煤炭資源高效開采與潔凈利用國家重點實驗室;
【基金】:國家高技術研究發(fā)展計劃(863)資助項目(2015AA050501)
【分類號】:X784
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