三烷基胺反应萃取烟酸的研究

Chinese Journal of Chemical Engineering ›› 2012, Vol. 20 ›› Issue (5): 843-848.

三烷基胺反应萃取烟酸的研究

李德亮, 于飞, 常志显

Institute of Environmental and Analytical Sciences, College of Chemistry and Chemical Engineering, Henan Uni-versity, Kaifeng 475004, China

收稿日期:2011-03-22 修回日期:2011-09-15 出版日期:2012-10-28 发布日期:2011-09-15

Reactive extraction of nicotinic acid with trialkylamine in n-octanol

LI Deliang; YU Fei; CHANG Zhixian

Institute of Environmental and Analytical Sciences, College of Chemistry and Chemical Engineering, Henan Uni-versity, Kaifeng 475004, China

Received:2011-03-22 Revised:2011-09-15 Online:2012-10-28 Published:2011-09-15

摘要/Abstract

摘要： The distributions of nicotinic acid (NA) between water and trialkylamine (N235) dissolved in n-octanol was studied. The complexes of N235 and NA were investigated by Fourier transformation infrared spectrometry to deduce the reaction mechanism. It was found that N235/n-octanol was an efficient extractant for extracting nicotinic acid. The favorable operation conditions were equilibrium aqueous pH 4.2 to 5.5 and initial N235 concentration<0.42 mol•L?1. The reaction processes included the reaction between neutral N235 and neutral NA and the reaction between protonated N235 and anionic NA. Based on the mass action law and some assumptions, an expression for distribution coefficient D was proposed. The apparent extraction equilibrium constants were calculated by fitting the experimental data and the results were satisfactory.

关键词: nicotinic acid, reactive extraction, trialkylamine, proton-transfer

Abstract: The distributions of nicotinic acid (NA) between water and trialkylamine (N235) dissolved in n-octanol was studied. The complexes of N235 and NA were investigated by Fourier transformation infrared spectrometry to deduce the reaction mechanism. It was found that N235/n-octanol was an efficient extractant for extracting nicotinic acid. The favorable operation conditions were equilibrium aqueous pH 4.2 to 5.5 and initial N235 concentration<0.42 mol•L?1. The reaction processes included the reaction between neutral N235 and neutral NA and the reaction between protonated N235 and anionic NA. Based on the mass action law and some assumptions, an expression for distribution coefficient D was proposed. The apparent extraction equilibrium constants were calculated by fitting the experimental data and the results were satisfactory.

Key words: nicotinic acid, reactive extraction, trialkylamine, proton-transfer

李德亮, 于飞, 常志显. 三烷基胺反应萃取烟酸的研究[J]. Chinese Journal of Chemical Engineering, 2012, 20(5): 843-848.

LI Deliang, YU Fei, CHANG Zhixian. Reactive extraction of nicotinic acid with trialkylamine in n-octanol[J]. Chin.J.Chem.Eng., 2012, 20(5): 843-848.

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[2]	LI Deliang(李德亮), LIU Xiaoqiang(刘小强) and CUI Jiehu(崔节虎). Reactive Extraction of o-Aminophenol Using Trialkylphosphine Oxide[J]. CIESC Journal, 2006, 14(1): 46-50.
[3]	秦炜, 李振宇, 汪敏, 戴猷元. 三烷基胺萃取氨基磺酸及其废水的特性研究[J]. CIESC Journal, 2004, 12(1): 137-142.