文献类型：期刊文献

中文题名：含髙浓度羟基乙酸溶液的络合萃取分离

英文题名：Reactive Extraction of Glycolic Acid in High Content Solution with Tri-n-octylamine

作者：孙后勇[1];施云海[1];曹海甬[1];徐学林[1]

机构：[1]华东理工大学化学工程研究所,上海200237

年份：2007

卷号：21

期号：1

起止页码：26

中文期刊名：高校化学工程学报

外文期刊名：Journal of Chemical Engineering of Chinese Universities

收录：CSTPCD;;EI(收录号：20071610557438);Scopus;北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

基金：上海石油化工股分有限公司资源共享资助项目(22J-02-558;06J-05-002)

语种：中文

中文关键词：羟基乙酸;络合萃取;羟基乙腈水解液;三辛胺

外文关键词：glycolic acid; reactive extraction; hydrolysate ofglycolonitrile; tri-n-octylamine

摘要：针对含2．5～5．0mol·L^-1羟基乙酸的羟基乙腈硫酸法水解液，采用三辛胺（TOA）、正辛醇和磺化煤油组成的萃取剂，在单级液-液萃取装置中通过实验考察了TOA体积百分数、油水两相体积比、萃取温度等条件对羟基乙酸在油水两相中分配系数的影响，并测定了该系统在25℃下的相平衡数据。红外光谱图分析结果表明：TOA对羟基乙酸络合萃取同时存在氢键缔合和离子缔合两种方式。基于质量作用定律，建立了表达该萃取过程的相平衡模型，对25℃的萃取平衡数据进行关联，结果表明油相中羟基乙酸浓度的实验值与模型计算值吻合良好。
The hydrolysate containing glycolic acid of 2.5-5.0mol·L^-1 was obtained from glycolonitrile hydrolyzation with sulfuric acid. A complex solvent, which was composed of tri-n-octylamine （TOA）, n-octane and sulfated kerosene, was used to separate glycolic acid from the hydrolysate. In a single-stage equilibrium apparatus, the influences of volume ratio of TOA in the complex solvent, extraction temperature and the volume ratio of organic phase to water phase on the distribution coefficients of glycolic acid between the organic and water phases were investigated, and the liquid-liquid equilibrium data at 25℃ were also obtained. The samples loaded with different content of glycolic acid were analyzed by infrared spectrometer. It is validated that the amine：acid complexes are formed by both hydrogen bonding and ionization. A mathematical model based on mass balance was developed to describe the equilibrium of the reactive extraction, and was used to correlate the experimental equilibrium data at 25℃. The results show that the calculated concentrations of glycolic acid in the organic phase consist well with the experimental data.