(1. 武汉科技大学 应用化学研究所, 武汉 430081;
2. 中国矿业大学 化工学院, 徐州 221008)
摘 要: 介绍了10kg/次煤焦油溶剂萃取分离系统的流程及特点，并在此萃取分离系统中研究了对煤焦油中2~4环芳香族化合物的分离效果。结果表明： 当工业酒精与焦油质量比约为1∶1， 转速为150r/min， 每次搅拌30min， 静置30min， 进行5~6次萃取分离时， 即可将煤焦油中的1~4环化合物完全萃取， 从而得到软化点达110℃的沥青， 显示该系统具有较好的萃取分离效果；各组分在萃取相和萃余相中的浓度有很高的相关系数（r>0.95）， 符合у=a+b/x型式的双曲线方程； 该萃取体系可能为扩散控制过程。
关键字: 煤焦油； 多环芳烃； 萃取； 分离系统
（1. Institute of Applied Chemistry,
Wuhan University of Science and Technology,
Wuhan 430081, China;
2. School of Chemical Engineering,
China University of Mining and Technology,
Xuzhou 221008, China）
Abstract:The technological process and character of solvents extraction separation system of self-designed for coal tar, which can extract coal tar 10kg per pot, were introduced. The separation effectiveness of 1-4 ring aromatic hydrocarbons from coal tar was examed. The tests show that 1-4 ring aromatics can be completely extracted from coal tar by 5-6 times operation using equivalent ethanol for industrial use as extraction solvent, obtaining coal tar pitch with soften point as high as 110℃. The extraction is inferred to be the diffusion controlling process. The correlation coefficient of the concentration of the main compounds in extraction phase and residua are accorded with the hyperbola equations of y=a+b/x.
Key words: coal tar; polycyclic aromatic hydrocarbons; extraction; separation system
