Process to separate useful compounds, such as quinoline, indole, derived from coal using solvent extraction or liquid membrane method

采用溶剂萃取法和液膜法对煤焦油馏分中的吸附油和焦油轻质油进行粗分离。在溶剂萃取法的研究中，进行了进料混合物(吸附油/焦油轻质油)与溶剂(甲醇水溶液)的液液平衡关系的实验测定、萃取剂与萃取液中溶剂组分的分离、基于实验结果的逆流多级接触萃取计算等。结果表明，含氮杂环化合物的提取效果优于原料混合物中的其他化合物。富含氮化物的萃取剂可以通过二次溶剂萃取和萃取后的萃取物中的蒸馏分离出来，回收溶剂组分，这些原料可以分离成符合实际操作条件的产品等。在液膜法的研究中，对原料与膜液(水)和溶剂(几种烃)与膜液之间的液液平衡进行了实验测量，并通过支撑液膜和乳化液膜进行了间歇渗透。由于含氮化合物在进料中的分配系数强烈依赖于碳氢化合物溶剂的种类，因此可以预测，使用含氮化合物分配系数较低的溶剂可以改善含氮化合物的分离性能。支撑液膜和乳状液膜的渗透实验证实了这一预测。

Solvent extraction and liquid membrane methods were applied to the raw separation of adsorption oil and tar light oil as coal tar distillates.In the study of the solvent extraction method, experimental measurement of liquid-liquid equilibrium relationship between feed mixture (adsorption oil/tar light oil) and solvent (aqueous methanol solution), separation between extractant and solvent components in the extract after extraction, calculation of extraction with countercurrent multistage contact based on the obtained experimental results, and so on, were carried out. The results showed that nitrogen heterocyclic compounds could be extracted preferentially to the other compounds contained in the feed mixture. Extractant rich in nitrogen compounds could be separated by both extraction with secondary solvent and distillation from the extract after extraction to recover the solvent components, these feeds could be separated into the products wife practical operation conditions, and so forth.In the study of the liquid membrane method, experimental measurement of liquid-liquid equilibria between feed and membrane liquid (water) and between solvent (several kinds of hydrocarbon) and membrane liquid, batch permeation through supported and emulsion liquid membrane were conducted. Since the distribution coefficients of nitrogen compounds in feeds were strongly dependent on the kind of hydrocarbon solvent, it was predicted that the separation performance for nitrogen compounds could be improved by the use of the solvent in which the distribution coefficient of nitrogen compounds were low. This prediction was confirmed by the permeation experiments with supported and emulsion liquid membrane.