从洗油中分离喹啉的新方法

New method of separating quinoline from wash oil

以洗油为原料，通过精馏-共沸精馏法，研究了喹啉的分离精制。首先精馏洗油，切取不同温度段的馏分，然后分别与共沸剂乙二醇进行共沸精馏试验；在共沸精馏中，通过改变馏分与共沸剂的质量比和回流比，考察了不同条件对喹啉纯度的影响。结果表明：①精馏洗油切取喹啉馏分的较佳条件为：回流比为10：1，切取温度范围为220～230℃；⑦共沸精馏的较佳条件为：回流比为10：1，喹啉馏分与共沸剂的质量比为1：2．4，切取温度范围为188．4～188．8℃，喹啉的纯度可达98．5％。该方法具有操作简单、步骤少、纯度高、无污染的特点。

The separation and purification of quinoline were studied by the way of rectifieation-azeotropic distillation with wash oil as raw material in the paper. First, the fractions in different temperature ranges were ingathered by rectifying wash oil;azeotropic distillation were done with the different fractions and ethanediol respectively. The effects of different conditions on quinoline＇ s purity were investigated by changing the quality ratio of fraction to ments. The results of experiments shows ethanediol and reflux ratio in the azeotropic distillation experi- that when reflux ratio is 10 ： 1 and the temperature range of fraetion is 220 - 230 ℃, the best result is gotten in the rectification experiments; when reflux ratio is 10 ： 1, quality ratio of fraction to ethanediol is 1 ： 2.4 and the temperature range of ingathering quinoline is 188.4 - 188.8 ℃, the best result is gotten in the azeotropic distillation experiments. The method has many characteristics such as simple operation, less procedures, higher purity（ ≥98.5% ） ,no pollution.