煤焦油洗油中提取联苯工艺的探讨

对煤焦油洗油进行精密精馏,获得富含联苯的馏分,作为分离精制联苯的原料。采用共沸精馏与混合溶剂析出相结合的方法,对馏分进行联苯的分离和精制。探讨了分离精制联苯的工艺,优化了工艺参数,提出了可行的工艺路线。研究结果表明,采用该工艺,可以从煤焦油洗油中得到纯度为97.5%的工业联苯。

Study on extraction process of biphenyl from gas absorber oil

Using the precise rectification to the gas absorber oil,the distillate with rich fraction of biphenyl was obtained and used as raw materials for separation of refining biphenyl.Combining the azeotropic rectification and the component solvent separate out,the separation and the purification of biphenyl were performed.In this research,the separation technique of refining biphenyl was discussed;the techniques parameters were optimized and feasible route was proposed.The results show that the industry biphenyl with purity of 97.5% can be obtained from the gas absorber oil using this technique.