加盐萃取精馏法分离间二甲苯-对二甲苯的研究  

Study on Extractive Distillation for Separating of M-xylene and P-xylene

作　　者：杨玉敏[1] 崔蕊[1] 臧红霞[1] 胡洁[1] 

机构地区：[1]邢台学院,河北邢台054001

出　　处：《广东化工》2015年第19期38-39,43,共3页Guangdong Chemical Industry

基　　金：邢台市科技局科技支撑计划项目(2012ZC027):焦化粗苯精制-混合二甲苯的分离及异构化研究;邢台学院校级科研项目(XTXY11Y31):煤焦油深加工技术-混合二甲苯的分离

摘　　要：文章研究了不同萃取剂和盐对间二甲苯-对二甲苯体系的相对挥发度的影响。测定了萃取剂和盐的的种类、用量对萃取精馏的影响。研究结果表明:当采用邻苯二甲酸二丁酯和N,N-二甲基甲酰胺作为混合萃取剂、用量与体系溶液比为1.5∶1、盐为氯化镁时,该体系的相对挥发度由1.0259增大至1.0894。这为加盐萃取精馏工业化分离间、对二甲苯提供有意义的指导。The paper studied the effects of different extractive agents and salts on the relative volatility between m-xylene and p-xylene system. The influence of diverse extraction and salt on extractive distillation was determined. The results showed that the best operation conditions include： dibutyl phthalate and N,N-dimethyl formamide as a mixed extractive agent; its dosage and solution ratio is 1.5; magnesium chloride as the salt. Under these conditions, push the relative volatility of the system up to about 1.0894. The work provided the meaningful guidance for the separation of m-xylene and p-xylene in industry.

关 键 词：加盐萃取精馏 间二甲苯 对二甲苯 相对挥发度 

分 类 号：TQ[化学工程]