摘要
采用正庚烷、正己烷、环己烷、1,2-二氯乙烷、四氯化碳和苯等共沸剂,较系统地考察了共沸剂及回流比对碳酸二甲酯(DMC)-甲醇共沸物共沸精馏分离效果的影响。结果表明,采用共沸精馏法可以高效分离DMCCH3OH共沸物,调控回流比以及共沸剂可以有效改变分离后釜液中组分的组成。在相同共沸剂下,当回流比为7∶1和8∶1时DMC-CH3OH共沸物的分离效果较好。在相同回流比7∶1下,采用不同共沸剂共沸精馏DMC-CH3OH混合物得到DMC质量分数顺序为:1,2-二氯乙烷>四氯化碳>环己烷>苯>正己烷>正庚烷。
The effects of azeotropic solvent and reflux ratio on the separation efficiency of dimethyl carbonate(DMC)-methanol mixture were investigated systematically after azeotropic distillation with n-heptane,n-hexane,cyclohexane,1,2-dichloroethane,carbon tetrachloride and benzene,respectively.The results showed that the azeotropic distillation method could be used to separate DMC-CH3 OH azeotrope efficiently.Controlling the reflux ratio and the azeotrope agent could effectively change the composition of components in the kettle solution after separation.For the same azeotrope,the optimal reflux ratios were 7∶1 or 8∶1,the higher separation efficiency for DMC-CH3 OH mixture was obtained.Moreover,at the same reflux ratio(7∶1),solvent could affect the mass fraction of DMC after azeotropic distillation,and the order of mass fraction of DMC was 1,2-dichloroethane>CCl4>C6 H12>C6 H6>n-C6 H14>n-C7 H16.
作者
王伟林
李忠
郑华艳
WANG Weilin;LI Zhong;ZHENG Huayan(Technology Center,Shanxi Lu'an Mining(Group)Co.,Ltd.,Xiangyuan 046204,Shanxi,China;Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province,Taiyuan University of Technology,Taiyuan 030024,Shanxi,China)
出处
《精细化工》
EI
CAS
CSCD
北大核心
2020年第8期1665-1671,共7页
Fine Chemicals
基金
国家自然科学基金(U1510203)
山西省应用基础研究计划(201901D111118)。
关键词
共沸精馏
碳酸二甲酯
甲醇
共沸剂
回流比
分离提纯技术
azeotropic distillation
dimethyl carbonate
methanol
azeotropic agent
reflux ratio
separation and puritication technology
作者简介
王伟林(1982-),男,工程师,E-mail:edwardwwl@126.com;联系人:郑华艳(1982-),男,副教授,E-mail:zhenghuayan@tyut.edu.cn。
