文章摘要
王伟林,李忠,郑华艳.共沸剂对碳酸二甲酯-甲醇共沸物分离效率的影响[J].精细化工,2020,37(8):
共沸剂对碳酸二甲酯-甲醇共沸物分离效率的影响
Effect of azeotropic agent on dimethyl carbonate-methanol azeotrope separation process
投稿时间:2020-04-29  修订日期:2020-06-19
DOI:
中文关键词: 共沸精馏  碳酸二甲酯  甲醇  共沸剂  回流比
英文关键词: azeotropic distillation  dimethyl carbonate  methanol  azeotropic reagent  reflux ratio
基金项目:国家自然科学基金(U1510203);山西省应用基础研究计划(201901D111118)
作者单位E-mail
王伟林 山西潞安矿业(集团)有限责任公司 edwardwwl@126.com 
李忠 太原理工大学  
郑华艳 太原理工大学 zhenghuayan@tyut.edu.cn 
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中文摘要:
      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(CH3OH)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DMC-CH3OH共沸物,通过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。采用相同共沸剂下,当回流比为7∶1和8∶1时DMC-CH3OH共沸物的分离效果较好。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的质量分数和收率顺序为:1,2-二氯乙烷>四氯化碳>环己烷>苯>正己烷>正庚烷。
英文摘要:
      This paper systematically investigates the influence of azeotropic solvent and reflux ratio on separation efficiency of DMC-CH3OH mixture after azeotropic distillation with various solvents: n-C7H16, n-C6H14, C6H12 (hexamethylene), CH2ClCH2Cl, CCl4 and C6H6, respectively. It is experimentally proved that azeotropic distillation method is highly efficient for the separation of DMC-CH3OH mixture. The results indicate that the composition of residue can be effectively regulated by modifying azeotropic solvent and reflux ratio. For azeotropic solvents investigated, the optimal reflux ratios are 7:1 or 8:1, which can lead to higher separation efficiency for DMC-CH3OH mixture. Moreover, at the same reflux ratio (7:1), the content and yield of DMC after azeotropic distillation are dependent on different solvents as the following order: CH2ClCH2Cl > CCl4 > C6H12 > C6H6 > n-C6H14 > n-C7H16.
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