共沸精馏分离2-甲基吡啶和水

发布时间：2018-04-12 06:13

本文选题：-甲基吡啶 + 水　；参考：《化工进展》2017年09期

【摘要】：采用共沸精馏的方法分离2-甲基吡啶和水二元均相共沸物系。选取环己烷作为共沸剂,利用流程模拟软件Aspen Plus对共沸精馏塔进行模拟计算,分析了不同共沸剂用量、塔底采出量以及进料位置等操作参数对产品纯度、共沸剂的损失量以及精馏塔热负荷的影响,模拟结果表明当精馏塔的塔板数为21,共沸剂的用量为3600kg/h,塔底采出量为888kg/h,原料进料位置在第15块板时,共沸精馏塔塔底可得到质量分数为99.54%的2-甲基吡啶,塔顶分相罐下层可采出质量分数为99.97%的水。最后,通过间歇共沸精馏实验对以环己烷为共沸剂分离2-甲基吡啶-水物系的效果进行检验,结果表明共沸精馏塔塔底2-甲基吡啶的质量分数达99.85%,塔顶水相可采出质量分数达99.96%的水,证明了该工艺路线具有良好的可行性。
[Abstract]:2-methyl pyridine and water binary homogeneous azeotropic system were separated by azeotropic distillation.Using cyclohexane as azeotropic agent, the azeotropic distillation column was simulated by Aspen Plus, and the purity of the product was analyzed by using different azeotropic agent dosage, bottom extraction amount and feed position.The simulation results show that when the column plate number is 21, the azeotropic agent dosage is 3600kg / h, the bottom extraction amount is 888kg / h, and the feed feed position is at the 15th plate, the loss of azeotropic agent and the heat load of distillation tower are affected.2-methylpyridine with 99.54% mass fraction was obtained at the bottom of azeotropic distillation column and 99.97% water was extracted from the bottom layer of the top column.Finally, the separation of 2-methylpyridine-water system with cyclohexane as azeotropic agent was tested by batch azeotropic distillation.The results showed that the mass fraction of 2-methylpyridine in the bottom of azeotropic distillation column was 99.855.The water content of 99.96% could be extracted from the water phase at the top of the column.
【作者单位】：天津大学化工学院;
【基金】：天津大学自主创新基金(2016XZC-0071) 天津市自然科学基金(16JCYBJC20300)项目
【分类号】：TQ028.31

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