耦合精馏制取乙基叔丁基醚可行性分析及模拟优化  

Feasibility analysis and optimization of ethyl tert-butyl ether coupling separation process

作　　者：李永飞 刘桂莲[1] Li Yongfei;Liu Guilian(School of Chemical Engineering,Xi’an Jiaotong University,Xi’an Shaanxi 710049,China)

机构地区：[1]西安交通大学化学工程学院,陕西西安710049

出　　处：《石油化工》2018年第9期985-990,共6页Petrochemical Technology

基　　金：国家自然科学基金资助项目(U1662126;21476180)

摘　　要：根据耦合乙基叔丁基醚(ETBE)-乙醇分离和乙醇脱水的新思路,采用UNIQUAC物性方法回归了ETBE-水-乙醇三元物系中ETBE的交互作用参数,并基于剩余曲线图用边界值法分析了ETBE-乙醇和乙醇-水耦合分离的可行性。利用Aspen Plus软件对耦合工艺流程进行了详细模拟,并优化了部分操作参数。模拟结果表明,该流程可生产纯度在98%(w)以上的ETBE,且分离得到的无水乙醇除用于提供ETBE的反应原料外,每天可额外产出5.6 t;在醇烯比为1.5、异丁烯转化率为95%的条件下时,乙醇浓缩液含量为94%(w)时,浓缩塔和耦合分离塔的总平均能耗最小。The feasibility of producing ethyl tert-butyl ether(ETBE)by coupling separation of ETBEethanol and ethanol-water mixtures was addressed and a detailed simulation model was built.The binary interaction parameters of ETBE in the ternary system ETBE-water-ethanol were regressed by UNIQUAC property method.In addition,the feasibility of the coupling separation was analyzed based on the residue curve map.Operating parameters were optimized based on the simulation of Aspen Plus.The results showed that this coupling separation process could produce ETBE with a mass fraction greater than 98%and that the produced absolute ethanol not only could be used as raw materials for the synthesis of ETBE,but also could be output extra by 5.6 t/d.Moreover,the minimum total average energy consumption of concentration column and coupling separation column could be achieved when the concentration of the concentrate was 94%(w).

关 键 词：乙基叔丁基醚 无水乙醇 耦合分离 模拟 优化 

分 类 号：TQ021.8[化学工程]