甲代烯丙基氯分离过程模拟与优化  

Simulation and Optimization of Methylallyl Chloride Separation Process

作　　者：杨朋举 林金元 吴志刚[2] 吴宇鹏[2] 江泳[2] 王训遒[1] Yang Pengju;Lin Jinyuan;Wu Zhigang;Wu Yupeng;Jiang Yong;Wang Xiuqiu(School of Chemical Engineering of Zhengzhou University,Zhengzhou 450000,China;Electrochemistry Plant of Zhejiang Juhua Co.,Ltd.,Quzhou 324004,China)

机构地区：[1]郑州大学化工学院,河南郑州450001 [2]浙江巨化股份有限公司电化厂,浙江衢州324004

出　　处：《化工设计》2024年第2期3-7,1,共6页Chemical Engineering Design

摘　　要：甲代烯丙基氯可由1,2-二氯-2-甲基丙烷气相催化脱氯化氢反应制备,但需要进一步分离提纯。以1,2-二氯-2-甲基丙烷气相催化脱氯化氢反应的粗产物为基准,利用Aspen Plus软件模拟优化了减压双塔精馏工艺。物性方法采用UNIFAC模型,为验证模型可靠性,通过比较具有类似结构体系氯乙烯和1,1,2-三氯乙烷相平衡数据的计算值和文献值偏差,结果中y1最大相对偏差为0.69%,表明了模型具有一定可靠性。在满足甲代烯丙基氯质量分数高于99.50%、收率大于90.00%的设计目标要求下,探究了各精馏塔操作参数如理论板数、进料位置、回流比、塔顶采出量与进料质量流率比和操作压力对甲代烯丙基氯产品质量分数以及收率影响,得到各塔较优的操作参数,同时,计算了各塔的蒸汽与冷却水消耗量,计算结果表明,在较优条件下,甲代烯丙基氯产品质量纯度达99.56%,收率达90.21%。Methylallyl chloride can be prepared by gas-phase catalytic dehydrochlorination of 1,2-dichloro-2-methylpropane,but further separation and purification are required.Based on the crude product of the gas-phase catalytic dehydrochlorination reaction of 1,2-dichloro-2-methylpropane,Aspen Plus software is used to simulate and optimize the vacuum double column distillation process.The physical property method adopts UNIFAC model.In order to verify the reliability of the model,the calculated values of the phase equilibrium data of vinyl chloride and 1,1,2-trichloroethane with similar structural systems are compared with the literature values.The maximum relative deviation of y1 in the results is 0.69%,indicating that the model has a certain degree of reliability.Under the design goal of achieving a mass fraction of over 99.5%and a yield of over 90.0%for methylallyl chloride,the effects of operating parameters such as theoretical plate number,feed position,reflux ratio,top extraction rate to feed mass flow rate ratio,and operating pressure on the mass fraction and yield of methylallyl chloride products are explored.The optimal operating parameters for each column are obtained,and the steam and cooling water consumption of each column are calculated.The calculation results show that under optimal conditions,the mass purity of methylallyl chloride products can reach 99.56%,and the yield can reach 90.21%.

关 键 词：甲代烯丙基氯 1 2-二氯-2-甲基丙烷 Aspen Plus UNIFAC 

分 类 号：TQ028[化学工程]