连续侧线精馏分离甲醇-二甲基苯胺-三甲基苯胺-水的方案设计与优化研究  

Process design and optimization of continuous side-distillation for methanol-water-dimethylaniline-trimethylaniline mixture

作　　者：曹晓艳[1] 顾正桂[1] 冯微[1] 蔡其行[1] 

机构地区：[1]南京师范大学江苏省萃取分离工程技术研究中心,江苏南京210097

出　　处：《现代化工》2016年第4期167-169,共3页Modern Chemical Industry

摘　　要：建立精制N,N-二甲基苯胺和提取甲醇的方法,采用Aspen Plus模拟软件对连续侧线精馏精制N,N-二甲基苯胺和提取甲醇的工艺进行模拟计算,考察塔板数、原料进料位置、侧线出料位置、回流比及出料比等因素对分离效果的影响,并优化分离过程条件,确定最佳操作参数。在优化条件下,侧线出料中二甲基苯胺的质量分数达到98.70%,收率达到96.56%;侧线精馏塔顶出料混合液经精馏提取甲醇,甲醇质量分数达到99.80%、收率达到91.08%。A method to refine N,N-dimethylaniline and purify methanol is set up. Aspen Plus is used to simulate the continuous side-distillation process for refining N,N-dimethylanline and purifying methanol. A series of parameters such as the number of theoretical plates,the position of input plate and output plate of lateral line,reflux ratio and the ratio of distillate of lateral line to feed are on the separation effect are explored. The optimal operating parameters are determined through optimizing the conditions of separation. Under optimum conditions,the mass fraction and yield of N,Ndimethylaniline reach 98. 7% and 96. 56%,respectively. The mass fraction and yield of methanol can achieve 998. 8% and91. 08%,respectively,by extracting the mixture of top tower output from the continuous side-distillation process.

关 键 词：连续侧线精馏 ASPEN Plus 精制和提取 N N-二甲基苯胺 甲醇 

分 类 号：TQ641.3[化学工程—精细化工]