摘要
应用化工过程模拟软件Aspen Plus对丙酮-氯仿最低共沸物系的连续萃取精馏过程进行了模拟与优化。通过Aspen物性分析,筛选出合适的萃取剂为二甲基亚砜。确定了双塔连续萃取精馏的工艺流程,并利用灵敏度分析工具考察了萃取精馏塔的理论塔数、回流比、原料进料位置、萃取剂进料位置、溶剂比(萃取剂对原料的物质的量比)对分离效果的影响。确定的最佳工艺方案为:全塔理论板数为45,原料和萃取剂分别在第11块和第3块理论板进料,回流比为2.5,溶剂比为1.9。在此工艺条件下:萃取精馏塔塔顶丙酮的分离效果达99.95%,萃取剂回收塔塔顶氯仿的纯度达到98.34%;萃取剂二甲基亚砜的循环补充量为5.557mol/h。模拟与优化结果为丙酮-氯仿共沸物连续萃取精馏分离过程的设计和操作提供了参考。
Continuous extractive distillation process for acetone-trichloromethaneazeotropic system was simulated and optimized using Aspen Plus. By Aspen physical propertyanalysis,dimethyl sulfoxide was selected as a suitable extractant. The process of continuous extractive distillation with two columns was confirmed,The separation effect of the number of theory stages,the mixture feed stage,the solvent feed stage,the reflux ratio and the mole ratio of extractant to mixture（ solvent ratio） were investigated using sensitivity analysis tool. The optimal condition for the extractive distillation is as follows： the number of theory stages is 45,the mixture feed stage is 11 st,the solvent feed stage is 3 rd,the reflux ratio is 2. 5,and the solvent ratio is 1. 9.Under the technological condition： The separation effect of acetone of extractive distillation tower of is up to 99. 95%,The purity of trichloromethane of the extractant-recovery column is 98. 34%; Cyclic supplementation of dimethyl sulfoxide is 5. 557 mol/h.The results are useful for the design and operation of continuous extractive distillation process for acetone-trichloromethaneazeotropic system.
出处
《山东化工》
CAS
2017年第20期124-126,共3页
Shandong Chemical Industry
关键词
萃取精馏
ASPEN
Plus
丙酮
氯仿
二甲基亚砜
extractive distillation
aspen plus
acetone
trichloromethane
dimethyl sulfoxide
