甲醇-苯共沸物连续萃取精馏工艺的流程模拟  

The Simulation of Ethyl Acetate and Ethanol Azeotrope with Continuous Extractive Distillation Process

作　　者：汪梅[1] 王克良[1] 胡飞付 李志[1] 连明磊[1] 杜廷召 

机构地区：[1]六盘水师范学院化学与化学工程系,贵州六盘水553004 [2]中国石油集团工程设计有限责任公司华北分公司,河北任丘062552

出　　处：《山东化工》2017年第12期133-134,共2页Shandong Chemical Industry

基　　金：贵州省科技厅联合基金项目(黔科合J字LKLS[2013]27号);贵州省教育厅教学内容与课程体系改革项目(GZSJG10977201604);贵州省教育厅特色重点实验室项目([2011]278);贵州省普通高等学校煤系固体废弃物资源化技术创新团队(No:黔教合人才团队字[2014]46号);贵州省煤炭资源清洁高效利用科研实验平台(黔科平台[2011]4003号)

摘　　要：基于化工模拟软件Aspen Plus,选用苯甲醚为萃取剂,采用UNIFAC模型,对甲醇-苯共沸体系的连续萃取精馏过程进行模拟与条件优化。采用Sensitivity灵敏度分析考察了萃取精馏塔的的溶剂比(萃取剂对原料的物质的量比)、全塔理论板数、原料进料位置、萃取剂进料位置、回流比等因素对分离效果与热负荷的影响。确定的最佳工艺方案为:全塔理论板数为28,原料和萃取剂分别在第22块和第6块理论板进料,回流比为1,溶剂比为2。在此工艺方案下:产品甲醇和苯的纯度均达99.94%,萃取剂苯甲醚的回收率达99.99%,模拟与优化结果为甲醇-苯共沸物连续萃取精馏分离过程的工业化设计和操作提供了理论依据和设计参考。In this paper the extractant was anisole, continuous extractive distillation process for methanol - benzene azeotropie system was simulated and optimized by choosing UNIFAC as the physical property method of calculation using Aspen Plus V7.3. The separation effect and heat duty 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 sensitiv!ty analysis tool. The optimal condition for the extractive distillation is as follows： the number of theory stages is 28, the mixture feed stage is 22nd, the solvent feed stage is 6th, the reilux ratio is 1, and the solvent ratio is 2. Under the technological condition ： The purity of methanol and benzene are up to 99.94% ,the recovery rate of anisole is up to 99.99% ,The results are useful for the design and operation of continuous extractive distillation process for methanol - benzene azeotropic system.

关 键 词：ASPEN plus 萃取精馏 甲醇 苯 苯甲醚 

分 类 号：TQ028[化学工程]