摘要
草酸二甲酯(DMO)加氢制乙醇酸甲酯(MG)是延长煤化工产品链的一条重要技术路径。由于乙醇酸甲酯(MG)的主要用途是水解制备乙醇酸(GA),工艺上可以有2种分离方案。方案1为先精馏提纯MG,然后MG水解制备GA。方案2则为DMO加氢反应混合物直接先去水解,然后再进行产物分离获得GA。本文分别对2种分离工艺进行了模拟,并对精馏塔级数,回流比,过程能耗等方面进行了比较,结果表明方案1能耗更低,且产品分离塔所需理论板数较少,所以DMO加氢制MG反应产物采取先精馏分离MG后水解生产GA的工艺比较合理。
Dimethyl oxalate（DMO） hydrogenation to methyl glycolate（MG） is an important technology path to extend the product chain of coal chemical.There are two kinds of processes on product separation because methyl alcohol（MG） are mainly used for produce glycolic acid（GA） by hydrolysis.The first case is that the MG is refined from the reactant of the DMO hydrogenation firstly and then hydrolyze to GA.The second case is that the reactant of the DMO hydrogenation is hydrolyzed directly and then the GA is separated from mixtures.In this paper,the two kinds of cases are simulated and compared on stages,reflux ratio and energy consumption.The results show that the first case has lower energy consumption and the number of theoretical stages,the process of the hydrogenation products to hydrolysis after separation is more reasonable.
出处
《计算机与应用化学》
CAS
CSCD
北大核心
2011年第8期1027-1029,共3页
Computers and Applied Chemistry
关键词
草酸二甲酯
乙醇酸甲酯
分离
模拟
dimethyl oxalate
methyl glycolate
separation
simulation
