摘要
Abstract
The by-product methyl acetate was derived from alcoholysis reaction during PTMEG process.The azeotropic system between methanol and methyl acetate was easily formed when separating methyl acetate,so high purified methyl acetate is difficult to be obtained.The characteristics of binary azeotrope formed by methanol and methyl acetate were investigated and a double-effect distillation to separate methanol and methyl acetate was proposed.Aspen Plus software was used to simulate and optimize the separating process.The results show that the operating pressure is 35 kPa(G)for low pressure tower,tower top recovery is 1500 kg/h,theoretical plate number is 23,feeding at 9th plate,the reflux ratio is 6,S6 stream feeds at 5th plate.For high pressure tower,operating pressure is 680 kPa(G),theoretical plate number is 19,feeding at 7th plate,the reflux ratio is 3.Energy-saving rates for bottom reboiler and overhead condenser in double-effect distillation process are 27.18% and 28.35%, respectively.关键词
甲醇/醋酸甲酯/双效精馏/AspenPlus模拟Key words
methanol/methyl acetate/double-effect distillation/Aspen Plus simulation分类
化学化工
