【摘要】 以醋酸甲酯合成为模型反应,研究浆料催化精馏过程。对浆料催化精馏过程建立拟均相稳态平衡级模型,用A spen P lus软件进行模拟。考察精馏塔内温度分布、汽液相组成及流率情况,得到醋酸中水含量、反应段塔板数和液相持液量对合成醋酸甲酯收率和塔顶醋酸甲酯纯度的影响。计算得出在模拟实验塔内优化操作条件为:23块理论板数,醋酸进料口和甲醇进料口分别位于第7和第17块理论板;酸与醇的摩尔比为1.2∶1.0;催化剂与醋酸的质量比为0.03;回流比1.3;塔板总持液量2 560mL;塔釜持液量1 200mL;控制塔顶采出流率0.485。在此条件下,醋酸甲酸收率大于95%,塔顶产品中酯的质量分数大于96%。更多还原

【Abstract】 A homogeneous steady equilibrium stage model was established to simulate slurry catalytic distillation process in esterification of acetic acid（HOAc） and methanol（MtOH）.Distributions of temperature,composition and flow rate in column,and effects of water content in feed,plate number,total liquid holdup on yield and purity of methyl acetate were systematically studied.Under optimal operation conditions:23 theoretical plates,HOAc feed at 7^th plate,MtOH feed at 17^th plate,n（HOAc） ∶n（MtOH） = 1.2 ∶1.0,（m（catalyst） ∶）（m（HOAc））=0.03,reflux ratio 1.3,total liquid hold up in plates 2 560mL,liquid volume in tank 1 200mL,and mole flow rate of top to total feed rate 0.485,yield and mass fraction of methyl acetate in top product were more than 95% and 96% in experimental column,respectively.更多还原