精对苯二甲酸生产中副产物醋酸甲酯催化精馏水解研究  

Study on Hydrolysis of Methyl Acetate from Production of Pure Terephalic Acid by Catalytic Distillation

作　　者：潘远波[1] 李维新[2] 沈品德[2] 万辉[1] 韩明娟[1] 管国锋[1] 

机构地区：[1]南京工业大学化学化工学院,江苏南京210009 [2]中国石化扬子石油化工股份有限公司,江苏南京210048

出　　处：《化学反应工程与工艺》2009年第2期132-136,共5页Chemical Reaction Engineering and Technology

摘　　要：在间歇搅拌釜反应器中考察了不同强酸性阳离子交换树脂催化醋酸甲酯水解效果的影响,选择Amberlyst 35型阳离子交换树脂为水解催化剂。建立了催化精馏实验装置,反应段采用捆扎包装填方式,考察了塔结构、进料水酯比、回流进料比和空速对催化精馏效果的影响。结果表明,催化精馏水解合适的条件为醋酸甲酯从反应段底部进料,水从反应段顶部进料,反应段6块理论板,提馏段5块理论板,空速0.36 h^(-1),进料水酯物质的量比5,回流进料体积比3,醋酸甲酯的水解率可以达到61.6%。使用Aspen Plus软件对醋酸甲酯催化精馏水解过程进行模拟,模拟值和实验值吻合较好。The effects of different cation-exchange resins on hydrolysis of methyl acetate （MeOAc） from production of pure terephalic acid were investigated in a batch stirred tank reactor, and it was found that the catalytic performance of macroreticular ion-exchange resin Amberlyst 35 for hydrolysis of methyl acetate was better. An experimental apparatus was set up and catalyst-bundles of ion exchange resin were packed in a column as a reaction zone. The effects of height of reaction and stripping zones, molar ratio of feed water to MeOAc （Rm）, volume ratio of reflux to feed MeOAc （Rf） and space velocity （Sv） were investigated. The appropriate operation conditions were determined as follows： the feed positions of methyl acetate and water were at the bottom and top of the reaction section, respectively; six theoretical stages were assumed for reaction segment, whereas for striping section, five theoretical stages were specified; Sv was 0.36 h^-1, Rm was 5, Rf was 3. Under the conditions, the conversion of methyl acetate was 61.6%. The hydrolysis of MeOAc by catalytic distillation was simulated by Aspen Plus and the simulation results were in good agreement with the experimental results.

关 键 词：醋酸甲酯 水解 催化精馏 模拟 

分 类 号：TQ028.13[化学工程] TQ031.5