醇钠法合成一缩二丙二醇及其动力学研究  

Synthesis of Dipropylene Glycol and its Macro-kinetics with Sodium Methoxide as Catalyst

作　　者：叶庆国[1] 韩平[1] 阎淑芸[1] 宋斌[1] 张德强[1] 

机构地区：[1]青岛科技大学化工学院,山东青岛266042

出　　处：《化工技术与开发》2009年第1期5-8,共4页Technology & Development of Chemical Industry

摘　　要：以甲醇钠为催化剂,对合成一缩二丙二醇的影响因素进行了考察,筛选出适宜的合成工艺条件:反应温度100℃,丙二醇与环氧丙烷摩尔比0.9∶1,反应时间8 h,催化剂用量为总反应物重量的4%,环氧丙烷加料速度90 g.h-1,该条件下的一缩二丙二醇收率和环氧丙烷转化率分别为70.3%和80.5%。通过考察反应速率与反应物浓度的关系,建立了反应的动力学模型。结果表明,该反应为二级动力学反应,反应的表观活化能为25.4 kJ.mol-1。文中给出的计算值与试验值的比较,证明了该模型的可行性。Main influence factors on the synthesis of dipropylene glycol （DPG） were studied applied sodium methoxide as catalyst. The suitable reaction conditions were： reaction temperature 100℃, molar ratio of propylene glycol（PG） to propylene oxide（PO） 0.9：1, reaction time 8h, catalyst amount （based on the total amount draw materials） 4%, feeding rate of PO 90 g·h-1, yield of DPG 70.3% and conversion of PO 80.5%. Macro-kinetics of reaction was built by investigating the dependence of reaction rate upon the concentration of PG and PO. The results showed that the reaction order was second and the apparent activation energy was 25.4 kJ· mol-1. The comparison between calculating values and experimental ones confirmed the feasibility of the model.

关 键 词：一缩二丙二醇 甲醇钠 宏观动力学 

分 类 号：TF123.74[冶金工程—粉末冶金]