邻苯二甲酸二辛酯的合成研究(毕业论文doc).doc

邻苯二甲酸二辛酯的合成研究 摘 要 邻苯二甲酸二辛酯DOP 是一种最广泛使用的增塑剂，具有良好的综合性能，增塑效率高，挥发性较低，低温柔软性较好，耐热性和耐候性良好具有良好的工业化前景。 本文以异辛醇2-乙基己醇和邻苯二甲酸酐（苯酐）为原料，在催化剂作用下合成增塑剂邻苯二甲酸二辛酯DOP。分别以氧化铝、氧化锌、乙酸锌、辛酸亚锡、对甲苯磺酸5 种单体催化剂及其以一定比例相互复配的乙酸锌/对甲苯磺酸、辛酸亚锡/氧化铝、氧化锌/氧化铝、辛酸亚锡/氧化锌 4 种复配催化剂合成 DOP，考察催化剂对合成 DOP 的影响，结果表明，氧化铝与辛酸亚锡以 1∶1 比例复配为最佳催化剂，并考察了反应条件对合成DOP 的影响，结果表明，在异辛醇与苯酐摩尔比 3∶1，辛酸亚锡/氧化铝复配催化剂用量分别占反应物总量的 0.2，反应温度 230℃，反应时间 2.5 h 的最佳工艺条件下，反应物酯化率达 91.79。 关键词: 邻苯二甲酸二辛酯 催化剂 反应温度 醇酐摩尔比 目录 Study of the Synthesis of dioctyl phthalate Abstract Dioctyl phthalate DOP is one of the most widely used plasticize high plasticizing efficiencylow volatility good low temperature flexibility good heat resistance and weatherability and hasgood prospects for industrialization. In this paperusing isooctanol 2 - ethylhexyl alcohol and phthalic anhydride phthalicanhydride as raw materials DOP is syntheticed with a catalyst. Respectively alumina zincoxide zinc acetate zinc octoate stannous p-toluenesulfonic acid monomers catalyst andcomplex with each other to a certain percentage of zinc acetate / p-toluenesulfonic acid stannousoctoate / alumina alumina / zinc oxide zinc oxide / stannous octoate the complex catalystsynthesis DOP. Study shows that alumina and stannous octoate catalyst mixed in a 1:1 ratio is thebest.The reearch of reaction conditions shows that the optimum condition is isooctyl alcohol andphthalic anhydride mole ratio of 3:1 the stannous tin / alumina complex catalyst amountrespectively accounting for 0.2 of the total amount of reactants the reaction temperature of230 ° C reaction time 2.5 h the rate of esterification is 91.79.Key words: Phthalate dioctyl phthalate；Catalyst；Reaction temperature；Alcohol anhydride more ratio 南京工业大学本科生毕业设计（论文） 目 录摘 要 ................................................................................................................................................IABSTRACT .................................................................................................................................. II