催化合成己二酸二异辛酯的新工艺

The New Technics of synthesis of Diisooctyl Adipate with Catalyst

将聚乙烯醇与四氯化钛在二甲基亚砜和无水乙醇混合溶剂中进行反应,制得了负载钛酸酯催化剂PVAC-1,用红外光谱对其进行了表征。结果表明合成中投入3.5g聚乙烯醇,3mL四氯化钛时,过程容易控制,且催化剂的活性已达很高。确定了在PVAC-1催化作用下,合成己二酸二异辛酯的最佳反应条件及结果:即190～200℃下,加入0.3g催化剂,0.1mol己二酸与0.3mol异辛醇反应70min后,己二酸的转化率可达99.8%,PVAC-1重复使用18次后,己二酸的转化率仍保持在96%以上。

A polymer-supported titanate was prepared by reacting titanium tetrachloride with polyvinyl alcohol in anhydrous alcohol and dimethyl sulfoxide solutions and then characterized using FTIR. The results showed that synthesis process was easily controlled and the catalyst have had high catalytic activity when the ratio of polyvinyl alcohol to titanium tetrachloride was 3.5 g ： 3 mL. The optimum reaction conditions were obtained. Adipic acid （0.1 mol） and isooctyl alcohol（0.3 mol） reacted for 70 min at 190-200 ℃ with 0.3 g PVAC-1 as catalysts, when conversion of adipic acid could reach 99.8 %, and the conversion remained over 96 %after the catalyst was reused 18 times.