摘要
采用微波辐射技术,以纳米稀土复合固体超强酸SO_4^(2-)/ZrO_2-2%Nd_2O_3为催化剂,以草酸与正丁醇为原料合成草酸二丁酯。通过正交实验,探讨了诸因素对酯化率的影响,结果表明,纳米稀土复合固体超强酸So_4^(2-)/ZrO_2-2%Nd_2O_3催化剂具有良好的催化活性,当草酸用量为0.1 mol,醇酸摩尔比为3.0:1,催化剂用量为反应物总质量的1.6%,微波输出功率468 W,辐射时间14 min时反应的酯化率可达97%以上。该催化剂易于回收且可重复使用,具有价廉易得、催化效果好、操作简单、无环境污染等优点。
Bibutyl oxalate was synthesized with oxalic acid and butyl alcohol as raw materials and nanosized rare earth composite solid superacid SO4^2-/ZrO2-2%Nd2O3 as catalyzer under microwave radiation. The factors influencing the synthesis were discussed. The results by orthogonal experiments showed that nanosized rare earth composite solid superacid SO4^2-/ZrO2-2%Nd2O3 was an excellent catalyst for synthesizing bibutyl oxalate. When the dosage of oxalic acid was 0. lmol, molar ratio of butyl alcohol to oxalic acid was 3.0: 1, the dosage of catalyst was equal to 1.6% (based on the total mass of feed stock), microwave power was 468W, microwave radiation time was 14 min, the esterification ratio was more than 97%. Moreover,the catalyst could be easily recovered and reused, and had characteristics of low cost, high catalytic efficiency, wide availability, easy operation, and environmental friendliness.
出处
《精细石油化工进展》
CAS
2008年第5期31-34,共4页
Advances in Fine Petrochemicals
基金
湖南省教育厅优秀青年科研基金项目(06B089)。