纳米稀土复合固体超强酸对己酸烯丙酯的催化合成研究

Study on Catalytic Action of Nanosized Rare Earth Composite Solid Super-acid for Acetic Acid olefin Propylester

以纳米稀土复合固体超强酸SO42-/ZrO2-2%Nd2O3为催化剂,通过己酸与烯丙醇反应合成己酸烯丙酯.探讨了诸因素对酯化率的影响,正交实验结果表明:SO42-/ZrO2-2%Nd2O3固体超强酸具有良好的催化活性,醇酸物质的量比为2:1,反应时间为2.5h,带水剂甲苯20mL,催化剂用量为反应物料总质量的3.0%时,酯化率达98.2%.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.

Allyl hexanoate was synthesized from hexanic acid and allyl alcohol with nanosized rare earth composite solid super-acid SO4^2-/ZrO2-2%Nd2O3 as catalyst. The factors influencing the synthesis were discussed. The re- suits by orthogonal experiments showed that SO4^2-/ZrO2-2%Nd2O3 was an excellent catalyst for synthesizing allyl hexanoate, molar ratio of allyl alcohol to hexanic acid was 2.0：1.0, the reaction time was 2.5h, the water carrying agent of toluene was 20ml, the quantity of catalyst was equal to 3.0% by mass of the total feed stock. On these conditions, esferification rate was 98.2% .The catalyst could be easily recovered and reused, and enjoyed such merits as being cheap, efficient, widely available, easy to carry out, and environmental friendly.