【摘要】 研究了在硼酸保护的条件下 ,以SnCl4 ·5H2 O为催化剂合成甘油单硬脂酸酯的方法 ,着重考察了催化剂用量、带水剂种类、催化剂种类对反应产率的影响。结果表明 ,SnCl4 ·5H2 O对此反应具有较高的催化活性。当甲苯作带水剂 ,n(甘油 )∶n(硼酸 )∶n(硬脂酸 ) =2∶1∶2 ,催化剂 1g ,反应温度为 1 60℃时 ,其最高产率可达 96%。所得产品经红外光谱分析和熔点检测与有关文献报道一致更多还原

【Abstract】 Glycerin monostearate is currently an important additives, emulsifier and so on in food or medicine fields. In this work, the synthesis process of glycerin monostearate catalyzed by stannic chloride, was studied in the presence of boric acid. The effect of catalyst content and the type of water taking regent were mainly investigated. The result shows that stannic chloride has a high catalytic activity. The optimal technical conditions were established as follows: molar ratio of glycerin to boric acid to stearic acid was 2∶1∶2 ; the amount of catalysts was 1 g; the reaction temperature was 160 ℃. Under the conditions toluene acts as water taking regent, the optimal yield could get to 96%. The sample of the product was analyzed by FITR. The melting point is 54～56 ℃.更多还原