LDH-catalyzed esterification of lauric acid with glycerol in solvent-free system
LDH-catalyzed esterification of lauric acid with glycerol in solvent-free system
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DOI：
10.1016/j.apcata.2014.01.040
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发表时间：
2014-04
影响因子：
5.5
通讯作者：
Fabiane Hamerski;M. Corazza
中科院分区：
文献类型：
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作者：
Fabiane Hamerski;M. Corazza
油脂废料（高FFA含量）与甘油直接酯化可以是提高能源目标和为食品和化妆品工业的乳化剂生产提供替代来源的重要途径。本文报道了以层状双氢氧化物（LDH）为催化剂，月桂酸和甘油无溶剂酯化反应的实验研究。实验在机械搅拌反应器中进行，评估温度（100-180 °C）、月桂酸与甘油摩尔比（1：1-3：1）和催化剂含量（2-8重量%）的影响。结果表明，月桂酸与甘油酯化生成单月桂酸和双月桂酸时，甘油转化率较高（99%）。结果表明，无溶剂LDH催化月桂酸与甘油的酯化反应可能是一个潜在的替代路线，传统的方法，作为高含量的反应产物和选择性实现。此外，结果表明，所使用的LDH催化剂能够在相对短的时间内（最多两小时）将反应驱动至平衡。
Direct esterification of waste oil materials (high FFA contents) and glycerol can be an important way to improve the energy goals and afford alternative sources to emulsifier production for food and cosmetics industry. This work reports an experimental study of free-solvent esterification of lauric acid with glycerol using a LDH (layered double hydroxide, Mg–Al–CO3) as catalyst. The experiments were performed in a mechanically stirred reactor evaluating the effect of temperature (100–180 °C), lauric acid to glycerol molar ratio (1:1–3:1) and catalyst content (2–8 wt%). The results showed that relative high glycerol conversions (99%) can be obtained for the lauric acid esterification with glycerol leading to monolaurine and dilaurine. Results show that free-solvent LDH-catalyzed lauric acid esterification with glycerol might be a potential alternative route to conventional methods, as high contents of reaction products and selectivity was achieved. Furthermore, the results show that the LDH catalyst used was able to drive the reaction to the equilibrium in a relative short time – up to two hours.