Synthesis of Trimethylolpropane Esters of Oleic Acid Using a Multi‐SO₃H‐Functionalized Ionic Liquid as an Efficient Catalyst

Abstract

Biodegradable trimethylolpropane triesters of oleic acid were synthesized by esterification of trimethylolpropane and oleic acid over a multi-SO 3 H-functionalized strong Brønsted acidic ionic liquid as the catalyst. The results showed that the esterification can proceed satisfactorily over the catalyst at an ambient pressure even without simultaneous removal of water. Under the optimal reaction conditions (temperature: 100°C, reaction time: 3 h, reactant molar ratio: 3.6:1, and catalyst amount, high conversion rate of trimethylolpropane (99.0%) and selectivity of trimethylolpropane triester (92.1%) were obtained. The ionic liquid was reused six times after the removal of water and no obvious change in catalytic activity was detected. Operational simplicity, high yields along with good reusability makes the multi-SO 3 H-functionalized ionic liquid a promising catalyst for the esterification of trimethylolpropane with oleic acid.

Decoration of chitosan microspheres with Brønsted heteropolyacids and Lewis ion Ti: trifunctional catalysts for esterification to biodiesel

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Novel Keggin-type H 4 PVMo 11 O 40 -based ionic liquid catalysts for n -caprylic acid esterification

“…However, a slight decrease of the yield was observed when catalyst to n-caprylic acid molar ratio exceeded 0.52 mol%. This might be due to the side effect which derived from the acidity of excessive [MIM-PSH] 2.0 H 2.0 PVMo 11 O 40 [44] . Taking into account the efficiency of catalyst and the issue of cost, the catalyst to n-caprylic acid molar ratio should be around 0.52 mol%.…”

Designed ether‐functionalized acidic ionic liquid catalyst for butyl acetate synthesis

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