A Brønsted–Lewis-surfactant-combined heteropolyacid as an environmental benign catalyst for esterification reaction
A Brønsted–Lewis-surfactant-combined heteropolyacid (HPA) catalyst (C16TA)H4TiPW11O40 (C16TA = cetyltrimethyl ammonium) had been designed and used as a water-tolerantly heterogeneous catalyst in esterification of free fatty acid with a higher conversion (94.7%) and excellent efficiency (91.8% yield) due to its acidic properties and structures. This micellar polyoxometalate catalyst was stable during the reaction and can be recycled by a simple separation process.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Assembly of heteropolyacids into micellar system with Brønsted and Lewis acidity. ► First example of an efficient catalyst used in a micellar heteropolyacid system. ► Water-tolerant property available for esterification reaction. ► Easily handing of this catalyst.
Journal: Catalysis Communications - Volume 20, 5 April 2012, Pages 103–106