Synthesis of glycidol from glycerol and dimethyl carbonate using ionic liquid as a catalyst
Transesterification of dimethyl carbonate with glycerol has been investigated using various ionic liquids as catalysts. Synthesis of glycidol with high selectivity (78%) has been achieved using tetramethylammonium hydroxide ([TMA][OH]) as a catalyst at 80 °C. Effect of various reaction conditions on the activity and selectivity was investigated and catalyst concentration had a significant influence on conversion as well as selectivity to glycidol. Activity as well as selectivity of the catalyst decreased significantly with increase in moisture content. Recycle experiment indicated slight drop in glycerol conversion and selectivity to glycidol because of dilution of reaction mixture and also the presence of products from the initial experiment.
Graphical abstractTransesterification of glycerol has been investigated using various ionic liquids as catalysts. Synthesis of glycidol with high selectivity (78%) has been achieved using tetramethylammonium hydroxide (TMAOH) as a catalyst at 80 °C.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Transesterification of DMC with glycerol was investigated using ionic liquids as catalysts. ► Tetramethylammonium hydroxide as a catalyst gave 78% selectivity to glycidol at 80 °C. ► Optimization of reaction conditions was carried out with [TMA][OH] as a catalyst. ► [TMA][OH] concentration had a significant influence on conversion and selectivity.
Journal: Catalysis Communications - Volume 27, 5 October 2012, Pages 184–188