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Ilham Jioui,Karim Daˆnoun,Abderrahim Solhy,Mustapha Jouiad,Mohamed Zahouily,Bilal Essaid,Christophe Len,Aziz Fihri 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.39 No.-
In the present study, we investigated the synthesis of fluorapatite using a pseudo sol–gel processand the chemical modification of this new catalyst support via impregnation of sodium nitratefollowed by calcination at 550 8C in order to enhance its catalytic performance. This approach wasused to obtain a bi-functional catalyst for Claisen–Schmidt condensation. Indeed, this heterogeneouscatalyst exhibited excellent catalytic activity and high selectivity for the synthesis of chalconesfrom direct aromatic aldehydes with substituted ketones at room temperature. The operationalsimplicity, excellent yields of the products and the recyclability of the catalyst are the mainadvantages of this method.
Glycerol oligomerization in continuous flow reactor
Nicolas Galy,Rémi Nguyen,Philippe Blach,Sophie Sambou,Denis Luart,Christophe Len 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.51 No.-
Thefirst synthesis of polyglycerol in continuousflow reactor in presence of potassium carbonate ashomogeneous catalyst was reported varying different parameters: temperature,flow and residence time. The different regioisomers of glycerol dimers and glycerol trimmers have been characterized and thedistribution of the different oligomers has been quantified. Further investigations in a cyclic mode,combined with short path distillation, afforded a mixture of predefined glycerol oligomers with adistribution: glycerol dimer (20 wt%), glycerol trimer (21 wt%), glycerol tetramer (16 wt%) and glycerolpentamer (11 wt%).