CENTRO DE INVESTIGACION Y DESARROLLO EN CIENCIAS APLICADAS "DR. JORGE J. RONCO"
Unidad Ejecutora - UE
congresos y reuniones científicas
ZSM-5 modified with cobalt as novel solid catalyst
CLARA SAUX; H. BONA; LUIS R. PIZZIO; LILIANA B. PIERELLA
Simposio; 11th International Symposium on the "Scientific Bases for the Preparation of Heterogeneous Catalysts"; 2014
Green chemistry is one of the tendencies of scientists all over the world. Many efforts are constantly done to reach new chemical process avoiding waste generation and no desirable products formation. In this way,heterogeneous catalysis is an important field of growing interest in both academic and industrial research. Inpractice, the substitution of homogeneous catalysts with solid catalysts is very attractive in view of the reduction ofwaste formation, as well as for safety and corrosion aspects .In this context, the use of catalytic processes with Keggin type heteropolycompounds (HPC) has been widelystudied in recent years. One of the reasons is related to the dual character of such compounds, since they are strong acids and can also act as efficient oxidants. However, the low surface area (< 10 m2/g) and porosity (< 0.1cm3/g) of bulk HPC, together with a high solubility in polar solvents, lead to the search of supports that can immobilize them . For this purpose, the use of zeolites as highly ordered and with an unusual high surface areaseems to be an interesting alternative as support of the HPC. Zeolites are crystalline microporous aluminosilicates offering a plethora of modifications and opportunities for further improvement of their properties. Research in the field of the catalytic oxidation of sulfides is promoted due to several reasons: (a) the synthesis of different chemically and biologically important molecules and (b) the removal of sulfur from industrial productsand wastes, in order to comply with environmental legislations. The oxidation of 2-(methylthio)benzothiazole was chosen as model reaction for this study since this substrate is present in diverse and important organic compounds that were used in distinct industrial processes and the corresponding sulfoxide and sulfone are more biodegradable than the substrate.