화학공학소재연구정보센터
Catalysis Today, Vol.157, No.1-4, 114-118, 2010
Selective oxidation of pyridine to pyridine-N-oxide with hydrogen peroxide over Ti-MWW catalyst
The oxidation of pyridine to pyridine-N-oxide (PNO) with hydrogen peroxide has been investigated on various titanosilicate catalysts Superior to other titanosilicates like TS-1 Ti-Beta and Ti-MOR Ti-MWW showed a higher catalytic activity and product selectivity The reaction parameters such as solvent temperature hydrogen peroxide/substrate ratio the amount of catalyst and Ti content were optimized to maximize the PNO yield Ti-MWW was capable of giving pyridine conversion and PNO selectivity both over 99% under optimum reaction conditions Ti-MWW was a highly active selective and reusable catalyst for the synthesis of PNO The mechanism for the oxidation of pyridine over titanosilicates has also been considered Ti-MWW was further structurally modified to posses open reaction spaces by interlayer expansion which reduced the diffusion limitations in the oxidation of pyridine derivatives with bulkier molecular dimensions (C) 2010 Elsevier B V All rights reserved