Mesoporous mcm 41 supported metal oxides and phosphotungstic acid catalysts for chemical transformations

Abstract

In heterogeneous catalysis use of zeolites as catalysts for organic newlinetransformations began in the early 1960s They possess the usual advantages newlineover homogeneous systems viz easy separation regeneration and easy newlinehandling Though the zeolites are known for its catalytic activity in the newlinechemical transformations like oxidation and alkylation reactions it poses newlinediffusional constraints for the processing of larger molecules Hence in the newlinerecent years fundamental and industrial demands have meant that newlineconsiderable effort has been devoted in expanding the pore size range of wellordered newlinezeotype materials in the mesoporous range The past decade has newlinesuccessfully fabricated porous materials with ordered structures for the newlineapplication of chemical transformations A lot of work has been devoted to newlinethe understanding catalytic properties of the mesoporous materials through newlinevarious physicochemical techniques newline newline