Synthesis and characterization of Mcm 41 and its supported catalysts Their application to fine chemical Synthesis

Abstract

newlineCatalysts are indispensable components for majority of chemical and newlinebiological processes The forefront of research in catalysis is the design and newlinedevelopment of newer molecular sieves for applications as heterogeneous newlinecatalyst Of late zeolites are the most widely used catalysts in industries newlineThese crystalline microporous aluminosilicates have become extremely newlinesuccessful as catalyst in oil refining and petrochemistry for the production of newlinefine and speciality chemicals Brönsted acid sites are present in the catalyst as newlinea bridged hydroxyl group which are responsible for the catalytic activity in newlinemany reactions such as cracking alkylation cylation cyclization newlinecondensation oxidation reduction isomerization disproportionation newlinepolymerization esterification protection de protection and acetalization etc newlineCrystalline aluminophosphate molecular sieves have been reported in the newlineliterature as contemporaneous to zeolites The catalytic properties of these newlinemolecular sieves can be controlled by the incorporation of transition metal newlineions with specifically tailored catalytic applications These microporous solid newlineacid catalysts have been the most exploited materials for catalytic newlineapplications newline newline