Activity, selectivity and stability of metallosilicates containing molybdenum for the epoxidation of alkenes

Microporous metallosilicates containing various transition metals have been prepared by the acid-catalyzed sol–gel process. The catalytic activity of the materials has been tested for the epoxidation of cyclooctene with tert-butyl hydroperoxide. Silicates containing molybdenum showed high activities...

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Bibliographic Details
Published in:Journal of molecular catalysis. A, Chemical Chemical, 2001-01, Vol.165 (1), p.149-158
Main Authors: Arnold, Ulrich, Serpa da Cruz, Rosenira, Mandelli, Dalmo, Schuchardt, Ulf
Format: Article
Language:English
Subjects:
Catalysis
Catalytic reactions
Chemistry
Epoxidation
Exact sciences and technology
General and physical chemistry
Metallosilicates
Molybdenum
Sol–gel process
tert-Butyl hydroperoxide
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
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Summary:Microporous metallosilicates containing various transition metals have been prepared by the acid-catalyzed sol–gel process. The catalytic activity of the materials has been tested for the epoxidation of cyclooctene with tert-butyl hydroperoxide. Silicates containing molybdenum showed high activities and epoxide selectivities. The catalytic activities of catalysts prepared with molybdenyl acetylacetonate as metal precursor are mainly due to metal leached into the homogeneous phase. A catalyst for the heterogeneous phase epoxidation was obtained, using Mo(V)isopropoxide as metal precursor. This catalyst was tested in the epoxidation of various alkenes and conversions increase in the order 1-decene≈α-pinene
ISSN:1381-1169
1873-314X
DOI:10.1016/S1381-1169(00)00408-8