Catalytic Epoxidati on of Cyclooctenew ith Vana dium-oxo- Sulphate Support ed on Am in Functio nalized Nano-Boehmite

Supported metal complexes as heterogeneous catalys t have been used extensively for a wide variet y of application. In these system s, the most important phenomenon is the catalyst elucidation from the support which will be overcom e by use of covalent bonding of metal complexes to the f unctionaliz ed support.Meth ods:Hydrothermal assisted sol-gel derived n ano-boehmite with high surface ar ea (۳۲۶m۲/g) and high d egree of surface hydroxyl groups [۱, ۲], was used in this research. ۱ g nano-boehmite was refluxed wit h ۰.۳۵mmol ۳-(tri-meth oxysilyl)pr opyl amine in toluene for ۲۴hr(AF NB). Then ۱.۰۵mmol V anadium-ox o-sulphate was support ed on AFNB by refluxing in ethanol for ۷ hours. This supported catalyst was used in epoxidatio n of ۰.۷mmol cis-cyclooctene and yields of pro ducts were investigated by GC. T he catalytic procedure was optimi zed for different parameters such a s amount of catalyst ( ۵-۳۰mg), solvent (۱-۳ml), oxidant (۰.۲۸-۱.۶۸mmol), temperature (۲۵-۸۰ºC) and tim e (۳۰-۱۸۰m in).

کلیدواژه ها:

Sol-g el method ، N ano-Boehm ite ، Heterogeneous catalyst ، Epoxidation of alke nes