Support properties of silica supported catalysts and their use in olefin metathesis

摘要

Silica supports having a surface area from about 250 m²/g to about 600 m²/g and an average pore diameter from about 45 Å to about 170 Å, used for supported tungsten catalysts, improves the activity of the resulting catalyst (i.e., its conversion level at a given temperature) for the metathesis of olefins, without compromising its selectivity to the desired conversion product(s). Exemplary catalysts and processes include those for the production of valuable light olefins such as propylene from a hydrocarbon feedstock comprising ethylene and butylene.