Abstract: Disclosed is a method for lowering the residual halide content in alkoxysilanes. The method comprises contacting the alkoxysilane having residual halide content with activated carbon followed by separation of the alkoxysilane. The resultant materials are useful as intermediates for the preparation of other chemical compounds and for use in electronics applications.

Abstract: A method of preparing an alkoxysilane having reduced halide content. The method comprises contacting a mixture comprising an alkoxysilane and residual halide with a mixture comprising about 1.5 to 15 moles of an alkyl alcohol per mole of residual halide, the alkyl alcohol comprising 1 to about 4 carbon atoms and about 0.1 to 5 moles of an orthoformate per mole of residual halide, to form a mixture comprising additional alkoxysilane and lower boiling species, and separating the lower boiling species and the alkoxysilane. Remaining residual halide may be contacted alkali metal to further reduce the halide content. Alkoxysilanes are useful as catalyst modifiers to manufacture polypropylene.