Process for preparing trimethylaluminum

摘要

A process for making trimethyl aluminium comprises: (a) reacting a trialkylaluminium having at least 2C alkyl gps. with a methyl halide, opt. in the presence of an alkyl exchange catalyst, under conditions to form a prod. mixt. which contains trimethylaluminium and dimethylaluminium halide; and (b) fractionally distilling trimethylaluminium from the prod. mixt. in the presence of trialkylaluminium having at least 2C alkyl gps. to convert at least a portion of the dimethylaluminium to trimethylaluminium. Also claimed is a process for making trimethylaluminium comprising using a bismuth catalyst.