Preparing trialkylmetal compounds comprises reaction of metal trichloride with alkylaluminum sesquichloride in the presence of alkali metal halide as auxiliary base, heating the reaction mixture, and separating trialkylmetal compound

摘要

Preparing trialkylmetal compounds comprises: (a) reaction of metal trichloride with alkylaluminum sesquichloride in the presence of at least one alkali metal halide as auxiliary base; (b) heating the reaction mixture to a temperature above 120[deg] C and separation of the trialkylmetal compound from the reaction mixture via a separator, with partially alkylated products; and (c) heating the reaction mixture to a temperature in the range from 165[deg] C to 350[deg] C and separation of the remaining trialkylmetal compound and the partially alkylated products from the reaction mixture. Preparing trialkylmetal compounds of the general formula R 3M comprises: (a) reaction of metal trichloride (MCl 3) with alkylaluminum sesquichloride (R 3Al 2Cl 3) in the presence of at least one alkali metal halide as auxiliary base; (b) heating the reaction mixture to a temperature above 120[deg] C and separation of the trialkylmetal compound (R 3M) from the reaction mixture via a separator, with partially alkylated products of the type MCl xR y being recirculated to the reaction mixture; and (c) heating the reaction mixture to a temperature in the range from 165[deg] C to 350[deg] C and separation of the remaining trialkylmetal compound (R 3M) and the partially alkylated products (MCl xR y) from the reaction mixture. M : metal of group IMA of the Periodic Table of the Elements (PTE); R : 1-5C-alkyl, preferably methyl or ethyl; and x, y : 1 or 2, where x + y equals 3.