Patent ID: 8030510
Filing Date: 2011-10-04
Classification: C07F

Abstract:
1. A process for the preparation of alkylhalosilanes comprising reacting an alkyl halide with a solid body, formed of silicon and of a catalytic system comprising (α) a copper catalyst and (β) a group of promoter additives comprising: at least one additive β1 selected from the group consisting of metallic zinc, and a zinc-based compound, at least one additive β2 selected from the group consisting of tin, and a tin-based compound, optionally at least one additive β3 selected from the group consisting of: halides carboxylates, formates, and acetates of cesium, potassium, and rubidium; phosphorus; metal phosphides; calcium phosphide; silicon phosphide; phosphorous-based compounds capable of forming metal phosphides; copper-phosphorous alloys; copper phosphide; and mixtures thereof, wherein the copper catalyst (α) is in the form of cuprous halide beads, said beads exhibiting the following specifications: (i) a sphericity factor which lies within the range from 0.6 to 1; (ii) a particle size distribution where the value of D (iii) a porous texture which is equal to or less than 0.2 ml/g for a pore diameter ranging from 0.1 to 10 μm; and (iv) a flowability which is equal to or greater than 8.