| 摘要 |
A method for preparing alkylhalogenosilane by reacting alkyl halide with a solid contact mass consisting of silicon and catalyst system which comprises (a) a copper catalyst and (B) a group of promoter additives containing a B1 additive selected from a metallic zinc, a compound based on zinc and the species thereof, a B2 additive selected from a tin, a compound based on tin and the species thereof, optionally a B3 additive selected from caesium, potassium, rubidium, phosphorus, a compound derived form said metals/metalloids and the mixtures thereof, wherein the inventive method is characterised in that the copper catalyst (a) is embodied in the form of cuprous halide balls having a sphericity factor ranging from 0.6 to 1, a particle size distribution whose D50 value ranges from 50 to 1500mum, a porous texture equal to or less than 0.2 ml/g for a pore diameter ranging from 0.1 to 10mum and a pourability equal to or greater than 8.
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