Production of Organosilane by The Direct Reaction of Silicon with Methyl Chloride


The aim of this work is to study the production of organosilane by thecatalytic reaction of Methyl chloride (CH3Cl) with silicon (Si) and using copper(Cu) as catalyst in a fluidized bed reactor. Gas chromatographic (GC) techniquewas used on-line for analysis of the reacted gas.The experimental work was carried out using columns with dimensions 5 cminternal diameter and 50 cm height stainless steel used as a fluidized bed reactor.Gas distributor was fitted at the bottom of column with 25 holes of 0.1cm holediameter.The reaction started with experiments at different bed temperatures (200-400) oC and the catalyst used is only copper (Cu) in two different percent (10 %and 15 % of the silicon) in order to anticipate the optimum temperature andcatalyst value required for the best conversion of organosilane, these twovariables were kept constant for the remaining experiments.Experiments were performed to reflect the effect of each of these variables:particle diameter, bed height and reacted gas velocity on the organosilaneproduction. It was found that organosilane conversion was the highest at 350 oCand 15% copper. The gas velocity at a value little more than minimumfluidization velocity is gave better conversion than low velocity that gave fixedbed or high velocity and that gave turbulent fluidization, higher level of contactmass, and finally higher particle diameter this gives homogenous fluidizationconcerning the reacted gas velocity.