Background and Overview
Trimethylchlorosilane is an organic intermediate that can be used to produce various organic silicon compounds.
Application [1-6]
A method for generating dimethyl dichlorosilane through disproportionation reaction belongs to the technical field of comprehensive utilization of three wastes in the production process of methyl chlorosilane. Its characteristic is that using a mixture of organosilicon monomers, such as methyltrichlorosilane and trimethylchlorosilane, or organosilicon monomers with high and low boiling points, or organosilicon monomers, such as methyltrichlorosilane, trimethylchlorosilane, high boiling points, and low boiling points, as raw materials, the reaction generates dimethyldichlorosilane under the catalysis of catalyst aluminum powder and anhydrous aluminum trichloride alone or in combination. The present invention undergoes a reaction in a high-pressure stirring kettle at 180-350 ℃. During the reaction, the reaction pressure is controlled by the reaction temperature. The higher the reaction temperature, the higher the reaction pressure. The conversion rate of the target product can reach over 70%. The present invention improves the resource utilization level of methyl organosilicon monomer production and produces dimethyl dichlorosilane at a lower cost. Moreover, the operation of the present invention is simple and feasible, suitable for large-scale promotion and utilization.
CN201210187164.0 discloses the preparation process of trimethylsilyl imidazole, which includes the following steps: (1) reaction: first, trimethylmonochlorosilane is added in a stirring kettle, and then imidazole is added in batches under stirring, which is required to be completed within 3 hours; The reaction was carried out under -200~0mm mercury column, and the temperature was controlled below 60 ℃. (2) Distillation: Pour qualified liquid into the distillation tower kettle, extract trimethyl monochlorosilane in the tower at ≤ 92 ℃, and then lower the temperature to extract the product trimethylsilimidazole. This process allows the reaction to proceed at room temperature and reduces the concentration of hydrogen chloride in the system to almost zero, avoiding the occurrence of reactions inhibited by hydrogen chloride. The attached figure is a schematic diagram of the process flow of the present invention.