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以甲基氢二氯硅烷、氯苯为原料,氯仿为催化剂,采用气相催化缩合法合成了甲基苯基二氯硅烷,并通过气相色谱分析得到了产物的收率和选择性。详细探讨了反应温度、反应压力、停留时间对收率和选择性的影响。结果表明,气相催化缩合法合成甲基苯基二氯硅烷的最佳工艺条件为:反应温度600℃,反应压力p≥0.5 MPa(表压),停留时间46.9～70.4 s。以质量分数0.56%的氯仿为催化剂,当反应温度为600℃,反应压力(表压)为0.7 MPa,停留时间为56.3 s,实验室得到的最高产物收率达32.8%,产物选择性为34.3%。
Using methylhydrogen dichlorosilane and chlorobenzene as raw materials and chloroform as catalyst, methylphenyldichlorosilane was synthesized by gas-phase catalytic condensation and the yield and selectivity of the product were obtained by gas chromatography analysis. The effects of reaction temperature, reaction pressure and residence time on the yield and selectivity were discussed in detail. The results showed that the optimum conditions for the synthesis of methylphenyl dichlorosilane by gas - phase catalytic condensation were as follows: reaction temperature 600 ℃, reaction pressure p ≥ 0.5 MPa (gauge pressure), residence time 46.9 ~ 70.4 s. When the reaction temperature was 600 ℃, reaction pressure (gauge pressure) was 0.7 MPa and residence time was 56.3 s, the highest yield of product in laboratory was 32.8% and the product selectivity was 34.3 %.