The direct synthesis of methylchlorosilanes by reacting metallic silicon with methyl chloride in the presence of a copper catalyst yields low-boiling component,high-boiling component and methyltrichlorosilane as by-pr...The direct synthesis of methylchlorosilanes by reacting metallic silicon with methyl chloride in the presence of a copper catalyst yields low-boiling component,high-boiling component and methyltrichlorosilane as by-products. The proposed process for prepares monosilanes from the HBC fraction by reacting it with hydrogen chloride in the presence of an amine or amide catalyst. The conversion of disilanes into monosilanes is above 80% in general and the best is 86%.A method is also proposed for preparing dimethyldichlorosilane from methyltrichlorosilane,reacting simultaneously with the LBC components having a high content of methyl groups and with the HBC non-cleavable components,in the presence of a catalyst,in which the best conversion is 66.2%,and the best content of dimethyldichlorosilane in final products is 46.4%.展开更多
本文采用高效液相色谱法,以甲醇+水为流动相,使用CAPCELL PAK C18(5μm)不锈钢柱,二极管阵列检测器,在220nm波长下对叶菌唑原药进行分离和定量分析。结果表明,该分析方法的线性相关系数为0.999 8;标准偏差为0.24;变异系数为0.25%;平均...本文采用高效液相色谱法,以甲醇+水为流动相,使用CAPCELL PAK C18(5μm)不锈钢柱,二极管阵列检测器,在220nm波长下对叶菌唑原药进行分离和定量分析。结果表明,该分析方法的线性相关系数为0.999 8;标准偏差为0.24;变异系数为0.25%;平均回收率为99.84%。展开更多
文摘The direct synthesis of methylchlorosilanes by reacting metallic silicon with methyl chloride in the presence of a copper catalyst yields low-boiling component,high-boiling component and methyltrichlorosilane as by-products. The proposed process for prepares monosilanes from the HBC fraction by reacting it with hydrogen chloride in the presence of an amine or amide catalyst. The conversion of disilanes into monosilanes is above 80% in general and the best is 86%.A method is also proposed for preparing dimethyldichlorosilane from methyltrichlorosilane,reacting simultaneously with the LBC components having a high content of methyl groups and with the HBC non-cleavable components,in the presence of a catalyst,in which the best conversion is 66.2%,and the best content of dimethyldichlorosilane in final products is 46.4%.
