甲基磺酸亚锡合成反应动力学研究

Reaction Kinetics of the Synthesis of Stannous Methanesulfonate

对甲基磺酸和金属锡粒合成甲基磺酸亚锡新工艺的反应表观动力学进行了研究．考察了不同温度下甲基磺酸浓度随时间的变化率，结合阿累尼乌斯公式采用最小二乘法处理实验数据，得到了不同温度下的该反应的表观反应动力学速度常数和表观活化能．结果表明，甲基磺酸与金属锡生成甲基磺酸亚锡的化学反应是液-固相表面反应，属于零级反应．在393．15-423．15K范围内，该反应的表观活化能为27．02kJ·mol^-1．

A new process, in which high-pure tin methanesulfonate is produced by the reaction of Sn with methanesulfonic acid, was studied on the apparent kinetics of this reaction under the optimum condition in this paper. The relationship between the the molarity change of methanesulfonic acid and time was reviewed under different temperature, and the apparent reaction velocity constants under different temperature were calculated. Then apparent activa- tion energy of this reaction was calculated with Arrhenius equation. The results show that the replacement reaction between methanesulfonic acid and stannum to produce stannous methanesulfonate is the liquid - solid phases surface reaction, and this reaction is zero order reaction, the reaction rate is just affected by the reaction temperature, and in the temperature range of 393.15 K - 423.15 K, the apparent activation energy of this reaction is 27.02 kJ·mol^-1.