连续反应釜中γ-十一内酯合成宏观动力学研究

摘要

研究了γ-十一内酯合成过程中包含可逆的主反应和丙烯酸聚合副反应的宏观动力学,为提高反应选择性提供了动力学依据.实验在连续操作的釜式反应器中进行,考察不同温度、不同进料流量条件下反应速率,利用实验数据对模型进行参数拟合,得到主反应和副反应动力学参数,经统计检验和残差分析表明,所建立的动力学模型可靠,可用于宏观描述该反应.研究结果证明:提高反应温度,降低丙烯酸浓度有利于提高主反应选择性、提高γ-十一内酯收率.%Macrokinetics of reversible main reaction and acrylic polymerization side reaction were studied and the model was established to provide the kinetic basis for improving the reaction selectivity.Experiments were carried out in a continuously operated kettle reactor and the reaction rates were measured at different temperatures and different feed rates.The parameters of the model were fitted with experimental data to obtain the main reaction and the side reaction kinetics parameters.Statistical tests and residual analysis showed that the established kinetic model was reliable and can be used to describe the reaction macroscopically.The results showed that increasing the reaction temperature and decreasing the concentration of acrylic acid were beneficial to improve the selectivity of the main reaction and improve the yield of γ-undecalactone.