刘作华,冉启诚,宁伟征,孙大贵,陶长元,刘仁龙,牟天明

• 1:重庆大学化学化工学院
• 2:重庆化医控股(集团)公司

摘要(Abstract)：

1,3-二氯-2-丁烯(DCB)的氯化过程同时存在加成反应、取代反应和连续反应,DCB与氯气混合不均匀和反应热移除效果不佳会降低取代氯化的选择性。搅拌槽内流场分布特征与流体的混合效果、化学反应的转化率和选择性等密切相关,调控流场结构有助于强化DCB的氯化行为。文中结合搅拌器专用计算流体动力学软件MixSim 2.0.2,模拟了在偏心射流条件下4 cm二直叶桨式搅拌器、4 cm斜叶圆盘搅拌器和5 cm斜叶圆盘搅拌器槽内的流场分布特征,并进行了DCB氯化实验。研究表明:偏心射流能改变流场分布,控制流场的拟序结构,强化混合效果。在偏心斜射流的条件下,5 cm斜叶圆盘搅拌器的氯化效果较优,能够使DCB氯化的主产物2,3,4-三氯-1-丁烯(TCB)的收率提高到87.9%。

关键词(KeyWords)： 偏心射流;搅拌槽;流场;1,3-二氯-2-丁烯;氯化

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(20806095);; 教育部留学回国人员科研启动基金项目(20091341-2)

作者(Author): 刘作华,冉启诚,宁伟征,孙大贵,陶长元,刘仁龙,牟天明

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