Abstract: Separation of cinnamaldehyde and cinnamyl acetate by thin-film evaporation/molecular distillation coupled technology was studied. Based on the experimental results of separating cinnamaldehyde and cinnamyl acetate by molecular distillation，a novel separation method by thin-film evaporation/molecular distillation was investigated. For separation of cinnamaldehyde and cinnamyl acetate with the coupled method，the effect of reflux ratio was discussed firstly. Then，the mixtures with different mass fractions of cinnamaldehyde were separated at various evaporator temperatures under the optimum reflux ratio of 2∶1. The content of cinnamaldehyde in distillate obtained by thin-film evaporation/molecular distillation was generally higher than that obtained by molecular distillation only for the same mixtures，which indicated higher separation efficiency of thin-film evaporation/molecular distillation coupled technology than molecular distillation in the case of separating materials with similar volatilities.

Key words: molecular distillation, thin-film evaporation, coupling, cinnamaldehyde, cinnamyl acetate

摘要： 采用分子蒸馏技术和薄膜蒸发与精馏耦合技术分离肉桂醛和乙酸肉桂酯。在采用分子蒸馏分离肉桂醛和乙酸肉桂酯的实验研究基础上，重点阐述了薄膜蒸发与精馏耦合技术分离实验。首先研究了回流比对分离效果的影响，在确定回流比为2∶1后，分别以不同肉桂醛质量分数的混合物作为待分离物料，在不同蒸发器温度下进行了分离实验。对于具有相同肉桂醛质量分数的混合物料，薄膜蒸发与精馏耦合技术收集的馏出物中肉桂醛的含量普遍高于通过分子蒸馏技术收集的馏出物中肉桂醛的含量，实验结论表明薄膜蒸发与精馏耦合技术在分离挥发性相似物料方面具有更高的分离效率。

关键词: 分子蒸馏, 薄膜蒸发, 耦合, 肉桂醛, 乙酸肉桂酯