Dehydration of a Dilute Acetic Acid‐Water Mixture via Batch Heteroazeotropic Distillation,Chemical Engineering & Technology

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Dehydration of a Dilute Acetic Acid‐Water Mixture via Batch Heteroazeotropic Distillation
Chemical Engineering & Technology ( IF 1.8 ) Pub Date : 2020-12-29 , DOI: 10.1002/ceat.202000367
Hao Gao ₁ , Fei Zhao ₁ , Lingyan Zhu ₁ , Fan Yang ₁ , Yaqian Wang ₁ , Dongbing Li ₁

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Dehydration via batch heteroazeotropic distillation emerges as a promising technology for the recovery of acetic acid (HAc) from dilute aqueous solutions. In this preliminary work, this process was studied with the aid of Aspen Batch Modeler®, using an acetic acid aqueous solution as the model feed instead of wood vinegar from biorefineries and n‐butyl acetate as the azeotropic entrainer. The non‐random two liquids (NRTL)‐virial Hayden‐O'Connell model (HOC) model was chosen to calculate the thermodynamic properties. The response surface methodology with Box‐Behnken design was successfully applied to obtain optimum process conditions, providing a dehydrated HAc product from the pot with high purity and recovery.

中文翻译：

间歇共沸蒸馏法对稀乙酸-水混合物进行脱水

通过分批共沸蒸馏进行脱水是一种从稀水溶液中回收乙酸（HAc）的有前途的技术。在这项初步工作中，借助Aspen BatchModeler®研究了此过程，使用乙酸水溶液作为模型进料，而不是生物精炼厂的木醋，而乙酸正丁酯作为共沸夹带剂。选择非随机两种液体（NRTL）-病毒性Hayden-O'Connell模型（HOC）模型来计算热力学性质。采用Box-Behnken设计的响应面方法已成功应用于获得最佳工艺条件，从而使锅中的脱水HAc产品具有高纯度和高回收率。

更新日期：2021-02-19

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