A New Algorithm for the Determination of Product Sequences in Azeotropic Batch Distillation

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• 作者：Laszlo Hegely ; Peter Lang
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2011
• 出版时间：November 16, 2011
• 年：2011
• 卷：50
• 期：22
• 页码：12757-12766
• 全文大小：958K
• 年卷期：v.50,no.22(November 16, 2011)
• ISSN：1520-5045

文摘

In multicomponent azeotropic mixtures (e.g., waste solvents), the products obtainable by batch distillation and their maximal amount is highly dependent on the charge composition. A method is presented for the determination of product sequences for any number of components based only on the temperatures of pure components and azeotropes, and azeotropic compositions, without the knowledge of further VLE data. The method is suitable for heteroazeotropes and for taking pressure change into consideration, as well. The stability of fixed points is determined with the assumption that Serafimov topological class of the mixture occurs in Reshetov鈥檚 statistics. On the basis of the stabilities, we enumerate all feasible product sequences using the algorithm of [Ahmad, B. S.; Zhang, Y.; Barton, P. I. Product Sequences in Azeotropic Batch Distillation. AIChE Journal1998, 44, 5, 1051鈥?070.]. Finally, the relative amount of cuts are determined assuming maximal separation for the given charge composition. The results are presented for the systems acetone鈥揷hloroform鈥搈ethanol鈥揺thanol鈥揵enzene and methanol鈥搕etrahydrofuran鈥揺thyl acetate鈥揺thanol鈥搃sopropyl alcohol鈥搘ater.