New algorithm for the determination of product sequences of batch azeotropic and pressure swing distillation

Abstract

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 boiling points of pure components and azeotropes, and azeotropic compositions, without the knowledge of further VLE data. The method is suitable for heteroazeotropes and pressure swing distillation as well. The results are presented for the system acetone-chloroform-methanol-ethanol-benzene with and without pressure change, as well.