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Article | REF: J2612 V1

Distillation of non-ideal mixtures

Authors: Vincent GERBAUD, Ivonne RODRIGUEZ-DONIS

Publication date: September 10, 2010, Review date: March 1, 2015

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7. Conclusions

Separation of a non-ideal A-B mixture usually requires the addition of a carrier E to the feed (azeotropic distillation) or continuously (extractive distillation). In order to increase the driving force of the separation, the selectivity of the carrier must be as far away from 1 as possible. It is evaluated by the ratio of the activity coefficients or relative volatilities of A and B at infinite dilution in E, or preferably

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