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Thermodynamics of Solvent Selectivity in Extractive Distillation of Hydrocarbons by J. M. Prausnitz; Ralph Anderson is a Engineering article available to read on EtoBox.

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## Abstract The selectivity of a polar solvent is expressed in terms of an approximate theory of solutions. The theoretical results are insufficiently precise for the accurate prediction of activity coefficients, but the analysis shows that in the absence of chemical effects selectivity depends primarily on the difference in molar volumes of the hydrocarbons to be separated and on the polar energy density of the solvent. The effectiveness of a solvent is related to its polarity (which should be large) and to its molecular size (which should be small). In cases where chemical effects are important or where the molar volumes of the hydrocarbons to be separated are only slightly different, selectivity also depends on the relative ability of the hydrocarbons in acting as electron donors and on the ability of the solvent to act as an electron acceptor in forming acid‐base complexes. The theoretical conclusions, which are based on modern thermodynamics and on the theory of intermolecular forces, are in agreement with experimental observations. The results obtained in this work provide theoretical criteria for the selection of an optimum solvent for a given separation and give semiquantit

Who reads Thermodynamics of Solvent Selectivity in Extractive Distillation of Hydrocarbons?

Author

J. M. Prausnitz; Ralph Anderson

Publisher

Wiley

Published

1961

Language

EN

Field

Engineering (Physical Sciences)