Vapor‐liquid equilibrium for the benzene‐acetone system

Canjar, Lawrence N.; Lonergan, Thomas E.

doi:10.1002/aic.690020229

Cited by 4 publications

(2 citation statements)

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“…Unfortunately it is very difficult to construct a theory of solutions which simultaneously takes physical and chemical effects into account. One can however profitably examine the problem of solvent selectivity first using one, and then the other ap- The energy of mixing can be divided into two parts: one corresponding to changes in the potential energy which results from the fact that a molecule upon solution experiences a change in For a binary mixture Equations ( 5 ) , ( 6 ) , ( 7 ) , and (8) yield AG', = (xlVl + x2V2) +,4A2 ( 9 ) where A, = cu + cZ2 -2c, = exchange energy per unit volume.…”

Section: Solutions Model For Polar-nonpolarmentioning

confidence: 99%

Thermodynamics of solvent selectivity in extractive distillation of hydrocarbons

Prausnitz

Anderson

1961

AIChE Journal

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P J P O = dimensionless. temperature r. for nonreacting system, = dimensionless velocity, U (r,/p")l'z = dimensionless distance, ( r J p n ) d P 0 Y Subscripts a n d Superscripts b 0 = subscript denoting bulk mean = subscript denoting wall con-conditions ditions -= molal basis = value in reacting systemThe 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 i n the absence of chemical effects selectivity depends primarily on the difference i n molar volumes of the hydrocarbons to be separated and on the polar energy density of the solvent. The effectiveness of o solvent i s related to its polarity (which should be large) and t o i t s molecular size (which should be small). In cases where chemical effects are important or where the molar volumes of the hydrocarbons t o be separated are only slightly different, selectivity olso depends on the relative ability of the hydrocarbons i n acting as electron donors and on the ability of the solvent t o 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 i n agreement with experimental observations. The results obtained i n this work provide theoretical criteria for the selection of an optimum solvent for a given separation and phenomena related to extractive distillation.

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Section: Solutions Model For Polar-nonpolarmentioning

confidence: 99%

Thermodynamics of solvent selectivity in extractive distillation of hydrocarbons

Prausnitz

Anderson

1961

AIChE Journal

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show abstract

“…The ternary convective mass transfer theory developed in Part I is concisely summarized by -N c = k t + (SyzI-yyl) (1) where i takes on the values for which vapor-liquid equilibrium data are available and reduces the uncertainties concerning the mass transfer in the liquid phase. Furthermore the insoluble gas, which will be stagnant, can be readily changed to change the predicted interactions.…”

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confidence: 99%