Date of Award

1969

Degree Type

Thesis

Degree Name

Master of Science (MS)

Author's Department

Chemistry

First Advisor

George L. Cunningham

Abstract

By use of techniques of previous workers for determining liquid-liquid equilibrium and through the use of a circulation still, the complete phase diagram for the partially miscible system, methanol-cyclohexane, was determined. Tile accuracy of earlier liquid-liquid phase data was not improved upon although it was closely approximated. The critical solution temperature was found to be 46.4 degrees C., which is within the range of temperatures reported in earlier measurements.

Activity coefficients of methanol and cyclohexane were calculated from the phase boundaries of the boiling point diagram determined in the present investigation. These activity coefficients were in agreement with the Gibbs-Duhem equation and with the theoretically predicted activity coefficients of the van Laar and Margules equations. Vapor-liquid phase data previously available was limited to the azeotrope boiling temperature reported to be 54.2 degrees C.

Creative Commons License

Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.

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