Masters Theses


"The procuring of experimental vapor-liquid equilibrium data has been a problem of considerable importance to chemical engineers for a number of years. Modern distillation theory and practice have made accurate vapor-liquid equilibrium data practically a necessity.

Using conventional methods for determining vapor-liquid equilibrium data, an experimenter can obtain only a single vapor-liquid equilibrium composition per trial. Ramalho working with Tiller has developed a new method which makes possible the determination of all values of the vapor and liquid concentrations in a single experiment.

The work done by Ramalho indicated that the necessity for very precise temperature measurements presented a serious obstacle but that the method seemed to produce results consistent with the literature for the system methanol-water. It was deemed necessary to modify the method to eliminate the need for precise temperature determinations for the method to become useful. Rather than analyze the mixtures by temperature data, it was decided to use specific gravity or refractive index. A limited amount of work was done by Ramalho toward this end but the data obtained were insufficient for definite conclusions.

The work of this writer is an extension of the modified Ramalho-Tiller method for determination of vapor-liquid equilibrium data. Binary systems are first considered and then the method is extended to include a ternary system. These systems are in all cases systems which have been previously explored and reported. Thus, the method may be checked against the conventional methods of vapor-liquid equilibrium determinations"--Introduction, pages 8-9.


James, William Joseph

Committee Member(s)

Strunk, Mailand R., 1919-2008
Kassner, James L.
Johnson, Charles A.


Chemical and Biochemical Engineering

Degree Name

M.S. in Chemical Engineering


Missouri School of Mines and Metallurgy

Publication Date



72 pages

Note about bibliography

Includes bibliographical references (pages 68-70).


© 1960 David William Bunch, All rights reserved.

Document Type

Thesis - Open Access

File Type




Subject Headings

Vapor-liquid equilibrium -- Mathematical models

Thesis Number

T 1259

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