RESEARCH STUDY OF PHYSICOCHEMICAL TECHNIQUES FOR THE PURIFICATION OF ORGANIC COMPOUNDS
APPLIED SCIENCE LABS INC STATE COLLEGE PA
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Comparison of rate results from one film to another in terms of the nature of the permeating molecule and its interaction with the film can be made using a parameter called rate factor RF. RF RR sub NH, where R is the measured rate of any particular permeant and R sub NH the rate for neohexane 2-2-dimethylbutane through the same kind of film under the same conditions. The measurement of neohexane rates for various combinations are cited. Rate determinations were made for pentane, hexane, heptane, decane, and tridecane through polypropylene and ethanol, butanol, hexanol, and heptanol through cellulose acetate. Results for both groups approximated a linear log rate versus C number relationship. Five binary tests were made for a vinyl chlorideacetate film 2 resulted in almost immediate film failure.