Gaschromatographisehe Untersuchung einiger Systeme aus Tonmineralien und organischen Stoffen |
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| Authors: | Dr Carl E Legate Dr William D Johns |
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| Institution: | (1) Shell Oil Co., Wood River, Illinois, USA;(2) Department of Earth Sciences Washington University, St. Louis, Missouri, USA |
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| Abstract: | Gas chromatographic studies of simple organic -montmorillonite systems were carried out over the temperature range 40–90° C. Experimentally derived heats of absorption and relative activity coefficients indicate that the polar group of compounds studied exhibits organic-silicate interaction over the entire temperature range. The chromatographic separation of a group of non-polar hydrocarbons is most effective over the temperature range 40–70° C, when a layer of adsorbed water is present between silicate sheets. In this case organic-water interactions are important and the chromatographic separation is largely dependent upon relative solubility of hydrocarbons in the adsorbed water. Over the temperature range 70–90° C chromatographic separation of the hydrocarbons is effected by organic-silicate interactions in the absence of adsorbed water. It is suggested that these processes are in principle effective in natural sedimentary columns.
Herrn Prof. Dr.Carl W. Correns zum 70. Geburtstag gewidmet. |
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