Abstract
WHITE1 has shown that dimethyldioctadecyl ammonium bentonite is particularly suitable as a stationary phase for the chromatographic separation of aromatic and aliphatic compounds, while Hughes, White and Roberts2 have shown that this material is equally suitable for the separation of isomeric xylenes, toluidines and cresols. Further work by Cowan and White3 has shown that similar organo-clay complexes are adsorbents for phenols, the adsorbents showing widely differing specificity for the various isomers, and from the data presented the authors propose that the electronic transitions occurring within the sorbate molecules are the main contributory forces governing the extent of adsorption. In consequence, the use of organo-clay complexes for separating isomeric compounds is particularly appropriate and a further example, the separation of dichlorobenzenes, has been investigated and the results obtained compared with those for a conventional liquid stationary phase.
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