Abstract
The equation describing retention on a combined sorbent containing a solid adsorbent and a stationary liquid phase (SLP) have been obtained on the basis of a theory of retention developed earlier. Experimental methods have been proposed for estimating the relative roles of dissolution and adsorption for combined sorbents based on organo—clays. The distribution coefficients of C 6C 10 hydrocarbons between a carrier gas and an SLP layer, SLPL surfaces, a solid support and organo-vermiculite, and SLP—solid support and SLP—organo—vermiculite interfaces have been determined. The selectivity of adsorption in the separation of the pairs benzene—cyclohexane and m-xylene— p-xylene has been studied for sorbents containing pure and impregnated organo—vermiculites. It has been shown that the selectivtiy depends on the polarity of the SLP.
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