2493.     O’CONNOR, B.  Silica-Gel Percolation.  Ind. Eng. Chem., vol. 40, 1948, p. 2102-2103; Chem. Abs., vol. 43, 1949, p. 1169.

        Discusses use of silica-gel percolation in studying the types of compounds present in the products of the Fischer-Tropsch synthesis.  The compounds of similar boiling point are separated according to their adsorption affinity with silica gel, which increases in the order of paraffins, olefins, aromatics, and oxygenated compounds.  The differentiation of the 2 latter compounds is improved by using an azo dye.

        ODE, W. H.  See abs. 3159.