Distribution of colloidal system of detergent additives for lube oils in chromatography on silica gel

This paper reports on a study of the behavior of the colloidal system of samples of calcium sulfonate and alkylsalicylate additives in liquid column chromotographic (LCC) separation by the method of so-called development in the column. The LCC separation was performed in an eight section column, IR spectra, and photomicrographs were taken of the various fractions of chloroform, methanol, and hexane, in LCC and LMC separation. As a result of the molecular adsorption of the silica gel, there is a vertical redistribution of concentrations in the columns and a separation of groups of substances of the dispersion media of the additive. These studies show that it is feasible to use activated silica gel for a comparative characterization of the weight distribution of colloidal particles in basic sulfonate and alkylsalicylate additives.