The samples of naphthenic base hydrocarbon fuel (kerosene fraction) and the samples prepared on their basis at the similar conditions with different degrees of oxidation were investigated. Following the oxidation for each sample reacted with a certain amount of oxygen various physical and chemical parameters were determined. The studies showed a significant effect of natural surfactants on water solubility. The possibility of forming micellar colloidal structures in hydrocarbon fuels with increasing concentrations of natural surfactant-oxidation products was determined. The in-crease in water solubility can result from solubilization of the water molecules inside reverse micelles formed by the oxidation products of hydro-carbon fuels.
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