Abstract
This article reports on an investigation which used a combination of chromatographic, chemical, and spectroscopic methods to determine the chemical composition of mono-, bi-, and tricyclic aromatic hydrocarbons with small amounts of cyclic thiostructures. Test samples of petroleum asphalts were deasphalted with n-hexane, and the malthenes that were obtained (5 g) were separated into fractions by gradient displacement chromatography in a preparative liquid chromatogram. The obtained light aromatic hydrocarbon fractions were analyzed to determine their molecular weight (cryoscopic), elemental composition, and density. It is determined that the efficiency of the chromatographic separation depends on the component structure of the asphalt. The results indicate that the adsorption activity of the hydrocarbons increases with increasing number of aromatic bonds in the molecule and decreases when an aliphatic substituent is introduced or the side chain is lengthened.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
