Asphaltene substances of oil are characterized via the methods of extraction, adsorption chromatography, chemical degradation, and chromatography-mass spectrometry. The data on the structure of the high- and low molecular weight asphaltenes of methane-naphthene oils and composition of the compounds adsorbed/occluded by their molecules are presented. These investigations are important for the development of efficient petroleum technologies.

Topics
Petroleum, Asphaltene, Mass spectrometry, Organic compounds, Chromatography
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