CHARACTERISTIC STRUCTURAL FEATURES OF ASPHALTENE MACROMOLECULES IN HEAVY CRUDE OIL FROM THE USINSK FIELD

摘要

We have studied the structure of asphaltenes in heavy crude oil according to a flow chart eliminating the step of their thermal degradation and proposing separation of asphaltenes into high molecular weight components, "low molecular weight asphaltenes, " and malthenes. The elemental composition of the isolated components is determined. We have used chromatography/mass spectrometry to study the composition of poly cyclic aromatic hydrocarbons and heteroatomic malthene compounds contained in the asphaltenes.