Home – Home – Jornals – Chemistry for Sustainable Development 2016 number 6

The distribution and the composition of nitrogen-containing bases in heavy oil of the Usinsk deposit and its resinous components were studied. It was determined that resins of the Usinsk oil accumulated more than half of basic nitrogen contained in it. Nitrogen containing bases of oil and its resinous components are presented by high and low molecular compounds. Bases with various molecular masses were isolated using precipitation methods with hydrogen chloride and sulphuric acid extraction. The resulting concentrates were studied by structural group analysis and gas chromatography-mass spectrometry methods. It was demonstrated that middle molecules of nitrogen bases of oil and resins were composed of polycyclic nuclei including aromatic and saturated cycles with various alkyl framing. Naphthenic rings make the main contribution to the cyclicity of their middle molecules. Middle molecules of resins bases are notable by a more pronounced naphthenic nature and developed alkyl substitution. Quinoline, benzo-, and dibenzoquinoline alkyl derivatives are present in the composition of low molecular weight nitrogen bases of oil and resins, in the composition of high molecular mass - benzo- and dibenzoquinoline and azapyrene alkyl derivatives. The compounds identified are mainly presented by alkylbenzoquinolines, the qualitative composition of which practically does not depend on the nature and the molecular mass of the sample under study.