Composition of asphaltenes of heavy oil residues from the Usinskoye oil field

A comparative study of the composition and structure of asphaltenic components of fuel oil and heavy naphthenic-aromatic oil is carried out. The similarities and differences of their structural-group composition, the composition of fragments bound in molecules of asphaltenes through ether and sulfide bridges are revealed. It is shown that the effect of temperature results in the lower content of compounds in the products of the C–S and C–O bond cleavage. The differences revealed are most likely due to the changes in molecular architecture of the initial asphaltenes. A comparative analysis of the compounds identified shows that most of them are bound through sulfide bridges. It can be assumed that most of the ether bridges located on the periphery of molecules of asphaltenes broke the first in the course of fuel oil production. Sulfide bonds are in the core of asphaltenes.A comparative study of the composition and structure of asphaltenic components of fuel oil and heavy naphthenic-aromatic oil is carried out. The similarities and differences of their structural-group composition, the composition of fragments bound in molecules of asphaltenes through ether and sulfide bridges are revealed. It is shown that the effect of temperature results in the lower content of compounds in the products of the C–S and C–O bond cleavage. The differences revealed are most likely due to the changes in molecular architecture of the initial asphaltenes. A comparative analysis of the compounds identified shows that most of them are bound through sulfide bridges. It can be assumed that most of the ether bridges located on the periphery of molecules of asphaltenes broke the first in the course of fuel oil production. Sulfide bonds are in the core of asphaltenes.