Аңдатпа
The Kalamkas deposit’s oil and its distillation products were studied, and research results on residues and road grade bitumen compositions obtained by oxidation of heavy oil residuest are presented. The atmospheric residue of Kalamkas oil (350 Со) was subjected to vacuum distillation with the selection of gas oil fractions boiling to 380, 400 and 420 Со. Samples of residues were subjected to oxidation in a laboratory installation, which is a batch cube at constant operating conditions. The residues from different depths of gas oil fractions are characterized by different group chemical compositions. The group composition of the residues changes, the content of paraffinnaphthenic hydrocarbons decreases from 29.4 to 23.3% wt. and the proportion of heavy aromatic hydrocarbons increases from 26.8 to 27.8% wt. The content of asphaltenes (from 7.7 to 12.4% wt) and resins (from 17.4 to 22.5% wt) also increases. The ratio of asphaltenes and resins increases from 0.44 to 0.55. With an increase in the depth of selection of gas oil fractions to 420°C, the degree of aromaticity, the ratio of the amount of aromatic hydrocarbons to paraffin-naphthenic ones, increases to 1.79. Road grade bitumens produced from the vacuum distillation residues of Kalamkas oil fuel oil using direct oxidation technology of raw materials have the best performance characteristics if they are obtained from residues boiling in the range of 380–400°C. Residues boiling above 380-400 Со can serve as raw materials for the production of oxidized road bitumen of BND70/100 grade according to ST RK 1373 - 2013.