METHOD OF MAKING ROAD ASPHALT Russian patent published in 2009 - IPC C10C3/04 C08L95/00 

FIELD: chemistry; construction.

SUBSTANCE: asphalt is obtained from atmospheric oxygen oxidation of a mixture of asphaltite from propanoic deasphalting of tar with an additive. The additive is chosen from a group comprising: heavy gas oil from catalytic cracking, slop (heavy straight-run gas oil, 470-520°C fraction), residual extract from selective oil purification, in quantity of 1-10 wt % of oxidation raw material. The oxidation mixture is brought to 70-80°C temperature, and the oxidation product is compounded with tar in the ratio 30-35 wt %: 65-70 wt % respectively, obtaining the end product.

EFFECT: high quality road asphalt, more cost effectiveness and improvement of ecological factors of oil refining.

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