BITUMEN OBTAINING METHOD Russian patent published in 2012 - IPC C10C3/04 

FIELD: oil and gas production.

SUBSTANCE: method for obtaining bitumen from paraffin-base and high-paraffin-base oils includes fuel oil vacuum refining with obtaining tar, mixing of received tar with raw organic additives that present concentrated polyaromatic hydrocarbons and resins of oil origin, oxidation of obtained mixture by oxygen at increased temperature and excessive pressure, note that fuel oil vacuum refining is done with obtainment of ultra-heavy tar with relative viscosity 180-230 c at 80°C with paraffin-naphthene hydrocarbons content not more than 18 wt %, then ultra-heavy tar is mixed with raw organic additives with obtaining raw composition with relative viscosity 60-110 c at 80°C containing not less than 50 wt % of aromatic hydrocarbons and having the ratio of resins to asphaltene hydrocarbons not lower than 8:3 mass fraction.

EFFECT: invention provides obtaining bitumen of road marks with hard paraffin content not exceeding 2,2 wt %, with increased indices of stretching properties and thermal oxidative stability.

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