METHOD OF RECEIVING OF OXIDISED BITUMEN Russian patent published in 2009 - IPC C10C3/04 

FIELD: oil and gas production.

SUBSTANCE: invention relates to oil processing field, particularly to method of receiving of oxidised paving bitumen. Invention relates to method of receiving of oxidised bitumen by means of continuous oxidation of high-boiling waxy oil stock at increased temperature 200-260°C in column, in the capacity of stock it is used the composition of tar with penetration 200-350 dmm, and fluidising agent, by means of which it is lead stock penetration up to 360-490, in the capacity of fluidising agent it is selected one of listed below admixtures: the first or the third vacuum distillate, received at columns, or vat residue of linear alkyl benzene distillation, at that the first vacuum distillate or vat residue of linear alkyl benzene distillation are added to tar in amount 1-15 wt %, and the third vacuum distillate from 10 up to 80 wt %, and oxidation characteristic of raw material (coefficient A) and required correlation of air/stock, required for reduction of penetration for unit, is defined by formula: Q=A(P_25stock-P_{25bit back}), where: A=Q_cur/(P_25stock-P_25bit), cur - current correlation of air/stock (m³ of air/m³ stock); P_25stock - current penetration of stock at 25°C, dmm; P_25bit - current penetration of bitumen at 25°C, dmm; P_25bit.back. - defined penetration of bitumen at 25°C, dmm.

EFFECT: current method provides receiving of paving bitumen with the best indices of plasticity, defined specification of waxy petroleum refining residues of variable composition, for the purpose of improvement of bitumen flow characteristics.

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