METHOD OF DECELERATED CARBONISATION OF OIL RESIDUES Russian patent published in 2012 - IPC C10B55/00 C10G9/14 

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to oil processing, particularly, to coke production of decelerated carbonisation with possibility of trapping coke steaming and cooling products. Proposed method comprises stock coking with accumulation of coke in chamber 6, separation of coking distillate products in rectifier column 7 into gaseous products 10, light and heavy solar oils 23 and 24, and heavy residue 9, coke steaming 30 and water-cooling 31, feeding steaming and cooling products 14 into absorber 13 furnished with heat exchangers, separating said products in absorber 13 into vapor and liquid phases, absorption of high-boiling oil products from vapor phase by feeding reside 16 from the bottom of absorber 13 to mass exchanger, cooling and condensing vapor phase components in condenser-refrigerator 17 and separating cooling products in separator 18 into gas, oil products and water. Note here that heavy solar oil 24 is divided into several flows. One of the latter is used as recycle 4 to be mixed with stock in evaporator 2 prior to coking. Another flow is used for diluting steaming and cooling products 14 prior to feed into absorber 13. Third flow is used as absorbent to top mass exchanger of absorber 13. Residue 16 from bottom of absorber 13 is fed back as absorbent to mass exchanger arranged at absorber center, preferably, to third or fourth mass exchanger. Balanced amount of reside 16 from absorber 13 and separated oil products from separator 18 are fed back into bottom of rectifier 7. Flushing product 27, for example, heavy solar oil, may be fed into condenser-refrigerator.

EFFECT: higher yield and efficiency.

2 cl, 1 dwg, 2 ex