PRODUCTION METHOD OF LOW-SULPHUR OIL COKE Russian patent published in 2017 - IPC C10B55/00 

FIELD: oil and gas industry.

SUBSTANCE: method involves the feedstock supply into the fractional column after heating in the heat exchangers to form the secondary feedstock, the heating of the secondary feedstock in the tube heater and feeding it into the coking reactor, coking to form the coke and overhead products, separating of the latter in the fractional column into the gas, gasoline, light, medium, heavy and superheavy coker gas oils with the target products output - gasoline, light and heavy gas oils. The part of heavy coker gas oil is returned into the fractional column as the washing liquid, the part is supplied into the overhead gas line to prevent coking. Before heating the secondary feedstock in the tube heater after the fractional column, it is mixed with light and medium coker gas oils, and the superheavy gas oil is introduced into the resulting mixture before injection into the coking reactor.

EFFECT: increase of the heater run life, improvement of the coke and heavy coker gas oil quality and increase of the coke yield.

4 cl, 1 dwg, 1 tbl