HYDRAULIC PROCESSING OF THERMAL CRAKING PRODUCTS Russian patent published in 2018 - IPC C10G65/02 C10G47/36 C10G65/12 C10L1/14 B01D3/14 

FIELD: oil and gas industry.

SUBSTANCE: method of upgrading gas oils to distillate hydrocarbons involves dividing a first gas oil flow into first and second parts; mixing a second gas oil flow with the first part of the first gas oil flow to form mixed gas oil flow; contacting the mixed gas oil and hydrogen flow with a first hydroconversion catalyst in a first hydrocracking reaction system to convert at least a portion of hydrocarbons in mixed gas oil flow to distillate hydrocarbons; recovering effluent from the first hydrocracking reaction system containing unconverted hydrocarbons and distillate hydrocarbons; fractionation of the effluent from the first hydrocracking reaction system into one or more hydrocarbon fractions, including a fraction containing unconverted hydrocarbons; contacting hydrogen and the fraction comprising unconverted hydrocarbons with a second hydroconversion catalyst in a second hydrocracking reaction system to convert at least a portion of unconverted hydrocarbons to distillate hydrocarbons; feeding the effluent from the second hydrocracking reaction system to a fractionation stage for co-fractionation with the effluent from the first hydrocracking reaction system; feeding the flow consisting of the second part of the first gas oil flow into a third hydrocracking reaction system; contacting the flow consisting of hydrogen and the second part of the first gas oil flow with the third hydroconversion catalyst in the third hydrocracking reaction system to convert at least a portion of the hydrocarbons in the second portion to the distillate hydrocarbons; fractionating the effluent from the third hydrocracking reaction system to recover two or more hydrocarbon fractions, wherein the first gas oil flow is different from the second gas oil flow. The disclosed flow separation principle makes it possible to optimise the reaction rates in hydrocracking reactors. Thereby taking advantage of the difference in reactivity of gas oils - the products of thermal cracking against non-cracked gas oils.

EFFECT: reduction of equipment cost for production of base oils, diesel fuel, kerosene, gasoline fuels with increased degree of conversion and long life of the catalyst.

30 cl, 1 dwg, 3 tbl