DELAYED COKING PROCESS WITH PRE-CRACKING REACTOR Russian patent published in 2018 - IPC C10B55/00 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to delayed coking of heavy petroleum residue producing petroleum coke and lighter hydrocarbon products. Process comprises heating a hydrocarbon feedstock in a furnace to obtain hot feed; introducing the hot feed in a pre-cracking reactor wherein it undergoes mild thermal cracking reactions to obtain an outlet product material stream; passing the outlet product material stream either directly to a main fractionator to obtain heavy bottom fraction, or an intermediate separator to split outlet product material stream into top fraction and bottom product and transferring the top fraction to a main fractionator; heating the heavy bottom fraction or the heavy bottom in a furnace to obtain hot hydrocarbon stream; transferring the hot hydrocarbon stream to preheated coke drums, where it undergoes severe thermal cracking reactions to obtain product vapors; and passing the product vapors to the main fractionator to obtain desired product fractions.

EFFECT: increased overall yield of the required products and decreased overall yield of low-value coke.

35 cl, 5 dwg, 5 tbl