Abstract

The delayed coking method includes directing a heated secondary feedstock, which contains heated primary feedstock and recirculate, from a reaction furnace to a coking chamber. Vapor-liquid coking products formed in the coking chamber are then directed to a fractionation column, which fractionates hydrocarbon gas, gasoline, light and heavy gas oils, and bottom residues. Heavy gas oil from the fractionation column is directed to a thermal cracking furnace, the products of which are cooled by cooled light gas oil and directed to an evaporator for separation. In the evaporator, gases and light boiling products are removed by evaporation and returned to the fractionation column, and the remaining distillate cracking residue is separated and used as a component of the recirculate, along with bottom residues from the fractionation column. The resulting process produces high quality and high yield needle and anode cokes.

IPC Classes  ?

• C10B 23/00 - Other methods of heating coke ovens
• C10B 57/04 - Other carbonising or coking processesFeatures of destructive distillation processes in general using charges of special composition
• C10B 55/00 - Coking mineral oils, bitumen, tar or the like, or mixtures thereof, with solid carbonaceous materials