Combination process for producing high quality metallurgical coke
AssigneeUop LLC
InventorFrank Stolfa
Life of this patent
Estimating the term…
Abstract
A process for producing high quality metallurgical coke from hydrocarbonaceous charge stock containing coke precursors which comprises: (a) admixing said hydrocarbonaceous charge with a hereinafter described hydrocarbonaceous recycle stream; (b) introducing the resulting admixture into a coking zone maintained at coking conditions to produce coke and a hydrocarbonaceous effluent having a reduced level of coke precursors; (c) introducing at least a portion of said hydrocarbonaceous effluent into a hydrodesulfurization zone maintained at hydrodesulfurization conditions; (d) recycling at least a portion of the resultant desulfurized hydrocarbon of step (c) to step (a) as said hydrocarbonaceous recycle stream.
Claims3
A process for producing high quality metallurgical coke from a sulfur-containing reduced crude oil which comprises:
- a. admixing said reduced crude oil with a hydrocarbon recycle stream formed as hereinafter set forth;
- b. introducing the resulting mixture into a coking zone maintained at coking conditions to produce coke and a hydrocarbon effluent having a reduced level of coke precursors;
- c. separating the coke from the hydrocarbon effluent and recovering the same;
- d. introducing the hydrocarbon effluent to a flash zone and therein vaporizing hydrocarbons boiling up to about 400.degree. F.;
- e. hydrodesulfurizing the remainder of said effluent boiling above about 400.degree. F.;
- f. fractionating the resultant desulfurized remainder of the hydrocarbon effluent to separate therefrom hydrocarbons boiling up to about 650.degree. F., leaving a desulfurized hydrocarbon bottoms fraction boiling above about 650.degree. F.;
- and
- g. supplying at least a portion of said desulfurized bottoms fraction boiling above about 650.degree. F., to step (a) as said hydrocarbon recycle stream for admixture with the reduced crude oil therein.
Dependencies are inferred from the claim text.