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US 4,332,671 AGranted
Processing of heavy high-sulfur crude oil
AssigneeConoco Inc.
InventorLyndon D. Boyer
Life of this patent
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Abstract
Heavy high-sulfur crude oil is subjected to distillation to produce gas and liquid hydrocarbon products and a residuum. The gas and liquid products are desulfurized. Part of the residuum is coked in a delayed coker, and sulfur in the coke is removed by high temperature calcination. The remainder of the residuum is air-blown to produce an asphalt product, and sulfur recovered from the other products is added to the asphalt to produce a sulfur-enriched asphalt product.
Claims6
A process for treating a heavy, high-sulfur crude oil to produce gas and liquid hydrocarbons, delayed petroleum coke and sulfur-enriched residuum comprising:
- (a) subjecting said crude oil to distillation whereby gas and liquid hydrocarbon products and a residuum are produced;
- (b) subjecting a first portion of said residuum to delayed coking;
- (c) calcining the delayed coke to produce sulfur and calcined coke;
- (d) recovering sulfur from said calcining step and adding said sulfur to a second portion of said residuum to produce a sulfur-enriched residuum.
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Dependencies are inferred from the claim text.