Slurry hydroconversion and coking of heavy oils
AssigneeExxonMobil Research and Engineering Company
InventorsRandolph J. Smiley, Anjaneya Sarma Kovvali, David G. Hammond, Grace Shi Qian Yeo
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Abstract
Systems and methods are provided for use of coking and slurry hydroconversion for conversion of heavy oil feeds. The combination of coking and slurry hydroconversion allows for improved yield of liquid products while reducing or minimizing the consumption of hydrogen in slurry hydroconversion reaction stages. Coking and slurry hydroconversion can be combined by segregating feeds based on Conradson carbon residue. Alternatively, slurry hydroconversion can be used to process unconverted bottoms from a coking process.
Claims10
A method for processing a heavy oil feedstock, comprising:
- providing a first heavy oil feedstock having a 10% distillation point of at least about 650° F. (343° C.) and a first Conradson carbon residue wt %;
- providing a second heavy oil feedstock having a 10% distillation point of at least about 650° F. (343° C.) and a second Conradson carbon residue wt %, the second Conradson carbon residue wt % being at least 5 wt % greater than the first Conradson carbon residue wt %;
- coking the first heavy oil feedstock under effective coking conditions to form at least a first plurality of liquid products and coke;
- exposing the second heavy oil feedstock to a catalyst under effective slurry hydroconversion conditions to form at least a second plurality of liquid products, the effective slurry hydroconversion conditions being effective for conversion of at least about 90 wt % of the second heavy oil feedstock relative to a conversion temperature;
- and
- wherein the first heavy oil feedstock and the second heavy oil feedstock are formed by performing a membrane separation of a third heavy oil feedstock.
Dependencies are inferred from the claim text.