Anode grade coke production
First Claim
1. A process for preparing anode grade coke from a petroleum residue feedstock containing sulfur and metal contaminants and essentially free of hydrotreated material, comprising:
- solvent deasphalting the residue feedstock to produce a deasphalted oil stream, a resin stream essentially free of asphaltenes and an asphaltene-rich stream;
feeding a process stream comprising the resin stream and essentially free of hydrotreated material directly to a delayed coker;
heating the process stream in the delayed coker under delayed coking conditions to form a batch of the anode grade coke.
2 Assignments
0 Petitions
Accused Products
Abstract
The invention is a process for making anode grade coke which comprises solvent deasphalting a residue feedstock to obtain an essentially asphaltene-free, resin-containing stream and coking the resin-containing stream in a delayed coker to make anode coke. The solvent deasphalting can make a deasphalted oil stream containing resin or separate deasphalted oil and resin streams. There can be hydrotreating of (1) a minor portion of the residue feedstock wherein the hydrotreated residue is fed to the delayed coker with the resin-containing stream, (2) the resin-containing stream wherein the hydrotreated resin stream is fed to the delayed coker, or (3) a major portion of the residue feedstock wherein the hydrotreated residue is fed to the solvent deasphalting unit.
68 Citations
31 Claims
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1. A process for preparing anode grade coke from a petroleum residue feedstock containing sulfur and metal contaminants and essentially free of hydrotreated material, comprising:
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solvent deasphalting the residue feedstock to produce a deasphalted oil stream, a resin stream essentially free of asphaltenes and an asphaltene-rich stream;
feeding a process stream comprising the resin stream and essentially free of hydrotreated material directly to a delayed coker;
heating the process stream in the delayed coker under delayed coking conditions to form a batch of the anode grade coke.
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2. A process for preparing anode grade coke from a petroleum residue feedstock containing sulfur and metal contaminants and essentially free of hydrotreated material, comprising:
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solvent deasphalting the residue feedstock to produce a deasphalted oil stream comprising resin and an asphaltene-rich stream;
feeding a process stream comprising the deasphalted oil stream and essentially free of hydrotreated material directly to a delayed coker;
heating the process stream in the delayed coke under delayed coking conditions to form a batch of the anode grade coke.
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3. A process for preparing anode grade coke from a petroleum residue feedstock containing sulfur and metal contaminants, comprising:
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hydrotreating a first process stream consisting essentially of a first minor portion of the residue feedstock to produce a hydrotreated residue stream of reduced sulfur and metal content;
solvent deasphalting a second major portion of the residue feedstock to produce a deasphalted oil stream, a resin stream essentially free of asphaltenes and an asphaltene-rich stream;
feeding the hydrotreated residue stream together with a second process stream comprising the resin stream and essentially free of hydrotreated material to a delayed coker;
heating the hydrotreated residue stream and the second process stream in the delayed coker under delayed coking conditions to form a batch of the anode grade coke. - View Dependent Claims (4, 5, 6, 7, 8)
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9. A process for preparing anode grade coke from a petroleum residue feedstock containing sulfur and metal contaminants and essentially free of hydrotreated material, comprising:
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solvent deasphalting a first process stream consisting essentially of the residue feedstock to produce a deasphalted oil stream, a resin stream essentially free of asphaltenes and an asphaltene-rich stream;
hydrotreating a second process stream consisting essentially of the resin stream to produce a hydrotreated resin-containing stream of reduced sulfur and metal content;
feeding a third process stream comprising the hydrotreated resin-containing stream to a delayed coker;
heating the third process stream in the delayed coker under delayed coking conditions to form a batch of the anode grade coke. - View Dependent Claims (10, 11, 12)
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13. A process for preparing anode grade coke from a petroleum residue feedstock containing sulfur and metal contaminants and essentially free of hydrotreated material, comprising:
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solvent deasphalting a first process stream consisting essentially of the residue feedstock to produce a deasphalted oil stream, a resin stream essentially free of asphaltenes and an asphaltene-rich stream;
hydrotreating a second process stream consisting essentially of the resin stream and a minor portion of the deasphalted oil stream to produce a hydrotreated resin-containing stream of reduced sulfur and metal content;
feeding a third process stream comprising the hydrotreated resin-containing stream to a delayed coker;
heating the third process stream in the delayed coker under delayed coking conditions to form a batch of the anode grade coke. - View Dependent Claims (14, 15, 16)
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17. A process for preparing anode grade coke from a petroleum residue feedstock containing sulfur and metal contaminants and essentially free of hydrotreated material, comprising:
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hydrotreating a first process stream consisting essentially of a major portion of the residue feedstock to produce a hydrotreated residue stream of reduced sulfur and metal content;
solvent deasphalting a second process stream comprising the hydrotreated residue stream and a minor portion of the residue feedstock essentially free of hydrotreating to produce a deasphalted oil stream, a resin stream essentially free of asphaltenes and an asphaltene-rich stream;
feeding a third process stream comprising the resin stream to a delayed coker;
heating the third process stream in the delayed coker under delayed coking conditions to form a batch of the anode grade coke. - View Dependent Claims (18, 19, 20, 21)
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22. A process for preparing anode grade coke from a petroleum residue feedstock containing sulfur and metal contaminants and essentially free of hydrotreated material, comprising:
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hydrotreating a first process stream consisting essentially of a major portion of the residue feedstock to produce a hydrotreated residue stream of reduced sulfur and metal content;
solvent deasphalting a second process stream comprising the hydrotreated residue stream and a minor portion of the residue feedstock to produce a deasphalted oil stream comprising resin and an asphaltene-rich stream;
feeding a third process stream comprising the deasphalted oil stream to a delayed coker;
heating the third process stream in the delayed coker under delayed coking conditions to form a batch of the anode grade coke. - View Dependent Claims (23, 24)
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25. A process for preparing anode grade coke from a petroleum residue feedstock containing sulfur and metal contaminants and essentially free of hydrotreated material, comprising:
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hydrotreating a first process stream consisting essentially of a minor portion of the residue feedstock to produce a hydrotreated residue stream of reduced sulfur and metal content;
solvent deasphalting a major portion of the residue feedstock to produce a deasphalted oil stream comprising resin and an asphaltene-rich stream;
feeding the hydrotreated residue stream together with a second process stream comprising the deasphalted oil stream to a delayed coker;
heating the hydrotreated residue stream and the second process stream in the delayed coker under delayed coking conditions to form a batch of the anode grade coke. - View Dependent Claims (26, 27, 28)
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29. A process for preparing anode grade coke from a petroleum residue feedstock containing sulfur and metal contaminants and essentially free of hydrotreated material, comprising:
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solvent deasphalting a first process stream consisting essentially of the residue feedstock to produce a deasphalted oil stream comprising resin and an asphaltene-rich stream;
hydrotreating a second process stream consisting essentially of the deasphalted oil stream to produce a hydrotreated residue stream of reduced sulfur and metal content;
feeding a third process stream comprising the hydrotreated residue stream to a delayed coker;
heating the third process stream in the delayed coker under delayed coking conditions to form a batch of the anode grade coke. - View Dependent Claims (30, 31)
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Specification