Coke drum additive injection

Patent metadata

Field	Value
Publication number	US-9969937-B2
Application number	US-201314030219-A
Country	US
Kind code	B2
Filing date	Sep 18, 2013
Priority date	Sep 21, 2012
Publication date	May 15, 2018
Grant date	May 15, 2018

Abstract

A process for producing coke that may include: heating a coker feedstock to a coking temperature to produce a heated coker feedstock; feeding the heated coker feedstock to a coking drum; feeding a coking additive, such as at least one hydroconversion or hydrocracking catalyst, to the coking drum; and subjecting the heated coker feedstock to thermal cracking in the coking drum to crack a portion of the coker feedstock to produce a cracked vapor product and produce a coke product.

First claim

What is claimed:

1. A process for producing coke, the process comprising:
heating a coker feedstock to a coking temperature to produce a heated coker feedstock;
mixing the heated coker feedstock and a coking additive comprising at least one hydroconversion or hydrocracking catalyst via a mixing tee to produce a mixture, wherein the mixing tee comprises at least two intersecting flow conduits and an injection nozzle extending into a perpendicular intersection of the at least two intersecting flow conduits,
wherein the mixing comprises passing the heated coker feedstock annularly over the injection nozzle and injecting the coking additive via the injection nozzle into the heated coker feedstock;

feeding the mixture to a bottom head of a coking drum;
subjecting the heated coker feedstock to thermal cracking in the coking drum to crack a portion of the coker feedstock to produce a cracked vapor product and produce a coke product.

2. The process of claim 1 , wherein the coke product has a VCM concentration in the range from about 5% to about 50% by weight, as measured by ASTM D3175t.

3. The process of claim 1 , wherein the coke product comprises at least one of sponge coke, needle coke, and shot coke.

4. The process of claim 1 , wherein mixing the heated coker feedstock comprises
feeding the heated coker feedstock to the mixing tee for a selected time period prior to feeding the coking additive to the mixing tee.

5. The process of claim 1 , further comprising admixing the coking additive with a carrier medium.

6. The process of claim 5 , wherein the carrier medium comprises a hydrocarbon or a mixture of hydrocarbons.

7. The process of claim 6 , wherein the carrier medium comprises a mixture including one or more hydrocarbons having a boiling point in the range from about 500° F. to about 950° F.

8. A process for producing coke, the process comprising:
heating a coker feedstock to a coking temperature to produce a heated coker feedstock;
mixing the heated coker feedstock and a coking additive comprising at least one hydroconversion or hydrocracking catalyst via a mixing tee to produce a mixture,
wherein the mixing tee comprises at least two intersecting flow conduits and an injection nozzle extending into a perpendicular intersection of the at least two intersecting flow conduits, and
wherein the mixing comprises passing the heated coker feedstock annularly over the injection nozzle and injecting the coking additive via the injection nozzle into the heated coker feedstock;

feeding the mixture to a bottom head of a coking drum; and
subjecting the heated coker feedstock to cracking in the coking drum to crack a portion of the coker feedstock to produce a cracked vapor product and produce a coke product.

9. The process of claim 8 , wherein the coking additive is a solid.

10. The process of claim 8 , wherein the coking additive is a slurry.

11. The process of claim 8 , wherein the mixing tee is immediately upstream of the coking drum proximate the bottom head of the coking drum.

Assignees

• Lummus Technology Inc

Inventors

• Faegh Ahmad

Classifications

• C10G11/00 Primary

  Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils (cracking in direct contact with molten metals or salts C10G9/34) · CPC title

• C10G9/005

  Coking (in order to produce liquid products mainly) · CPC title

• C10B57/06

  containing additives · CPC title

• C10B55/00

  Coking mineral oils, bitumen, tar, and the like or mixtures thereof with solid carbonaceous material (cracking oils C10G) · CPC title

• C10B31/00

  Charging devices · CPC title