IP Library Granted Patent US 10,669,485
Granted Patent B2
US 10,669,485 · App. 15/877,878 · Granted Jun 2, 2020

Integrated process for producing anode grade coke

Inventor: Omer Refa Koseoglu (Dhahran, SA)
Assignee: SAUDI ARABIAN OIL COMPANY
C10B57/045C10B55/00C10G9/005C10G21/003C10G25/00C10G45/02C10G47/20C10G49/007C10G67/049C10G67/0463C10G67/06C10G67/14C10J3/00C10G2300/1033C10G2300/1055C10G2300/202Y02P20/125
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Quick Facts
Patent No.
US 10,669,485
App. No.
15/877,878
Granted
Jun 2, 2020
Kind
B2
Abstract

The invention relates to processes for producing anode grade coke from whole crude oil. The invention is accomplished by first deasphalting a feedstock, followed by processing resulting DAO and asphalt fractions. The DAO fraction is hydrotreated or hydrocracked, resulting in removal of sulfur and hydrocarbons, which boil at temperatures over 370° C., and gasifying the asphalt portion in one embodiment. This embodiment includes subjecting hydrotreated and/or unconverted DAO fractions to delayed coking. In an alternate embodiment, rather than gasifying the asphalt portion, it is subjected to delayed coking in a separate reaction chamber. Any coke produced via delayed coking can be gasified.

Claims (27)

1. A method for producing anode grade coke, comprising:

solvent deasphalting a hydrocarbon feedstock to produce an asphalt fraction and a deasphalted oil (DAO) fraction, in a first reaction chamber;

processing said DAO fraction and asphalt fraction in separate, second, third, and fourth reaction chambers;

(iii) hydrocracking said DAO fraction in said second reaction chamber in the presence of a catalyst, which contains from 2-40 wt % active metal, a pore volume of from 0.33-1.50 cc/gm, a surface area of 250-450 m 2 /g, and an average pore diameter of at least 50 Angstroms to remove sulfur and nitrogen therefrom and to distill any hydrocarbons contained in said DAO fraction which have a boiling point over 370° C.;

(iv) subjecting any hydrotreated or unconverted DAO fraction to delayed coking in a third chamber, and

(v) gasifying said asphalt fraction via combining it with oxygen and steam, in said fourth reaction chamber, to produce hydrogen therefrom.

2. The method of claim 1 , further comprising gasifying any coke produced in step (iv).

3. The method of claim 1 , comprising introducing and hydrogen produced in said third reaction chamber into said second reaction chamber.

4. The method of claim 1 , wherein said hydrocarbon feedstock is crude oil and said solvent deasphalting comprises mixing said crude oil with a paraffinic solvent containing C 3 -C 7 carbon atoms, at a temperature and a pressure below critical temperature and critical pressure of said solvent.

5. The method of claim 4 , wherein said solvent comprises n-butane and isobutane.

6. The method of claim 4 , further comprising contacting said crude oil with a solid adsorbent.

7. The method of claim 4 , wherein said solvent comprises a mixture of butanes.

8. The method of claim 4 , wherein said crude oil and solvent are combined at a weight ratio of from 10:1 to 200:1 w/w.

9. The method of claim 1 , comprising hydrocracking said DAO in a series of multiple chambers.

10. The method of claim 1 , wherein said second reaction chamber is a hydrocracking chamber and is a fixed bed, ebullated bed, or slurry bed chamber.

11. The method of claim 1 , wherein said active metal is a Group VI, VII, or VIIIB metal.

12. The method of claim 1 , wherein said active metal comprises Co, Ni, W, or Mo.

13. The method of claim 1 , wherein said catalyst is presented on a support.

14. The method of claim 13 , wherein said support comprises alumina, silica, or a zeolite.

15. The method of claim 14 , wherein said support is a zeolite with FAU, MOR, BEA or MFI topology.

16. The method of claim 15 , wherein said zeolite has been modified by treatment with at least one of steam, ammonia, or acid, and contains at least one transition metal.

17. The method of claim 16 , wherein said at least one transition metal is Zn or Ti.

18. The method of claim 1 , comprising gasifying said asphalt fraction at a temperature of from 900° C. to 1700° C., a pressure of from 20 bars to 100 bars, and an O 2 containing gas.

19. The method of claim 18 , wherein said O 2 containing gas is pure O 2 , air, or steam.

20. The method of claim 18 , comprising adjusting the amount of said asphalt fraction and said oxygen containing gas to provide a stoichiometric balance therebetween which results in partial combustion of said asphalt.

21. The method of claim 18 , wherein said O 2 from said O 2 containing gas and carbon from said asphalt fraction are present at a ratio of from 0.2:1.0 to 10:0.2 by weight.

22. The method of claim 19 , wherein said O 2 containing gas is steam, said method further comprising introducing said asphalt fraction and steam to said fourth reaction chamber at a ratio of from 0.1 to 1.0 to 10:0.1, based upon weight of carbon in said feedstock, wherein said feedstock is crude oil.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 22, 2020
From: KOSEOGLU, OMER REFA
To: SAUDI ARABIAN OIL COMPANY
Reel/Frame 053848/0111 →
Continuity (3)
Division 15219730 · Jul 26, 2016
Provisional Application 62200830 · Aug 4, 2015
Related Publication 20180148651A1 · May 31, 2018
Cited By (1)
US 12,566,585