Combination coking and hydroconversion process

• US 4,569,751 A
• Filed: 11/30/1984
• Issued: 02/11/1986
• Est. Priority Date: 12/14/1983
• Status: Expired due to Term

• Current Assignee: Exxon Research and Engineering Company (Exxon Mobil Corporation)
• Original Assignee: Exxon Research and Engineering Company (Exxon Mobil Corporation)
• Inventors: Bearden, Roby Jr., Aldridge, Clyde L., Eidt, Clarence M. Jr.
• Primary Examiner(s): Gantz, D. E.
• Assistant Examiner(s): Pak, Chung K.
• Application Number:
  US06/676,863
• Time in Patent Office: 438 Days
• Field of Search: 208/54, 208/53, 208/50, 208/55, 208/131, 208/111, 208/68
• US Class Current: 208/53
• CPC Class Codes: C10G 69/06 including at least one step of thermal cracking in the absence of hydrogen

Abstract

A carbonaceous feed, such as a heavy hydrocarbonaceous oil or coal and mixtures thereof, is upgraded by a combination coking and catalytic slurry hydroconversion process.

Claims

1. An integrated coking and hydroconversion process which comprises the steps of:

(a) treating a carbonaceous feed having a Conradson carbon content of at least 5 weight percent in a coking zone at coking conditions, including a pressure ranging from zero to about 100 psig, to produce coke and a vapor phase product, including hydrocarbons boiling above 1050°

F.;

(b) separating a heavy bottoms fraction having an initial boiling point ranging from about 650°

F. to about 1050°

F. and having a Conradson carbon content of at least about 5 weight percent, including said hydrocarbons boiling above 1050°

F., from said vapor phase product;

(c) adding a hydroconversion catalyst or hydroconversion catalyst precursor to at least a portion of said heavy bottoms fraction to form a mixture, and

(d) subjecting at least a portion of said mixture of step (c) to hydroconversion conditions, in the presence of hydrogen, in a slurry hydroconversion zone to produce a hydroconverted oil.

2. The process of claim 1 wherein said coking conditions include a temperature ranging from about 775°

F. to about 1400°

F.

3. The process of claim 1 wherein said hydroconversion conditions include a pressure ranging from about 100 to about 5000 psig and a temperature ranging from about 650°

to about 1000°

F.

4. The process of claim 1 wherein said hydroconversion conditions include a pressure ranging from about 100 to about 499 psig and a temperature ranging from about 750°

to 820°

F.

5. The process of claim 1 wherein said carbonaceous feed of said coking zone has a Conradson carbon content of at least about 7 weight percent.

6. The process of claim 1 wherein said heavy bottoms fraction has a Conradson carbon content of at least about 7 weight percent.

7. The process of claim 1 wherein said hydroconversion catalyst precursor is an oil soluble metal compound or a thermally decomposable metal compound.

8. The process of claim 1 wherein said hydroconversion catalyst comprises metals-containing fines derived from the gasification of coke.

9. The process of claim 1 wherein said heavy bottoms fraction of step (b), comprises at least about 10 weight percent materials boiling above 1050°

F.

10. The process of claim 1 wherein at least 10 weight percent of the 1050°

F.⁺ materials of said portion of heavy bottoms fraction are converted to lower boiling products.

11. The process of claim 1 wherein said coking zone is a delayed coking zone operated at delayed coking conditions, including a temperature ranging from about 775°

to 1000°

F.

12. The process of claim 1 wherein said coking zone is a fluid coking zone operated at fluid coking conditions, including a temperature ranging from 850°

to about 1400°

F.