PROCESS FOR RECOVERING HYDROPROCESSED HYDROCARBONS WITH TWO STRIPPERS AND COMMON OVERHEAD RECOVERY

• US 20130043162A1
• Filed: 08/19/2011
• Published: 02/21/2013
• Est. Priority Date: 08/19/2011
• Status: Active Grant

• Current Assignee: UOP Llc (Honeywell International Inc.)
• Original Assignee: UOP Llc (Honeywell International Inc.)
• Inventors: Zhu, Xin X., Murty, Vedula K., Hoehn, Richard K., Bowman, David M.
• Granted Patent: US 8,999,150 B2
• Time in Patent Office: Days
• US Class Current: 208/100
• CPC Class Codes: C10G 49/22 Separation of effluents

Abstract

A process is disclosed for recovering hydroprocessing effluent from a hydroprocessing unit utilizing a hot stripper and a cold stripper. The cold stripper and the hot stripper utilize a common overhead recovery apparatus.

Claims

1. A hydroprocessing process comprising:

hydroprocessing a hydrocarbon feed in a hydroprocessing reactor to provide hydroprocessing effluent stream;

stripping a relatively cold hydroprocessing effluent stream with stripping media in a cold stripper to provide a cold stripped stream and a cold vapor stream;

stripping a relatively hot hydroprocessing effluent stream with stripping media in a hot stripper to provide a hot stripped stream and a hot vapor stream; and

condensing said cold vapor stream and said hot vapor stream in a condenser to provide a condensed overhead stream.

2. The hydroprocessing process of claim 1 further comprising separating said condensed overhead stream into an off-gas stream and a condensed receiver bottoms stream in an overhead receiver.

3. The hydroprocessing process of claim 2 further comprising refluxing at least a portion of said condensed receiver bottoms stream to said hot stripper.

4. The hydroprocessing process of claim 2 further comprising refluxing at least a portion of said condensed receiver bottoms stream to said cold stripper.

5. The hydroprocessing process of claim 1 further comprising mixing vapor from said cold stripper and vapor from said hot stripper in a common overhead section.

6. The hydroprocessing process of claim 1 further comprising isolating a cold stripped bottom stream of said cold stripper from a hot stripped bottom stream of said hot stripper.

7. The hydroprocessing process of claim 1 further comprising supplying a cold stripping media to said cold stripper and supplying a hot stripping media to said hot stripper.

8. The hydroprocessing process of claim 1 further comprising a fractionating said cold stripped stream and said hot stripped stream to provide product streams.

9. A hydroprocessing product recovery process for recovering product from a cold hydroprocessing effluent stream and a hot hydroprocessing effluent stream comprising:

stripping a relatively cold hydroprocessing effluent stream with stripping media in a cold stripper to provide a cold stripped stream and a cold vapor stream;

stripping a relatively hot hydroprocessing effluent stream with stripping media in a hot stripper to provide a hot stripped stream and a hot vapor stream;

condensing said cold vapor stream and said hot vapor stream in a condenser to provide a condensed overhead stream; and

fractionating the cold stripped stream and the hot stripped stream to provide product streams.

10. The hydroprocessing product recovery process of claim 9 further comprising separating said condensed overhead stream into an off-gas stream and a condensed receiver bottoms stream in an overhead receiver.

11. The hydroprocessing product recovery process of claim 10 further comprising refluxing at least a portion of said condensed receiver bottoms stream to said hot stripper.

12. The hydroprocessing product recovery process of claim 10 further comprising refluxing at least a portion of said condensed receiver bottoms stream to said cold stripper.

13. The hydroprocessing product recovery process of claim 9 further comprising mixing vapor from said cold stripper and vapor from said hot stripper in a common overhead section.

14. The hydroprocessing product recovery process of claim 9 further comprising isolating a cold stripped bottoms line of said cold stripper from a hot stripped bottoms line of said hot stripper.

15. The hydroprocessing product recovery process of claim 9 further comprising supplying a cold stripping media to said cold stripper and supplying a hot stripping media to said hot stripper.

16. A hydroprocessing process comprising:

hydroprocessing a hydrocarbon feed in a hydroprocessing reactor to provide hydroprocessing effluent stream;

stripping a relatively cold hydroprocessing effluent stream with stripping media in a cold stripper to provide a cold stripped stream and a cold vapor stream;

stripping a relatively hot hydroprocessing effluent stream with stripping media in a hot stripper to provide a hot stripped stream and a hot vapor stream; and

separating a portion of said cold vapor stream and said hot vapor stream into an off-gas stream and a receiver bottoms stream in an overhead receiver.

17. The hydroprocessing process of claim 16 further comprising condensing said cold vapor stream and said hot vapor stream in a condenser to provide a condensed overhead stream.

18. The hydroprocessing process of claim 17 further comprising feeding said condensed overhead stream to said overhead receiver.

19. The hydroprocessing process of claim 17 further comprising refluxing at least a portion of said condensed receiver bottoms stream to said cold stripper and to said hot stripper.

20. The hydroprocessing process of claim 16 further comprising mixing vapor from said cold stripper and vapor from said hot stripper in a common overhead section.