Integrated hydrocracking process

Patent metadata

Field	Value
Publication number	US-9856424-B2
Application number	US-201415121069-A
Country	US
Kind code	B2
Filing date	Dec 23, 2014
Priority date	Feb 25, 2014
Publication date	Jan 2, 2018
Grant date	Jan 2, 2018

Abstract

The present invention relates to an integrated hydrocracking process for production of olefinic and aromatic petro-chemicals from crude oil. An object of the present invention is to provide an integrated hydrocracking process for production of olefinic and aromatic petrochemicals from a hydrocarbon feedstock comprising crude oil wherein the portion of the crude oil converted to LPG is increased significantly.

First claim

The invention claimed is:

1. An integrated hydrocracking process for production of olefinic and aromatic petrochemicals from a hydrocarbon feedstock comprising crude oil, the process comprising:
treating the hydrocarbon feedstock comprising crude oil and a residual liquid stream in a first hydrocracking zone in the presence of hydrogen under conditions effective to produce a first effluent having an increased hydrogen content;
separating the first effluent into a liquefied petroleum gas (LPG) comprising stream and a liquid phase stream;
separating said LPG comprising stream into one or more streams chosen from a stream comprising hydrogen, a stream comprising methane, a stream comprising ethane, a stream comprising butanes, a stream comprising propane, and a stream comprising C4-minus;
further processing one or more of the streams obtained in a steam cracker unit and at least one unit chosen from-the group of a butanes dehydrogenation unit, a propane dehydrogenation unit, a combined propane-butanes dehydrogenation unit, or a combination of units thereof to produce mixed product stream(s);
feeding the mixed product stream(s) from said steam cracker unit and said at least one unit, chosen from the group of said butanes dehydrogenation unit, a said propane dehydrogenation unit, said combined propane-butanes dehydrogenation unit, or said combination of units thereof to a second separation section; and
separating the mixed product stream(s).

2. An integrated hydrocracking process for production of olefinic and aromatic petrochemicals from a hydrocarbon feedstock comprising crude oil, the process comprising:
treating the hydrocarbon feedstock comprising crude oil and a residual liquid stream in a first hydrocracking zone in the presence of hydrogen under conditions effective to produce a first effluent having an increased hydrogen content;
separating the first effluent into a liquefied petroleum gas (LPG) comprising stream and a liquid phase stream;
separating said LPG comprising stream into one or more streams chosen from a stream comprising hydrogen, a stream comprising ethane and a stream comprising C2-minus;
further processing one or more of the streams obtained in a steam cracker unit and at least one unit chosen from-the group of a butanes dehydrogenation unit, a propane dehydrogenation unit, a combined propane-butanes dehydrogenation unit, or a combination of units thereof to produce at least one mixed product stream;
feeding the at least one mixed product stream from said steam cracker unit and said at least one unit, chosen from the group of said butanes dehydrogenation unit, a said propane dehydrogenation unit, said combined propane-butanes dehydrogenation unit, or said combination of units thereof to a second separation section;
separating the at least one mixed product stream;
and feeding at least one stream chosen from said stream comprising ethane and said stream comprising C2-minus to said steam cracker unit.

3. The process according to claim 1 , further comprising feeding at least one stream chosen from said stream comprising propane and said stream comprising C4-minus to at least one dehydrogenation unit chosen from said butanes dehydrogenation unit, said propane dehydrogenation unit, said combined propane-butanes dehydrogenation unit, or a combination of units thereof.

4. The process according to claim 1 , further comprising recovering olefins and aromatics from the separated mixed product stream(s).

5. The process of claim 1 , further comprising:
treating said liquid phase stream in a second hydrocracking zone in the presence of hydrogen under conditions effective to produce a second effluent having an increased hydrogen content;
recovering from the second effluent from said second hydrocracking zone a mixture of benzene, toluene xylenes and ethyl benzene (BTXE) comprising stream, a LPG comprising stream and said residual liquid stream.

6. The process according to claim 5 , further comprising combining the LPG comprising stream originating from said first hydrocracking zone with the LPG comprising stream originating from said second hydrocracking zone.

7. The process according to claim 5 , further comprising recycling said residual liquid stream from said second hydrocracking zone and/or said liquid phase stream to inlet of the first hydrocracking zone.

8. The process according to claim 1 , further comprising recovering methane from the separated mixed product stream(s) and recycling said methane to the steam cracker to be used as fuel for burners and/or heaters.

9. The process according to claim 5 , further comprising recovering and purifying hydrogen from the separated mixed product stream(s) and recycling it to the inlet of the first and/or second hydrocracking zone.

10. The process according to claim 5 , further comprising recovering pyrolysis fuel oil from the separated mixed product stream(s) and recycling said pyrolysis fuel oil to the inlet of said first and/or second hydrocracking zone.

11. An integrated hydrocracking process for production of olefinic and aromatic petrochemicals from a hydrocarbon feedstock comprising crude oil, the process comprising:
treating the hydrocarbon feedstock comprising crude oil and a residual liquid stream in a first hydrocracking zone in the presence of hydrogen under conditions effective to produce a first effluent having an increased hydrogen content;
separating the first effluent into a liquefied petroleum gas (LPG) comprising stream and a liquid phase stream;
separating said LPG comprising stream into one or more streams chosen from a stream comprising hydrogen, a stream comprising methane, a stream comprising ethane, a stream comprising butanes, a stream comprising propane, a stream comprising C2-C3,
further processing one or more of the streams obtained in a steam cracker unit and at least one unit chosen from-the group of a butanes dehydrogenation unit, a propane dehydrogenation unit, a combined propane-butanes dehydrogenation unit, or a combination of units thereof to produce at least one mixed product stream;
feeding the at least one mixed product stream from said steam cracker unit and said at least one unit, chosen from the group of said butanes dehydrogenation unit, a said propane dehydrogenation unit, said combined propane-butanes dehydrogenation unit, or said combination of units thereof to a second separation section; and
separating the at least one mixed product stream.

12. The process according to claim 2 , further comprising recovering olefins and aromatics from the separated mixed product stream(s).

13. The process according to claim 11 , further comprising recovering olefins and aromatics from the separated at least one mixed product stream.

14. The process according to claim 5 , further comprising recovering hydrogen from the separated mixed product stream(s) and recycling it to the inlet of the first and/or second hydrocracking zone.

15. The process according to claim 5 , further comprising recovering pyrolysis fuel oil from the separated mixed product stream(s).

16. The process according to claim 5 , further comprising recycling said residual liquid stream from said second hydrocracking zone.

17. The process according to claim 5 , further comprising recycling said liquid phase stream to inlet of the first hydrocracking zone.

18. The process according to claim 1 , further comprising recovering methane from the separated mixed product stream.

19. The process of claim 1 , further comprising:
treating said liquid phase stream in a second hydrocrack

Assignees

• Saudi Basic Ind Corp
• Sabic Global Technologies Bv

Inventors

• Oprins Arno Johannes Maria

Classifications

• C10G2400/20

  C2-C4 olefins · CPC title

• C10G47/26

  suspended in the oil, e.g. slurries · CPC title

• C10G69/10

  hydrocracking of higher boiling fractions into naphtha and reforming the naphtha obtained · CPC title

• C07C4/04 Primary

  Thermal processes {(C07C4/025 takes precedence)} · CPC title

• C10G69/02 Primary

  plural serial stages only · CPC title