Integrated process for the conversion of crude to olefins

Patent metadata

Field	Value
Publication number	US-12553000-B2
Application number	US-202418637209-A
Country	US
Kind code	B2
Filing date	Apr 16, 2024
Priority date	Dec 31, 2021
Publication date	Feb 17, 2026
Grant date	Feb 17, 2026

Abstract

A process for producing light olefins comprising thermal cracking. Hydrocracked streams are thermally cracked in a steam cracker to produce light olefins. A pyrolysis gas stream is separated into a light stream and a heavy stream. A light stream is separated into an aromatic naphtha stream and a non-aromatic naphtha stream. The aromatics can be saturated and thermally cracked. The integrated process may be employed to obtain olefin products of high value from a crude stream.

First claim

The invention claimed is:

1 . A process for producing light olefins and aromatics comprising:
thermally cracking a cracking feed stream to provide a cracked stream; separating a pyrolysis gas stream from said cracked stream; separating said pyrolysis gas stream into a light stream and a heavy stream; separating said light stream into a non-aromatic naphtha stream and an aromatic naphtha stream; saturating said aromatic naphtha stream to produce a product saturate stream; separating said product saturate stream into a heavy saturate stream and a light saturate stream; and isomerizing said light saturate stream to increase its normal paraffin concentration.

2 . The process of claim 1 further comprising separating said non-aromatic naphtha stream into a normal paraffins stream and a non-normal paraffins stream.

3 . The process of claim 2 further comprising thermally cracking said normal paraffins stream.

4 . The process of claim 2 further comprising isomerizing said non-normal paraffin stream to normal paraffins.

5 . The process of claim 1 further comprising hydrotreating said pyrolysis gas stream.

6 . The process of claim 1 further comprising separating said aromatic naphtha stream into a toluene stream and a C8 aromatics stream.

7 . The process of claim 6 further comprising separating said C8 aromatics stream into a xylene stream and a heavy aromatics stream.

8 . The process of claim 7 further comprising transalkylating said toluene stream and said heavy aromatics stream to form a transalkylated stream; and
separating said transalkylated stream into said toluene stream and said C8 aromatics stream.

9 . The process of claim 1 further comprising hydrocracking a distillate stream from a crude distillation unit and/or a deasphalted oil stream to produce said cracking feed stream.

10 . The process of claim 9 wherein said distillate stream may be a gas oil distillate stream or a middle distillate stream.

11 . The process of claim 10 further comprising hydrotreating a naphtha stream from said hydrocracking step and separating normal paraffins from non-normal paraffins in said naphtha stream.

12 . A process for producing light olefins and aromatics comprising:
hydrocracking a distillate stream from a crude distillation unit to produce a hydrocracked stream; hydrotreating a naphtha stream from said hydrocracking step and separating normal paraffins from non-normal paraffins in said naphtha stream; thermally cracking said hydrocracked stream to provide a pyrolysis gas stream; and separating said pyrolysis gas stream into a non-aromatic naphtha stream and an aromatic naphtha stream.

13 . The process of claim 12 further comprising separating said pyrolysis gas stream into a light stream and a heavy stream; and separating said light stream into said non-aromatic naphtha stream and said aromatic naphtha stream.

14 . The process of claim 13 further comprising separating said non-aromatic naphtha stream into a normal paraffins stream and a non-normal paraffins stream and thermally cracking said normal paraffins stream and isomerizing said non-normal paraffins stream.

15 . The process of claim 12 further comprising separating said aromatic naphtha stream into a toluene stream and a C8 aromatics stream; and
separating said C8 aromatics stream into a xylene stream and a heavy aromatics stream.

16 . The process of claim 15 further comprising transalkylating said toluene stream and said heavy aromatics stream to form a transalkylated stream; and
separating said transalkylated stream into said toluene stream and said C8 aromatics stream.

17 . A process for producing light olefins and aromatics comprising:
thermally cracking a cracking feed stream to provide a cracked stream; separating a pyrolysis gas stream from said cracked stream; reforming a naphtha stream to produce a reformed aromatics stream; and separating said pyrolysis gas stream and said reformed aromatics stream into a non-aromatic naphtha stream and an aromatic naphtha stream; separating said aromatic naphtha stream into a toluene stream and a C8 aromatics stream; separating said C8 aromatics stream into a xylene stream and a heavy aromatics stream; transalkylating said toluene stream and said heavy aromatics stream to form a transalkylated stream; and separating said transalkylated stream into said toluene stream and said C8 aromatics stream.

18 . The process of claim 17 further comprising hydrocracking a distillate stream from a crude distillation unit to produce said naphtha stream.

19 . The process of claim 17 further comprising saturating said aromatic naphtha stream to produce a product saturate stream and separating said product saturate stream into a heavy saturate stream and a light saturate stream.

20 . The process of claim 19 further comprising thermally cracking said heavy saturate stream and isomerizing said light saturate stream to increase its normal paraffin concentration.

Assignees

• Uop Llc

Inventors

• Carp Stanley S
• Bedell Alan K
• Banks David M
• Couch Keith Allen
• Funk Gregory
• Ploentham Cora Wang
• Frey Stanley Joseph

Classifications

• C10G45/58

  to change the structural skeleton of some of the hydrocarbon content without cracking the other hydrocarbons present, e.g. lowering pour point; Selective hydrocracking of normal paraffins (C10G32/00 takes precedence; improving or increasing the octane number or aromatic content of naphtha C10G35/00) · CPC title

• C10G2400/20

  C2-C4 olefins · CPC title

• C10G2300/4081

  Recycling aspects · CPC title

• C10G2300/4025

  Yield · CPC title

• C10G2300/1033

  Oil well production fluids · CPC title