Integrated process for the conversion of crude to olefins
AssigneeUop LLC
InventorsStanley S. Carp, Alan K. Bedell, David M. Banks, Keith Allen Couch, Gregory Funk, Cora Wang Ploentham, Stanley Joseph Frey
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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.
Claims20
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.
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.
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.
Dependencies are inferred from the claim text.