Process and apparatus for selectively hydrogenating diolefins
AssigneeUop LLC
InventorsSteven F. Zink, Krishna Mani, Krishan Pratap Jadaun, Soumendra Mohan Banerjee
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Abstract
The present invention discloses a process and apparatus for selectively hydrogenating diolefins in a cracked stream. The method combines a conversion unit and a recovery section. The recovery section includes the diolefin hydrogenation reactor that is used to selectively hydrogenate the diolefins in the cracked naphtha. The diolefin depleted naphtha may be debutanized to separate the stabilized naphtha and liquefied petroleum gas streams.
Claims20
A process for selectively hydrogenating diolefins in a cracked stream comprising:
- cracking a hydrocarbon feed stream at elevated temperature to provide a cracked stream;
- fractionating said cracked stream to provide a liquid cracked stream;
- stripping said liquid cracked stream to remove dry gas from the liquid cracked stream and provide a stripped liquid cracked stream;
- debutanizing said stripped liquid cracked stream to provide a naphtha stream and a liquefied petroleum gas stream;
- selectively hydrogenating diolefins in said stripped liquid cracked stream prior to the debutanizing step to provide a diolefin depleted, liquid cracked stream in the presence of a first hydrogen stream;
- and
- contacting said diolefin depleted, liquid cracked stream with an adsorbent to adsorb silicon from said diolefin depleted, liquid cracked stream.
A process for selectively hydrogenating diolefins in a cracked stream comprising:
- cracking a hydrocarbon feed stream at elevated temperature to provide a cracked stream;
- fractionating said cracked stream to provide a liquid cracked stream;
- stripping said liquid cracked stream to remove dry gas from the liquid cracked stream and provide a stripped liquid cracked stream;
- selectively hydrogenating diolefins in said stripped liquid cracked stream to provide a diolefin depleted, liquid cracked stream in the presence of a first hydrogen stream;
- debutanizing said diolefin depleted, liquid cracked stream to provide a naphtha stream and a liquefied petroleum gas stream;
- and
- contacting said diolefin depleted, liquid cracked stream with a demetallization catalyst in the presence of a second hydrogen stream to demetallize said diolefin depleted, liquid cracked stream.
A process for selectively hydrogenating diolefins in a cracked stream comprising:
- cracking a hydrocarbon feed stream at elevated temperature to provide a cracked stream;
- fractionating said cracked stream to provide a liquid cracked stream;
- stripping said liquid cracked stream to remove dry gas from the liquid cracked stream and provide a stripped liquid cracked stream;
- selectively hydrogenating diolefins in said liquid cracked stream to provide a diolefin depleted, liquid cracked stream in the presence of a first hydrogen stream;
- debutanizing said diolefin depleted, liquid cracked stream in a debutanizer column to provide a naphtha stream and a liquefied petroleum gas stream;
- recovering a recycle hydrogen gas stream from an overhead of said debutanizer column and taking said first hydrogen stream from said recycle hydrogen stream;
- and
- contacting said diolefin depleted, liquid cracked stream with an adsorbent to adsorb silicon from said diolefin depleted, liquid cracked stream.
Dependencies are inferred from the claim text.