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US 2016/0102258 A1Published application
Process and apparatus for selectively hydrogenating naphtha
AssigneeUop LLC
InventorsAvnish Kumar, Steven F. Zink, Soumendra M. Banerjee
Life of this patent
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Abstract
The process and apparatus of the present invention selectively hydrogenates a heavier olefinic naphtha stream in an upstream catalyst bed and the hydrogenated effluent and a lighter olefinic naphtha stream in a downstream catalyst bed. The heavier di-alkenes are less re-active and are contacted with more hydrogenation catalyst than the lighter di-alkenes which are more re-active.
Claims20
A process for selective hydrogenation comprising:
- mixing hydrogen with a heavy naphtha stream containing di-alkenes and having a first end point;
- selectively hydrogenating said heavy naphtha stream over a hydrogenation catalyst to produce a heavy hydrogenated naphtha stream with a lower concentration of di-alkenes;
- adding a lighter naphtha stream containing di-alkenes and having a second end point that is lower than the first end point to the heavy hydrogenated naphtha stream;
- and
- selectively hydrogenating the heavy hydrogenated naphtha stream and the lighter naphtha stream over hydrogenation catalyst to produce a product naphtha stream depleted of di-alkenes.
2 more elements
A process for selectively hydrogenating naphtha comprising:
- separating a naphtha stream into a light naphtha stream, an intermediate naphtha stream, and a heavy naphtha stream;
- mixing hydrogen with said heavy naphtha stream containing di-alkenes and having a first end point;
- selectively hydrogenating said heavy naphtha stream over a first bed of hydrogenation catalyst to produce a heavy hydrogenated naphtha stream with a lower concentration of di-alkenes;
- adding said lighter naphtha stream containing di-alkenes and have a second end point that is lower than the first end point to said heavy hydrogenated naphtha stream;
- and
- selectively hydrogenating the heavy naphtha stream and the lighter hydrogenated naphtha stream over a second bed of hydrogenation catalyst to produce a product naphtha stream depleted of di-alkenes.
3 more elements
A process for selectively hydrogenating naphtha comprising:
- separating a naphtha stream into a lighter naphtha stream and a heavy naphtha stream;
- mixing hydrogen with said heavy naphtha stream containing di-alkenes and having a first end point;
- selectively hydrogenating said heavy naphtha stream over a first bed of hydrogenation catalyst to produce a heavy hydrogenated naphtha stream with a lower concentration of di-alkenes;
- adding a lighter naphtha stream containing di-alkenes and having a second end point that is lower than the first end point to the heavy hydrogenated naphtha stream;
- and
- selectively hydrogenating the lighter naphtha stream and the heavy hydrogenated naphtha stream over a second bed of hydrogenation catalyst to produce a product naphtha stream depleted of di-alkenes.
3 more elements
Dependencies are inferred from the claim text.