Back to results
US 9,393,538 B2Granted
Process and apparatus for selectively hydrogenating naphtha
AssigneeUop LLC
InventorsAvnish Kumar, Steven F. Zink, Soumendra M. Banerjee
Life of this patent
Estimating the term…
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.
Claims11
An apparatus for selective hydrogenation comprising:
- a fractionation column for producing a lighter naphtha stream at a lighter outlet and a heavy naphtha stream at a second outlet at a location in the column below the lighter outlet, and an overhead outlet at a location in the column above the lighter outlet;
- a selective hydrogenation reaction zone having a first inlet in downstream communication with the second outlet and a second inlet downstream of the first inlet and in downstream communication with the lighter outlet;
- and
- a overhead selective hydrogenation reaction zone in downstream communication with the overhead outlet and wherein said fractionation column is in downstream communication with said overhead selective hydrogenation reaction zone.
1 more element
An apparatus for selective hydrogenation comprising:
- a fractionation column for producing an overhead naphtha stream at an overhead outlet, a lighter naphtha stream at a lighter outlet and a heavy naphtha stream at a second outlet at a location in the column below the lighter outlet, wherein the overhead outlet is at a location in the column above the lighter outlet;
- a selective hydrogenation reaction zone having a first inlet in downstream communication with the second outlet and a second inlet downstream of the first inlet and in downstream communication with the lighter outlet, wherein said first inlet and said second inlet to said selective hydrogenation reaction zone are in the same vessel;
- and
- an overhead selective hydrogenation reaction zone in downstream communication with the overhead outlet and wherein said fractionation column is in downstream communication with said overhead selective hydrogenation reaction zone.
1 more element
An apparatus for selective hydrogenation comprising:
- a mercaptan reactor being in downstream communication with a source of alkaline;
- a fractionation column in downstream communication with said mercaptan reactor for producing a lighter naphtha stream at a lighter outlet and a heavy naphtha stream at a second outlet at a location in the column below the lighter outlet and an overhead outlet at a location in the column above the lighter outlet;
- and
- a selective hydrogenation reaction zone having a first inlet in downstream communication with the second outlet and a second inlet downstream of the first inlet and in downstream communication with the lighter outlet;
- and
- an overhead selective hydrogenation reaction zone in downstream communication with the overhead outlet and said fractionation column is in downstream communication with said overhead selective hydrogenation reaction zone.
3 more elements
Dependencies are inferred from the claim text.