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US 9,790,442 B2Granted
Selective hydrogenation method
AssigneeUop LLC
InventorsPelin Cox, Deng-Yang Jan
Life of this patent
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Abstract
The present subject matter relates generally to methods for selectively saturating the unsaturated C2-C4. More specifically, the present subject matter relates to methods for saturating butadiene and butenes from a hydrocarbon stream before it is combined with a fresh feed and enters a reaction zone. Removing the unsaturates from the hydrocarbon stream before the hydrocarbon stream enters the reaction zone prevents the reactor internals from coking.
Claims16
A method for saturating hydrocarbons comprising:
- providing a hydrocarbon stream comprising paraffins having 4 or less carbon atoms, C2-C4 olefins, diolefins, aromatics, H2O, H2S, and other sulfur containing compounds, wherein the hydrocarbon stream comprises a portion of an effluent from a dehydrocyclodimerization reaction zone;
- passing the hydrocarbon stream to a guard bed and contacting the hydrocarbon stream with an adsorbent to remove H2O, H2S, and other sulfur containing compounds and form a treated hydrocarbon stream;
- and
- passing the treated hydrocarbon stream and a hydrogen stream to a reaction zone containing a hydrogenation catalyst to selectively hydrogenate the olefins and diolefins in the treated hydrocarbon stream and form a reaction zone effluent stream, wherein greater than about 60% by weight of the olefins are saturated, greater than about 80% by weight of the diolefins are saturated, and no more than 20% by weight of the aromatics are saturated.
1 more element
Dependencies are inferred from the claim text.