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US 5,843,300 AGranted
Removal of organic sulfur compounds from FCC gasoline using regenerable adsorbents
AssigneeUop LLC
InventorsHerman A. Zinnen, Laszlo T. Nemeth, Jennifer R. Holmgren, Blaise J. Arena
Life of this patent
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Abstract
Removal of organic sulfur compounds, especially aromatic sulfur compounds from an FCC feedstock with minimal adsorption of aromatic hydrocarbons is achieved using a zeolite X exchanged with alkali or alkaline earth cations. KX is an especially effective adsorbent. Where the KX is loaded with a group VIII metal, particular palladium or platinum, the adsorbent is effectively regenerated by treatment with hydrogen at elevated temperatures.
Claims8
A process for removing organic sulfur compounds from a petroleum feedstock stream comprising:
- a. contacting said petroleum feedstock stream with an adsorbent of potassium-exchanged zeolite X impregnated with from about 0.05 to about 1.0 wt. % zerovalent platinum or platinum at a temperature from about 25.degree. to about 200.degree. C. for a time sufficient to adsorb said organic sulfur compounds on said adsorbent to afford a sulfur-depleted petroleum feedstock and a sulfur-laden adsorbent, and
- b. regenerating said adsorbent by heating the sulfur-laden adsorbent in flowing hydrogen at a temperature from about 25.degree. to about 300.degree. C. for a time sufficient to desulfurize said sulfur-laden adsorbent.
Dependencies are inferred from the claim text.