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US 3,957,625 AGranted
Method for reducing the sulfur level of gasoline product
AssigneeMobil Oil Corporation
InventorBernard A. Orkin
Life of this patent
Estimating the term…
Abstract
Gasoline product of cracking desulfurized with a selective desulfurizing catalyst by processing particularly a high boiling portion thereof to minimize hydrogenation of desired olefins in the gasoline product of cracking.
Claims4
A method for reducing the sulfur content of a gasoline product derived from a cracking step which comprises;
- a. fractionating said gasoline product at a cut point in the range of 180.degree.-300.degree.F to recover a high boiling portion thereof which includes undesired high levels of combined sulfur from a lower boiling olefin-rich gasoline fraction,
- b. contacting said high boiling portion of said gasoline product with a cobalt-molybdenum-alumina desulfurizing catalyst including a promoter selected from the group consisting of barium, magnesium, cadmium, and a rare earth under reaction conditions of temperature, pressure, and space velocity to effect desulfurizing thereof without substantially reducing the olefin content of the desulfurized product and
- c. blending the desulfurized product of step (b) with the remaining lower boiling olefin-rich portion of the gasoline product of step (a) to produce a desulfurized gasoline desired low sulfur content and high octane rating.
Dependencies are inferred from the claim text.