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US 4,208,271 AGranted
Process for the selective hydrogenation of gasolines comprising both gum-generating compounds and undesirable sulfur compounds
AssigneeInstitut Francais du Petrole
InventorsJean Cosyns, Michel Derrien
Life of this patent
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Abstract
Unsaturated gasolines of both high mercaptan or hydrogen sulfide content and high gum-generator content are hydrogenated first over a palladium catalyst and then over a nickel catalyst. Resultant unsaturated gasolines are sweet and have low gum-generator content.
Claims12
A process for the selective hydrogenation of gasoline contaning (a) mono-olefins, (b) gum-generating compounds, and at least 200 parts per million by weight of total sulfur, including at least 10 parts per million by weight calculated as sulfur of mercaptans or at least 2 parts per million by weight calculated as sulfur of hydrogen sulfide;
- said process comprising contacting gasoline with hydrogen at a temperature of 30.degree. to 250.degree. C. first with a supported palladium metal catalyst and then with a supported nickel metal catalyst;
- said contacting being conducted under such conditions that the gum-generating compounds are substantially eliminated and a sweetened gasoline is obtained without excessive hydrogenation of the monoolefins.
Dependencies are inferred from the claim text.