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AssigneePetroleo Brasileiro S.A. - Petrobras
InventorsWladmir de Souza, Lilian Ernst
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A process is described for the extractive oxidation of contaminants present in raw fuel streams rich in heteroatomic polar compounds and catalyzed by iron oxides contained in natural limonitic goethite, said process comprising contacting said streams with an oxidation pair which is a peroxide in solution/organic acid in amount of at least 3 and an amount between 0.01 and 10 wt % of an iron oxide, both based on the feed, the iron oxide being made up of a reduced natural limonitic goethite. The goethite reduction by a hydrogen stream has the advantage of lowering the migration of non-contaminating polar hydrocarbons from the fuel stream to the aqueous phase, at the same time obtaining higher mass yield of final product fuel while the level of target contaminants to be removed is maintained relative to the state-of-the-art process. Process yields attain 98% weight/weight.
A process for the extractive oxidation of contaminants present in raw fuel streams catalyzed by iron oxides, where heteroatomic polar compounds, conjugated dienes and other unsaturated parts of said streams are oxidized and simultaneously extracted into the aqueous phase by an aqueous slurry of a peroxide in solution/organic acid pair and catalyst based on iron oxides contained in natural limonitic goethite, under an acidic pH, atmospheric pressure and ambient or higher temperature, while the stream of oxidized fuel is separated from the catalyst, wherein said process comprises contacting the raw fuel stream under oxidation conditions in the presence of said oxidizing aqueous slurry and between 0,01 and 10 wt % based on the feed, of reduced limonitic goethite, whereby is obtained a product at higher mass yields and at the same level of removal of sulfur and nitrogen compounds from the fuel stream obtained in state-of-the-art processes.
Dependencies are inferred from the claim text.