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A process for upgrading a diesel fuel, includes the steps of providing a diesel fuel feedstock; hydrogenating the feedstock at a pressure of less than about 600 psig so as to provide a hydrogenated product wherein a portion of the feedstock is converted to alkyl-naphthene-aromatic compounds; and sel

A process for upgrading a diesel fuel, includes the steps of providing a diesel fuel feedstock; hydrogenating the feedstock at a pressure of less than about 600 psig so as to provide a hydrogenated product wherein a portion of the feedstock is converted to alkyl-naphthene-aromatic compounds; and selectively oxidizing the hydrogenated product in the presence of a catalyst so as to convert the alkyl-naphthene-aromatic compounds to alkyl ketones. A catalyst and oxygen-containing Diesel fuel are also provided.

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What is claimed: 1. A process for upgrading a diesel fuel, comprising the steps of: providing a diesel fuel feedstock comprising a refinery stream having an aromatic content of at least about 20% by wt., and a cetane number less than about 44; hydrogenating the feedstock at a pressure of less than

What is claimed: 1. A process for upgrading a diesel fuel, comprising the steps of: providing a diesel fuel feedstock comprising a refinery stream having an aromatic content of at least about 20% by wt., and a cetane number less than about 44; hydrogenating the feedstock at a pressure of less than about 600 psig so as to provide a hydrogenated product wherein a portion of the feedstock is converted to alkyl-naphthene-aromatic compounds; and selectively oxidizing the hydrogenated product in the presence of a catalyst containing between about 1% and about 5% by weight of an element selected from the group consisting of oxides of Co, Ni, Fe, Cr, Cu and mixtures thereof; between about 300 and about 10,000 wt ppm of an oxide promoter; and between about 1% and about 4% by wt. of a nitrogen compound deposited on a support so as to convert the alkyl-naphthene-aromatic compounds to alkyl ketones wherein the oxygen is substantially distributed over the distillation range of the final product, wherein the oxygen is substantially distributed over the distillation range of the final product. 2. The process of claim 1, further comprising the step of subjecting the hydrogenated product to a selective adsorption step so as to remove color forming precursors and water-soluble compounds. 3. The process of claim 1, wherein the hydrogenation step is carried out at a pressure of between about 15 and about 50 bars and a temperature of between about 300 and about 410��C. 4. The process of claim 3, wherein the hydrogenation step is further carried out at a space velocity of between about 0.3 and about 2h-1 and a hydrogen to hydrocarbon ratio of between about 80 and about 400 N1/1. 5. The process of claim 1, wherein the support is selected from the group consisting of carboxylic polymer, nitrogen-containing polymer, nitrogen compound grafted on a silica support, and combinations thereof. 6. The process of claim 1, wherein the catalyst has a surface molar ratio of nitrogen to metal oxide of between about 0.2 and 4. 7. The process of claim 1, wherein the selectively oxidizing step is carried out at a pressure of between about 5 and about 40 bars, a temperature of between about 60��C. and about 140��C., a space velocity of between about 0.1 and about 2.0 h-1 and an air flow of between about 1 and about 1,000 (NPT) 1/h. 8. The process of claim 1, wherein the selectively oxidizing step produces a substantially homogeneous distribution of oxygen bound to alkyl-naphthene compounds over a boiling range of the final product, and a ratio of non-ketone oxygen to ketone-bound oxygen of between about 0.01 and about 0.1. 9. The process of claim 2, wherein the selective adsorption step is carried out with an adsorbent selected from the group consisting of alumina, modified alumina, clay, montmorillonite, bentonite, spent FCC catalyst, basic resin, activated carbon and mixtures thereof. 10. The process of claim 2, wherein the selective adsorption step is carried out at a pressure of between about 1 and about 40 bars, a temperature of between about room temperature and about 80��C. and a space velocity of between about 0.1 and about 10 h-1.