Preparation of components for refinery blending of transportation fuels

A process for desulfurizing hydrocarbon feedstock to produce refinery transportation fuel or blending components for refinery transportation fuel, wherein said feedstock contains sulfur-containing organic impurities and/or nitrogen-containing organic impurities which process comprises:

• (a) contacting the feedstock with an immiscible phase comprising acetic acid, water, and an oxidizing agent comprising hydrogen peroxide and a protic acid not containing sulfur or nitrogen in an oxidation zone at oxidation zone conditions to oxidize sulfur-containing and/or nitrogen-containing organic compounds;
• (b) separating at least a portion of the immiscible phase containing oxidized sulfur-containing and/or nitrogen-containing organic compounds to form a first hydrocarbon stream having a reduced content of oxidized sulfur-containing and/or nitrogen containing compounds;
• (c) contacting at least a portion of the first hydrocarbon stream with a solvent comprising acetic acid and water in a liquid-liquid extraction zone to produce an extract stream containing at least a portion of the oxidized sulfur-containing and/or nitrogen-containing organic compounds and a raffinate second hydrocarbon stream containing a reduced amount of oxidized sulfur-containing organic compounds and/or nitrogen-containing organic compounds;
• and
• (d) recovering the second hydrocarbon stream.