A process for the extractive oxidation of contaminants from raw
hydrocarbon streams rich in heteroatomic polar compounds is described, the said process involving the extractive oxidation of
sulfur and
nitrogen compounds from said streams, the said process comprising treating said streams with a
peroxide solution /
organic acid couple, the weight percent of the
peroxide solution and
organic acid based on raw
hydrocarbon being at least 3 for both the
peroxide and
organic acid solution, under an acidic pH, atmospheric or higher pressure and ambient or higher temperature. As a result of the reaction, the oxidized heteroatomic compounds, having strong affinity for the aqueous phase, are extracted into said aqueous phase, while the oxidized
hydrocarbon is neutralized, water washed and dried, the resulting end product being a hydrocarbon
stream from which have been removed 88.1 wt % or more of
total nitrogen compounds and basic
nitrogen up to 99.1 wt %, both calculated as
mass contents, total
Sulfur 23.3% removal, and removal of total olefins is limited to 6.5 weight %. The treated product is further directed to any refining process.