Patents
A process for production of low ulfur residual fuel oil (sulfur content less than 2 weight %) from complex heavy end residues of petroleum hydrocarbons such as vacuum residue (VR) containing Sulfur compound around 5 weight % through dilution of the stream with light paraffinic solvent and extracting the sulfur compounds from oil phase and finally desulfurized stream using a polar selective solvent such as aqueous NMP, Furfural and Di-methyl formamide (DMF).