Saudi Arabian Oil Company

Oxford University Innovation Limited

The Chancellor, Masters and Scholars of the University of Oxford

Gary Dean Martinie

Bashir Osama Dabbousi

Farhan M Al-Shahrani

Tiancun Xiao

Anwar Hasan Al-Khawajah

Malcolm L H Green

Fahran M Al-Shahrani

The process for the desulfurization of a sulfur-containing hydrocarbon mixture, such as a full-range, hydrotreated diesel oil, is accomplished with an aqueous oxidizing agent in the presence of a catalyst and a co-catalyst, and thereafter selectively removing the oxidized compounds by solvent extraction. Optionally, the foregoing steps are followed by solvent stripping and recovery, and a final polishing step.

Process for oxidative conversion of organosulfur compounds in liquid hydrocarbon mixtures

Sulfur-containing compounds, including specifically thiophenic compounds, in a liquid hydrocarbon feedstream are catalytically oxidized by combining the hydrocarbon feedstream with a catalytic reaction mixture that includes a peroxide that is soluble in water or in a polar organic acid, at least one carboxylic acid, and a catalyst that is a transition metal salt selected from the group consisting of (NH)WO, (NH)WO.HO, NaWO, LiWO, KWO, MgWO, (NH)MoO, (NH)MoO.4HO, MnOand NaVO; the mixture is vigorously agitated for a time that is sufficient to oxidize the sulfur-containing compounds to form sulfoxides and sulfones; the reaction mixture is allowed to stand and separate into a lower aqueous layer containing the catalyst and an upper hydrocarbon layer that is recovered and from which the oxidized sulfur compounds are removed, as by solvent extraction, distillation or selective adsorption. The process can be used to reduce the sulfur content of liquid transportation fuels to 10 ppm, or less.

Catalytic process for deep oxidative desulfurization of liquid transportation fuels

A process to substantially reduce the sulfur content of a liquid hydrocarbon stream by contacting the hydrocarbon stream with an aqueous stream containing a mixture of one or more extraction agents selected from hypochlorites, cyanurates and alkali metal and alkaline earth metal hydroxides, optionally in the presence of a catalyst, to remove sulfur compounds.

Reactive extraction of sulfur compounds from hydrocarbon streams

A continuous method for the treatment of a spent aqueous caustic stream used to scrub a hydrocarbon process stream to remove oxidizable sulfur-containing compounds includes:

Process for treating a sulfur-containing spent caustic refinery stream using a membrane electrolyzer powered by a fuel cell

Naphtha-based fuels which have less than 1 ppm of sulfur and in excess of 15%, by weight, of hydrogen and an aromatics content of less than 1%, by weight, have been found to be useful as a fuel source for vehicular fuel cells.

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Gary Dean Martinie