The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 04, 2014
Filed:
Mar. 05, 2007
Farhan M. Al-shahrani, Dhahran, SA;
Tiancun Xiao, Oxford, GB;
Gary Dean Martinie, Graham, NC (US);
Malcolm L. H. Green, Oxford, GB;
Farhan M. Al-Shahrani, Dhahran, SA;
Tiancun Xiao, Oxford, GB;
Gary Dean Martinie, Graham, NC (US);
Malcolm L. H. Green, Oxford, GB;
Saudi Arabian Oil Company, Dhahran, SA;
The Chancellor, Masters and Scholars of the University of Oxford, Oxford, GB;
Abstract
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.