The Experts below are selected from a list of 312 Experts worldwide ranked by ideXlab platform
Daniel C Stanley - One of the best experts on this subject based on the ideXlab platform.
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Characterization of intermediates in the microbial desulfurization of Dibenzothiophene.
Energy & Fuels, 1993Co-Authors: Edwin S Olson, Daniel C Stanley, John R GallagherAbstract:The desulfurization of Dibenzothiophene by Rhodococcus rhodochrous IGTS8 gave several microbial products which were isolated by extraction from the culture media. Two key compounds that were proposed as intermediates in the 4S pathway, for Dibenzothiophene desulfurization, are 2'-hydrorybiphenyl-2-sulfinic acid and 2'-hydrorybiphenyl-2-sulfonic acid. By utilizing a gas chromatographic/Fourier transform infrared/mass spectrometry (GC/FTIR/MS) system, these compounds were identified in the sultine form, dibenz[c,e] [1,2]orathiin 6-oxide, and sultone form, dibenz[c,e]-[1,2] oxathiin 6,6-dioxide, respectively
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microbial desulfurization of Dibenzothiophene a sulfur specific pathway
Fems Microbiology Letters, 1993Co-Authors: John R Gallagher, Edwin S Olson, Daniel C StanleyAbstract:Rhodococcus rhodochrous strain IGTS8 metabolizes Dibenzothiophene, a model compound for organic sulfur in fossil fuels, in a sulfur-specific manner. Two routes of desulfurization have been identified. Under growth conditions, the intermediates are Dibenzothiophene sulfoxide, Dibenzothiophene sulfone, 2′-hydroxybiphenyl-2-sulfonate, and 2,2′-dihydroxybiphenyl. Stationary phase cells produce 2-hydroxybiphenyl as the desulfurized product and use the 2′-hydroxybiphenyl-2-sulfonate, rather than the sulfonate, as key intermediate.
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Microbial desulfurization of Dibenzothiophene: A sulfur‐specific pathway
Fems Microbiology Letters, 1993Co-Authors: John R Gallagher, Edwin S Olson, Daniel C StanleyAbstract:Rhodococcus rhodochrous strain IGTS8 metabolizes Dibenzothiophene, a model compound for organic sulfur in fossil fuels, in a sulfur-specific manner. Two routes of desulfurization have been identified. Under growth conditions, the intermediates are Dibenzothiophene sulfoxide, Dibenzothiophene sulfone, 2′-hydroxybiphenyl-2-sulfonate, and 2,2′-dihydroxybiphenyl. Stationary phase cells produce 2-hydroxybiphenyl as the desulfurized product and use the 2′-hydroxybiphenyl-2-sulfonate, rather than the sulfonate, as key intermediate.
John R Gallagher - One of the best experts on this subject based on the ideXlab platform.
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Characterization of intermediates in the microbial desulfurization of Dibenzothiophene.
Energy & Fuels, 1993Co-Authors: Edwin S Olson, Daniel C Stanley, John R GallagherAbstract:The desulfurization of Dibenzothiophene by Rhodococcus rhodochrous IGTS8 gave several microbial products which were isolated by extraction from the culture media. Two key compounds that were proposed as intermediates in the 4S pathway, for Dibenzothiophene desulfurization, are 2'-hydrorybiphenyl-2-sulfinic acid and 2'-hydrorybiphenyl-2-sulfonic acid. By utilizing a gas chromatographic/Fourier transform infrared/mass spectrometry (GC/FTIR/MS) system, these compounds were identified in the sultine form, dibenz[c,e] [1,2]orathiin 6-oxide, and sultone form, dibenz[c,e]-[1,2] oxathiin 6,6-dioxide, respectively
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microbial desulfurization of Dibenzothiophene a sulfur specific pathway
Fems Microbiology Letters, 1993Co-Authors: John R Gallagher, Edwin S Olson, Daniel C StanleyAbstract:Rhodococcus rhodochrous strain IGTS8 metabolizes Dibenzothiophene, a model compound for organic sulfur in fossil fuels, in a sulfur-specific manner. Two routes of desulfurization have been identified. Under growth conditions, the intermediates are Dibenzothiophene sulfoxide, Dibenzothiophene sulfone, 2′-hydroxybiphenyl-2-sulfonate, and 2,2′-dihydroxybiphenyl. Stationary phase cells produce 2-hydroxybiphenyl as the desulfurized product and use the 2′-hydroxybiphenyl-2-sulfonate, rather than the sulfonate, as key intermediate.
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Microbial desulfurization of Dibenzothiophene: A sulfur‐specific pathway
Fems Microbiology Letters, 1993Co-Authors: John R Gallagher, Edwin S Olson, Daniel C StanleyAbstract:Rhodococcus rhodochrous strain IGTS8 metabolizes Dibenzothiophene, a model compound for organic sulfur in fossil fuels, in a sulfur-specific manner. Two routes of desulfurization have been identified. Under growth conditions, the intermediates are Dibenzothiophene sulfoxide, Dibenzothiophene sulfone, 2′-hydroxybiphenyl-2-sulfonate, and 2,2′-dihydroxybiphenyl. Stationary phase cells produce 2-hydroxybiphenyl as the desulfurized product and use the 2′-hydroxybiphenyl-2-sulfonate, rather than the sulfonate, as key intermediate.
Luisa Pisano - One of the best experts on this subject based on the ideXlab platform.
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active alkali metal promoted reductive desulfurization of Dibenzothiophene and its hindered analogues
Tetrahedron, 2013Co-Authors: Mario Pittalis, Ugo Azzena, Luisa PisanoAbstract:Dibenzothiophene and some related organosulfur compounds are efficiently reductively desulfurized under mild reaction conditions, with Na and/or Li metal in the presence of a catalytic amount of tetraphenylethylene in THF at room temperature. This simple methodology was applied to the synthesis of several substituted biphenyls, thus realizing a connection between the directing properties of the sulfur atom of Dibenzothiophene and the efficiency of 1,2-dianions of tetraphenylethane as homogenous electron transfer reagents.
Wong Pui Kwan - One of the best experts on this subject based on the ideXlab platform.
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a novel oxidative desulfurization process to remove refractory sulfur compounds from diesel fuel
Applied Catalysis B-environmental, 2006Co-Authors: Jeyagowry T Sampanthar, Huang Xiao, Xu Rong, Wong Pui KwanAbstract:Abstract Manganese and cobalt oxide catalysts supported on γ-Al 2 O 3 have been found to be effective in catalyzing air oxidation of the sulfur impurities in diesel to corresponding sulfones at a temperature range of 130–200 °C and atmospheric pressure. The sulfones were removed by extraction with polar solvent to reduce the sulfur level in diesel to as low as 40–60 ppm. Oxidation of model compounds showed that the most refractory sulfur compounds in hydrodesulfurization of diesel were more reactive in oxidation. The oxidative reactivity of model impurities in diesel follows the order: trialkyl-substituted Dibenzothiophene > dialkyl-substituted Dibenzothiophene > monoalkyl-substituted Dibenzothiophene > Dibenzothiophene.
Qiufeng Huang - One of the best experts on this subject based on the ideXlab platform.
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rhodium catalyzed sequential dehydrogenation deoxygenation in one pot efficient synthesis of Dibenzothiophene derivatives from diaryl sulfoxides
European Journal of Organic Chemistry, 2015Co-Authors: Qiufeng Huang, Shurong Fu, Shaojia Ke, Hanbing Xiao, Xiaofeng ZhangAbstract:A novel strategy for the synthesis of Dibenzothiophene derivatives is established through a one-pot intramolecular cross-dehydrogenative-coupling reaction of diaryl sulfoxides followed by deoxygenation with a Rh/Ag catalytic system. The yields obtained were good to excellent (up to 96 %), therefore making the described protocol an attractive option for building Dibenzothiophene compounds.