Desulfurization of Heptane Solutions Using Nitrogen Dioxide-Sulfuric Acid Mixtures

Meadow, J. R.; Graves, Richard H.

doi:10.1021/ie50525a051

Cited by 2 publications

(1 citation statement)

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“…The reaction of sulfide species with concentrated sulfuric acid was previously reported by Meadow et al, 17,18 who attributed the desulfurization effect to NO 2 additives in small quantities of H 2 SO 4 . However, their analysis method could not distinguish between sulfoxides and other oxidized sulfur species present in the hydrocarbon phase and unreacted sulfide, nor did they report the reduction of sulfuric acid.…”

Section: Discussionmentioning

confidence: 58%

Oxidation of Aliphatic and Aromatic Sulfides Using Sulfuric Acid

Nehlsen

Benziger

Kevrekidis

2005

Ind. Eng. Chem. Res.

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Sulfuric acid is proposed as an inexpensive oxidant for use in the oxidative desulfurization (ODS) of petroleum. The oxidative extraction of thiophene, tetrahydrothiophene, and dibutyl sulfide by concentrated sulfuric acid in a two-liquid-phase reactor is demonstrated. The reaction proceeds rapidly at room temperature at sulfide concentrations greater than ∼100 ppm S and yields sulfoxides, sulfonates, and other oxidized sulfur species as products. The oxidized sulfur species are effectively extracted into the acid phase. The reactions are first-order in sulfide at high acid concentrations and first-order in acid at lower acid concentrations. This technique might be able to reduce the load on hydrodesulfurization (HDS) or ODS reactors by pretreating high-sulfur feed streams.

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Section: Discussionmentioning

confidence: 58%