Hydrodesulfurization of oxidized sulfur compounds in benzothiophene, methylbenzothiophene, and dibenzothiophene series over CoO/MoO/sub 3//Al/sub 2/O/sub 3/ catalyst

Journal Article · Tue Jan 01 04:00:00 EST 1980 · J. Catal.; (United States)

OSTI ID:6229577

Geneste, P; Amblard, P; Bonnet, M; Graffin, P

Hydrodesulfurization experiments were conducted with sulfided Procatalyst HR 103 (2.8% CO, 13.5% MoO/sub 3/, 2.8% SiO/sub 2/, and 80.9% Al/sub 2/O/sub 3/) at 30-70 atm hydrogen pressure and 200/sup 0/-300/sup 0/C with pure sulfur compounds in dodecane solution. The dibenzothiophene series reacted in consecutive steps: 1-oxodibenzothiophene or 1,1-dioxodibenzothiophene to dibenzothiophene to biphenyl to phenylcyclohexane; the processes were first order in sulfone and sulfoxide, zero order in dibenzothiophene, and close to zero order in hydrogen. In the benzothiophene series, 1,1-dioxobenzothiophene and sulfoxides of methyl substituted benzothiophenes deoxygenated to benzothiophene or its substituted derivatives in a first step that was first order in reactant; benzothiophene or its substituted derivatives reacted in consecutive steps to 2,3-dihydrobenzothiophene (or derivatives) and ethylbenzene (or derivatives) with zero-order kinetics. In dibenzothiophenes, the C-S bond scission apparently occurred without prior hydrogenation of the aromatic ring, whereas in benzothiophene and its methyl derivatives, the thiophenic double bond was hydrogenated prior to desulfurization. Relationships of the reaction rate constants of sulfones and sulfide and the vertical ionization potentials suggested that electronic effects were preponderant.

• Research Organization: Ec. Natl. Super. Chim. Montpellier
• OSTI ID: 6229577
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 61:1; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL BONDS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COBALT COMPOUNDS
COBALT OXIDES
DATA
DESULFURIZATION
EXPERIMENTAL DATA
HETEROCYCLIC COMPOUNDS
INFORMATION
IONIZATION POTENTIAL
KINETICS
MOLYBDENUM COMPOUNDS
MOLYBDENUM OXIDES
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
REACTION INTERMEDIATES
REACTION KINETICS
REFRACTORY METAL COMPOUNDS
THIONAPHTHENES
TRANSITION ELEMENT COMPOUNDS