4565-32-6Relevant articles and documents
Stereochemistry of Intramolecular Homolytic Substitution at the Sulphur Atom of a Chiral Sulphoxide
Beckwith, Athelstan L. J.,Boate, Douglas R.
, p. 189 - 190 (1986)
The formation of the cyclic sulphoxide (R)-(6) by treatment of the bromoarene (R)-(2) with tributylstannane indicates that intramolecular homolytic substitution at the sulphur centre of the sulphoxide group proceeds with strict inversion of configuration.
Competitive adsorptions between thiophenic compounds over a CoMoS/Al2O3 catalyst under deep HDS of FCC gasoline
dos Santos, Alan Silva,Girard, Etienne,Leflaive, Philibert,Brunet, Sylvette
, p. 292 - 298 (2018/12/11)
The transformation of various model sulfur compounds (2-methylthiophene: 2MT, 3-methylthiophene: 3MT and benzothiophene: BT) representative of sulfur compounds in FCC gasoline was investigated over a CoMoS/Al2O3 catalyst. More specifically, a quantitative reactivity scale was established with BT being more reactive than 3MT and 2MT. In mixture, their reactivity was reduced due to the presence of the other sulfur compound, the scale of reactivity being preserved. BT strongly inhibits the transformation of 2MT. With a single kinetic model based on a Langmuir Hinshelwood formalism, kinetic and adsorption parameters were calculated and the results explained by mutual competitive adsorption between 2MT and BT with a higher adsorption constant for BT compared to that of 2MT.
NiMo catalysts supported on the Nb modified mesoporous SBA-15 and HMS: Effect of thioglycolic acid addition on HDS
Palcheva, Radostina,Kalu?a, Luděk,Dimitrov, Lubomir,Tyuliev, Georgi,Avdeev, Georgi,Jirátová, Květa,Spojakina, Alla
, p. 24 - 34 (2016/04/26)
Nb modified mesoporous SBA-15 and HMS materials were synthesized and studied as a support of NiMo. Calcined co-impregnated NiMo catalysts were prepared using ammonium heptamolybdate and nickel nitrate. Moreover, NiMo catalysts prepared in this manner were treated with thioglycolic acid (TGA). For comparison, NiMo catalysts were prepared by a simultaneous impregnation of the supports with Ni, Mo precursors and TGA. The TGA:Mo molar ratio was 4.0. The supports and NiMo catalysts were characterized by N2 physisorption, small- and wide-angle XRD, TPD-NH3, SEM, UV-vis DRS, FTIR and XPS. Catalyst activity was examined in hydrodesulfurization (HDS) reactions of 1-benzothiophene and thiophene at 350°C. It was found that simultaneous impregnation by Ni, Mo and TGA led to higher HDS activities than the sequential treatment of the calcined NiMo catalysts by TGA.