938-09-0Relevant articles and documents
Remarkable efficiency of iron(III) versus manganese(III) tetraphenylporphyrins as catalysts for fast and quantitative oxidation of sulfides into sulfones by hydrogen peroxide
Marques, Antonio,Di Matteo, Massimo,Ruasse, Marie-Francoise
, p. 770 - 775 (1998)
The efficiency of various metallo-phtalocyanines (Pht) and - tetraphenylporphyrins (TPP) as catalysts for the H2O2 oxidations of dibenzylsulfide, phenylchloroethylsulfide, and thioanisole is investigated in ethanol and acetonitrile, using imidazole as a cocatalyst. Neither PhtNi(II) nor TPPCo(II) exhibits any catalytic activity. PhtMn(II) and TPPMn(III)Cl accelerate markedly these reactions but do not promote quantitative oxidations, at most 70% of the sulfides being transformed into sulfoxides. In contrast, with PhtFe(II) sulfoxides are obtained with a 100% yield from sulfides. Finally, the only catalyst able to oxidize sulfides rapidly (5 min), completely and quantitatively (100% sulfone) is TPPFe(III)Cl in EtOH. The absence of any by-product, disulfide in particular, suggests that a free sulfenium radical cation is not an active intermediate in these reactions. The marked differences in the behaviour of TPPMn(III)Cl and TPPFe(III)Cl are analyzed by comparing the rates of the catalyst decomposition, of the sulfoxide and sulfone formation as a function of the hydrogen peroxide concentration. The results are discussed in terms of a competition between the several oxidative pathways and a possible mechanism for the oxygen transfer to sulfides.
By means of a micro channel reactor method of preparing sulfoxide or sulfone
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Paragraph 0090-0094, (2017/04/11)
The invention discloses a method for preparing sulfoxide or sulfone by using a micro-channel reactor. The invention provides a method for preparing sulfoxide or sulfone. The method comprises the following steps: respectively feeding a homogeneous solution prepared from thioether 1 and a solvent, and an oxidant into the micro-channel reactor, and contacting the homogeneous solution with the oxidant in a micro-channel for oxidation reaction so as to obtain sulfoxide or sulfone, wherein the oxidation reaction time is 1-300 seconds. The method disclosed by the invention is very short in reaction time, precise in reaction condition control, high in security, applicable to rapid preparation of kilogram-scale products and capable of realizing continuous production; the sulfoxide and sulfone are high in selectivity, high in yield, good in purity and applicable to on-scale industrial production.
L-Gel formulation and decontamination reaction of its active ingredient (oxone) against mustard and VX nerve agent simulants
Farahipour, Mahdi,Fakhraian, Hossein,Mirzaei, Akbar,Hosseini, Morteza Ali
experimental part, p. 2303 - 2310 (2012/03/27)
L-Gel is an effective decontamination reagent against chemical and biological warfare agents. To achieve optimized formulation of L-Gel, several formulations with different proportional amounts of oxone (oxidizer) and Cab-O-Sil (gelling agent) were prepared and their viscosities and densities were measured. Final optimized formulation of gel was obtained as a 0.25 M aqueous solution of oxone gelled with 13%W/W of Cab-O-Sil EH-5. The L-Gel active ingredient (oxone) was tested against O,O,S-triethyl phosphorothioate (TEPT) as VX simulant and methyl phenyl sulfide (MPS) and chloroethyl phenyl sulfide (CEPS) as HD simulants. Decontamination of TEPT by a 10-fold excess amount of oxone was completed within 7.5 min with a kinetic rate constant of 0.097 S -1. In the presence of oxone, MPS was converted to methyl phenyl sulfoxide and methyl phenyl sulfone with a higher reaction rate than CEPS, decontaminated product of which was chloroethyl phenyl sulfone. Copyright Taylor & Francis Group, LLC.
