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Selective oxidation of bulky organic sulphides over layered titanosilicate catalysts
- Source :
- Catalysis Science & Technology. 6:2775-2786
- Publication Year :
- 2016
- Publisher :
- Royal Society of Chemistry (RSC), 2016.
-
Abstract
- The authors acknowledge the Czech Science Foundation (P106/12/G015) for the financial support. Selective oxidation of sulphides is a straightforward method of preparation of organic sulphoxides and sulphones, which are important chemical intermediates and building blocks of pharmaceuticals and agrochemicals. Oxidation of methylphenyl sulphide (MPS), diphenyl sulphide (Ph2S), and dibenzothiophene (DBTH) over lamellar titanosilicate catalysts with the MFI and UTL-derived topology was investigated with hydrogen peroxide as the oxidant. Lamellar titanosilicates combine the advantages of crystalline zeolites and mesoporous molecular sieves due to accessible active sites located on the external surface of their layers. The selectivity of the MPS oxidation to methylphenyl sulphoxide is driven by the diffusion restrictions in the catalyst. A methylphenyl sulphoxide selectivity of 95% at 40% conversion was achieved using the Ti-IPC-1-PI catalyst together with an outstanding TONtot = 1418 after 30 min. The selectivity can be adjusted also by dosing of the oxidant to keep its concentration low during the reaction. The silica-titania pillared TS-1-PITi catalyst showed the highest potential of the tested catalysts in oxidative desulphuration, easily oxidising the DBTH to dibenzothiothene sulphone. Postprint
- Subjects :
- Diffusion
Inorganic chemistry
NDAS
02 engineering and technology
QD Chemistry
010402 general chemistry
021001 nanoscience & nanotechnology
Molecular sieve
01 natural sciences
Catalysis
0104 chemical sciences
chemistry.chemical_compound
chemistry
Dibenzothiophene
QD
Lamellar structure
0210 nano-technology
Selectivity
Mesoporous material
Hydrogen peroxide
Subjects
Details
- ISSN :
- 20444761 and 20444753
- Volume :
- 6
- Database :
- OpenAIRE
- Journal :
- Catalysis Science & Technology
- Accession number :
- edsair.doi.dedup.....a040d6aa357103afb68ee0e459d9f8ab