Epoxidation of unsaturated fatty esters over large-pore Ti-containing molecular sieves as catalysts: important role of the hydrophobic–hydrophilic properties of the molecular sieve

Camblor, Miguel Á.; Corma, Avelino; Esteve, Patricia; Martı́nez, Agustı́n; Valencia, Susana

doi:10.1039/a700448f

Cited by 109 publications

(57 citation statements)

References 13 publications

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“…Such results are in the same order of magnitude with those obtained over Ti-BEA. 16 They are also the first ones obtained, to our best knowledge, in methyl oleate epoxidation with aqueous hydrogen peroxide over Ti-grafted silica materials. Interestingly, the presence of some Ti-O-Ti domains in Ti/Aerosil (as evidenced by DRS-UV-Vis absorption bands above 300 nm) did not affect negatively the epoxidation performance and such behaviour can be attributed to the favorable conditions due to the slow addition of oxidant.…”

Section: Resultsmentioning

confidence: 96%

Epoxidation of methyl oleate with hydrogen peroxide. The use of Ti-containing silica solids as efficient heterogeneous catalysts

et al. 2011

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Titanium-silica catalysts, obtained by grafting titanocene dichloride onto mesoporous silica (MCM-41 and MCM-48) and onto nanosized pyrogenic silica, were tested in the epoxidation of methyl oleate using aqueous hydrogen peroxide. All titanium-containing materials, combined with the slow addition of hydrogen peroxide, showed good catalytic activity and comparable behaviour in terms of conversion, selectivity and yield of methyl epoxystearate, notwithstanding the morphology and the texture of the silica support. By optimizing the reaction conditions (especially, the catalyst to substrate ratio), high yields up to 91% in epoxide were obtained for Ti/MCM-41 with a high stereoselectivity (80%) for the cis-epoxide. The formation of the cis/trans-epoxide and the nature of the catalytic reaction pathway are also discussed.

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Section: Resultsmentioning

confidence: 96%

Epoxidation of methyl oleate with hydrogen peroxide. The use of Ti-containing silica solids as efficient heterogeneous catalysts

et al. 2011

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“…Ti-MCM-41, Ti-HMS) materials. Corma and coworkers were the first who applied this type of catalysts in the epoxidation of methyl oleate with H 2 O 2 or TBHP [57][58][59][60].…”

Section: Epoxidationmentioning

confidence: 99%

Oxidation of unsaturated fatty acid derivatives and vegetable oils

Köckritz

Martin

2008

Euro J Lipid Sci & Tech

193

135

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“…Some remarkable examples are titanium, vanadium, iron, molybdenum, manganese, or chromium. In the case of titanium, the most significant work on the direct synthesis of Ti-MCM-41 has been published by Corma et al [93][94][95]. The pH value of the synthesis gel is again a decisive variable to obtain structured titanium-containing MCM-41 materials, with the optimum OH/SiO 2 molar ratio = 0.26.…”

Section: Metal-containing Silica Mesostructured Materialsmentioning

confidence: 99%