Oxidation of olefins employing mesoporous molecular sieves modified with copper

Cánepa, Analía Laura; Chanquía, Corina M.; Eimer, Griselda A.; Casuscelli, Sandra G.

doi:10.1016/j.apcata.2013.04.031

Cited by 21 publications

(12 citation statements)

References 38 publications

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“…Indeed, the binding energy of C 1s is presumably composed of two overlapping peaks at 284.5 and 285.8 eV. The first peak is assigned from the carbons in contaminated organic product of spent samples while the higher binding value is characteristically assigned to carbonate anions (C = O, C -O bond) in the interlayered spaces [29,36,47,49,50].…”

Section: Xps Analysismentioning

confidence: 99%

Catalytic oxidation of styrene over Cu-doped hydrotalcites

Thảo

Huyen

2015

Chemical Engineering Journal

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Section: Xps Analysismentioning

confidence: 99%

Catalytic oxidation of styrene over Cu-doped hydrotalcites

Thảo

Huyen

2015

Chemical Engineering Journal

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“…The radical mechanism happens especially in the presence of H2O2 or O2 as oxidant. Both of these reagents are known to generate free radicals [68][69][70].…”

Section: Catalytic Oxidation Of Cyclohexenementioning

confidence: 99%

Ruthenium-doped Titania-pillared Clay for The Selective Catalytic Oxidation of Cyclohexene: Influence of Ru Loading

Dali¹,

Rekkab-Hammoumraoui

Korso

et al. 2019

Bull. Chem. React. Eng. Catal.

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A series of ruthenium-based catalysts supported on acid-activated montmorillonite (PILC) and interspersed with titanium (Ru/Ti-PILCs) were prepared with various amounts of ruthenium. Their catalytic performances in the selective oxidation of cyclohexene, using tert-butylhydroperoxide (TBHP) as oxidant were checked. The clay structure modification by acid activation and impregnation of transition metals resulted in an enhanced Lewis and Bronsted acidities. The Ru/Ti-PILCs materials were characterized using X-ray diffraction (XRD), surface area and pore volume measurements, surface acidity followed by Fourier transform infrared (FTIR) spectroscopy, chemical analysis, and Scanning Electron Microscopy (SEM). It was found that all catalysts can selectively oxidize cyclohexene through allylic oxidation leading mainly to 2-cyclohexene-1-one (Enone) as the major product, and 2-cyclohexene-1-ol (Enol) as secondary product. With the 5 %Ru/Ti-PILC, it was possible to reach 59 % cyclohexene total conversion, and 87 % selectivity into 2-cyclohexene-1-one and 13 % selectivity into 2-cyclohexene-1-ol. external surface of the material is active, as large organic molecules cannot dodge in and out layers. Moreover, though non-polar molecules have reduced dimensions, they cannot penetrate into the material due to the hydrophilic character of the layers [3]. In order to obtain thermally stable materials with a greater interlayer distance, cations can be intercalated between the clay layers. These cations act as pillars that help in keeping the silicate layers separated, even in the absence of solvents.

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“…This is unacceptable when the olefin is very valuable. In the heterogeneous version, beyond some concrete examples, the literature is scarce and the main problem is frequently the selectivity [14][15][16]. The allylic oxidation of the olefin competes with the epoxidation of the double bond and the formation of overoxidation products is a recurrent problem.…”

Section: Introductionmentioning

confidence: 99%