Oxidation of Cyclohexane with Molecular Oxygen Catalyzed by SiO2 Supported Palladium Catalysts

Mishra, Gopal S.; Sinha, Shishir

doi:10.1007/s10562-008-9535-0

Cited by 17 publications

(8 citation statements)

References 27 publications

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“…They produce free HOO • radicals and create V(IV)-species, which are confirmed by DFT calculations [33,34]. We have also obtained an enhancement effect with PCA in the oxidation (O 2 ) of alkanes, catalyzed by supported V and Pd catalysts [24,35,36].…”

Section: Co-catalyst Effectsupporting

confidence: 73%

Selective functionalization of n-hexane with molecular O2 catalyzed by immobilized Cu/Co, Cu/Fe and Co/V complexes on modified Al2O3

Mishra

Kumar

2010

Reac Kinet Mech Cat

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Heterobinuclear macrocyclic complexes, i.e. CuCoL 1, CuFeL 2 and CoVL 3, have been synthesized and anchored onto modified carbamate Al 2 O 3 in order to obtain new hybrid supported catalysts. The identities of the supported metal complexes were confirmed by FT-IR, SEM-EDS and AAS. TGA indicated that the catalysts were thermally stable up to 230°C. These catalysts have been tested for the functionalization of n-hexane with molecular O 2 . The best result was obtained with CuFeL 2 over Al 2 O 3 (ca. 19% overall conversion; 78% selectivity: hexan-2-one plus hexan-2-ol) and promoted conversion could be obtained with 2-pyrazinecarboxylic acid (as co-catalyst). The effects of various factors (temperature, O 2 pressure, reaction time and catalyst concentration) were also investigated in detail. The impact of both C-and O-centred radical traps was also assessed to establish a radical mechanism.

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Section: Co-catalyst Effectsupporting

confidence: 73%

Selective functionalization of n-hexane with molecular O2 catalyzed by immobilized Cu/Co, Cu/Fe and Co/V complexes on modified Al2O3

Mishra

Kumar

2010

Reac Kinet Mech Cat

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“…There might be a possible structural modification of the nano-catalyst (by TGA). It suggests that the change of colour upon use and/or the deposition of polymerized Cy-hx material on the catalyst surface, which can also act as pore-blocker of solid catalysts [23,25,32,33].…”

Section: Reaction Mechanism For Oxidationmentioning

confidence: 99%

“…15 % and 20 %, respectively [23,24]. Some mesoporous silica supported di(ethylthio)alkanes Pd catalysts have also provided 16 % conversion in the same alkane reaction [25]. A literature survey shows that not only precious metal based catalysts but also non-precious metals i.e.…”

mentioning

confidence: 99%

Nanoparticles silica anchored Cu(II) and V(IV) scorpionate complexes for selective catalysis of cyclohexane oxidation

Machado

Mukhopadhyay

Mishra

2015

Journal of Molecular Catalysis A: Chemical

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“…The products resulting from its partial oxidation, cyclohexanol/cyclohexanone, also called K/A-oil, are very important for the production of adipic acid, which is used in the manufacture of textile fibres, such as nylon-6 and nylon-6.6. Normally the industrial process includes several reaction steps and produces toxic chlorinated by-products [72]. Using iodosylbenzene as oxidant and Ni-clay catalysts, Mata et al [71] found a very interesting system that led to cyclohexanone as the only product, with yields ranging from 20 to 27%, and 100% selectivity, under mild conditions.…”

Section: Epoxidationmentioning

confidence: 99%

Pillared Clay Catalysts in Green Oxidation Reactions

Vicente

Trujillano

Ciuffi

et al. 2010

Pillared Clays and Related Catalysts

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In this chapter, the use of pillared clays as catalysts in green oxidation reactions is considered. Several catalytic oxidation reactions have been selected, and special attention is given to the reaction products and to the yields achieved.Keywords PILC · Pillared clays · Green oxidation reactions · Catalysts IntroductionPillared InterLayered Clays (PILCs, in short) are prepared by exchanging the charge-compensating cations present in the interlamellar space of the clays with hydroxy-metal polycations. On calcination, the inserted polycations yield rigid, thermally stable oxide species, which prop the clay layers apart and prevent their collapse. The intercalation and pillaring processes produce the development of a porous structure with the presence of particular surface sites. These solids have been used in catalytic, purification, and sorption-based separation applications.The methods and the mathematical models used in the characterization of the porous structure of PILCs have been presented in a recent review [1]. From this study and all the references cited therein, it is clear that a great interest exists in the microporous structure of PILCs as well as in the effect of their structure on the applications of these materials. In summary, several researchers have suggested a bimodal micropore distribution for the microporous structure developed by the intercalated and the pillared clays, but this suggestion is open to questioning and can contribute to the expansion of this field in the coming years.Interest in the application of PILCs as catalysts has undergone a huge increase over the last few years [1,2]. One of the most studied subjects related to PILCs

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Oxidation of Cyclohexane with Molecular Oxygen Catalyzed by SiO2 Supported Palladium Catalysts

Cited by 17 publications

References 27 publications

Selective functionalization of n-hexane with molecular O2 catalyzed by immobilized Cu/Co, Cu/Fe and Co/V complexes on modified Al2O3

Selective functionalization of n-hexane with molecular O2 catalyzed by immobilized Cu/Co, Cu/Fe and Co/V complexes on modified Al2O3

Nanoparticles silica anchored Cu(II) and V(IV) scorpionate complexes for selective catalysis of cyclohexane oxidation

Pillared Clay Catalysts in Green Oxidation Reactions

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