Polymer supported cobalt(II) catalysts for alkene epoxidation

Kowalski, Grzegorz; Pielichowski, Jan; Jasieniak, Marek

doi:10.1016/s0926-860x(03)00099-1

Cited by 37 publications

(20 citation statements)

References 15 publications

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“…The low temperature TPD profile has been associated with different adsorption states of the hydrogen on bimetallic catalysts [33][34][35]. It is attributed to the occurrence of high temperature peaks to hydrogen spillover taking place during high temperature treatment of our catalysts.…”

Section: The Tpd/r Studymentioning

confidence: 86%

“…To obtain information about their active sites, temperature programmed desorption of hydrogen was performed on all the catalysts samples. The mechanism of adsorption/desorption of hydrogen are extremely complex [34,35] especially when dealing with bimetallic catalyst systems. This is because phenomena related to the interaction between different active phases can interfere.…”

Section: The Tpd/r Studymentioning

confidence: 99%

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Heterogeneous Supported Catalysts for Butadiene Polymerization: The Effect of Calcination Temperature and Solvent

Hussain¹,

Naheed²,

Badshah³

et al. 2010

TOCATJ

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Abstract:The polymerization of butadiene was studied using heterogeneous cobalt nickel (oxide) bimetallic catalyst. The prepared catalyst was subjected to calcination at different temperatures. This treatment results in the formation of different phases with multiple oxidation states. The characterization of the catalyst was carried out by XRD, SEM, EDX, TGA, FTIR and TPR/TPD. The catalytic activity was studied for the polymerization of butadiene gas in toluene, n-hexane and ethanol in a Parr reactor system. The products obtained, were characterized by FTIR, GC/MS, 1 H and 1 3 C NMR spectroscopy, Laser Light Scattering (LLS) and GPC.The best activity was achieved on the catalyst sample calcined at 1173 K in ethanol solvent. The product contains aliphatic and aromatic carbonyl compounds and polybutadiene terminated by OH group. The GPC and LLS studies indicates that polydispersity of the products are in the narrow range and high molecular weight product.The study reflects that the catalytic reaction conditions, the calcinations temperatures which control the oxidation state, phase of the catalyst and stability of the catalyst are mainly responsible for the change in products selectivity.

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Section: The Tpd/r Studymentioning

confidence: 86%

Section: The Tpd/r Studymentioning

confidence: 99%

Heterogeneous Supported Catalysts for Butadiene Polymerization: The Effect of Calcination Temperature and Solvent

Hussain¹,

Naheed²,

Badshah³

et al. 2010

TOCATJ

View full text Add to dashboard Cite

show abstract

“…The current trend is to immobilise the complex on a host support such as zeolites [13][14][15][16], macroporous carbon [17], polymers [12,18,19], or hydrotalcites [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Epoxidation of Cyclohexene With H2O2 and Acetonitrile Catalyzed by Mg–Al Hydrotalcite and Cobalt Modified Hydrotalcites

et al. 2009

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The paper presents a comparison between the results obtained for cyclohexene epoxidation in the presence of base catalysts: Mg 0/75 Al 0.25 -hydrotalcite (HT), the corresponding mixed oxide (CHT), the reconstructed hydrotalcite (RHT), a hydrotalcite containing cobalt in the brucite-type layer ((Co-Mg 0.75 )Al 0.25 )) and one containing cobalt complex-species supported on HT carrier (Co-complex/HT). The selective conversion of cyclohexene to the corresponding epoxide is closely related to the base strength of the catalysts.

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“…Most of these factors are linked with each other for example electric conductivity and heat conductivity, steric hindrance and substituents, crystallinity and solubility of reactants [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Morphology and Conductivity of Polymeric Support as the Key Factors Modifying Catalytic Activity of Keggin Type Heteropolyacids Dispersed in Poly(N-methylpyrrole) and Polypyrrole Matrices

et al. 2008

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This study concerns investigations of catalytic activity of heteropolyacids: H 4 SiW 12 O 40 and H 5 PMo 10 V 2 O 40 and their cupric and ferric salts deposited on conducting polymer supports: polypyrrole (PPy) and poly(N-methylpyrrole) (PMPy). Redox and acid-base properties of these catalysts were determined using a catalytic test reaction--conversion of isopropyl alcohol. The results of catalytic studies together with analysis of conductivity and morphology of catalysts show the influence of factors mentioned above on the activity in parallel dehydration and dehydrogenation reactions of isopropyl alcohol.

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Polymer supported cobalt(II) catalysts for alkene epoxidation

Cited by 37 publications

References 15 publications

Heterogeneous Supported Catalysts for Butadiene Polymerization: The Effect of Calcination Temperature and Solvent

Heterogeneous Supported Catalysts for Butadiene Polymerization: The Effect of Calcination Temperature and Solvent

Epoxidation of Cyclohexene With H2O2 and Acetonitrile Catalyzed by Mg–Al Hydrotalcite and Cobalt Modified Hydrotalcites

Morphology and Conductivity of Polymeric Support as the Key Factors Modifying Catalytic Activity of Keggin Type Heteropolyacids Dispersed in Poly(N-methylpyrrole) and Polypyrrole Matrices

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