Valorization of α-olefins: Double bond shift and skeletal isomerization of 1-pentene and 1-hexene on zirconia-based catalysts

Coleto, Inés; Roldán, Rafael; Jiménez‐Sanchidrián, César; Gómez, Juan Pedro Montávez; Romero–Salguero, Francisco J.

doi:10.1016/j.cattod.2009.06.017

Cited by 21 publications

(12 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Also, he announced that conversion of 1-hexene over various acid catalysts showed that cracking only became significant at temperatures above 548-573 K [2]. Coleto et al [16] suggested also that, at low temperature (\573 K) and in gas phase, the main reaction of transformation of 1-hexene over Pt/ZrO 2 -SO 4 is double-bond shift with respect to skeletal isomerization. Besides, not only temperature indicated that 1-hexene molecular transformation took place, but also the acid strength and pressure among others variables.…”

Section: Calculationsmentioning

confidence: 97%

Liquid-Phase Oligomerization of 1-Hexene Catalyzed by Macroporous Ion-Exchange Resins

et al. 2011

View full text Add to dashboard Cite

Oligomerization of pure 1-hexene catalyzed by macroporous ion-exchange resins was performed in batch experiments at 350-390 K and 2 MPa. At 373 K, after 6 h, 1-hexene conversion was practically complete and the selectivity to dimers was 56%, that to trimers 0.8 and 43.2% to double-bond isomerization. By assuming an homogeneous kinetic model for olefin dimerization of second order reaction, a value of 64-68 kJ mol -1 for apparent activation energy was obtained.

show abstract

Section: Calculationsmentioning

confidence: 97%

Liquid-Phase Oligomerization of 1-Hexene Catalyzed by Macroporous Ion-Exchange Resins

et al. 2011

View full text Add to dashboard Cite

show abstract

“…The carbon-carbon double bond migration in terminal olefins, to produce internal alkenes, has been promoted by Ru-carbene complexes [3]. Heterogeneous catalysts have also been used in the isomerization of alpha olefins [4]. In vegetable oils, the isomerization of carbon-carbon double bonds to produce conjugated species was first reported as a side reaction during the bleaching of vegetable oils [5].…”

Section: Introductionmentioning

confidence: 99%

“…Finding procedures that can lead to a reusable catalyst for the conjugation/isomerization of mono-and polyenes represents a key step towards the development of more environmentally friendly technologies for preparing olefins and conjugated polyenes of all types. Many alternatives to homogeneous catalysts have been proposed, including solid catalysts [4,6,7] and I 2 /UV catalyzed processes [14]. More recently, polymer-bound complexes [15], and active species tethered to inorganic supports [16] have shown reactivities similar to their homogeneous counterparts, with the advantage of being more easily recoverable.…”

Section: Introductionmentioning

confidence: 99%

Rh‐based Biphasic Isomerization of Carbon–Carbon Double Bonds in Natural Oils

Quirino

Larock

2011

J Americ Oil Chem Soc

View full text Add to dashboard Cite

The biphasic conjugation of soybean and other natural oils, as well as the isomerization of various alkenes, was examined using a rhodium catalyst. A maximum yield, of conjugated soybean oil, of 96% was obtained when the reaction was run at 80°C under argon with ethanol as the polar solvent, using triphenylphosphine monosulfonate sodium salt (tppms) as the ligand, and the surfactant sodium dodecyl sulfate (SDS). The optimized conditions were tested with other substrates, and the products were analyzed by 1 H NMR, GC/MS, and ICP-MS.

show abstract

“…Suitable catalysts for olefins hydrogenation should contain at least one of transition metals, belonging to group VIII of periodic table, as the active component, monometallic or bimetallic systems being most frequently used for this purpose [1][2][3][4][5]. Ni is often used as the main metal component but sometimes it takes part of a catalyst modifier [4,5].…”

Section: Introductionmentioning

confidence: 99%

Egg-shell Ni/Al2O3 Catalyst for the Hydrogenation of Mixed C5 Alkenes

Kolena¹,

Šťávová²,

Morávek³

et al. 2017

ujc

View full text Add to dashboard Cite

A process of Ni/Al 2 O 3 eggshell type catalyst preparation has been developed in laboratory scale. Active catalysts with high Ni content, in which the active metal is concentrated in a very thin layer below the particle surface, were prepared by this process. Wet impregnation of carrier particles with a solution of inorganic Ni salt in organic solvent, in particular ethanol and acetone, was the basic principle of the preparation method. Catalysts with a maximum Ni content of 20.9 mass %, concentrated into a layer of thickness of 770 µm were prepared when ethanol was used as the solvent, while 15.4 % Ni maximum concentration and 622 µm layer thickness were achieved when acetone was used as the solvent. The catalysts prepared were characterized by following analytical methods: XRD, BET, Raman spectroscopy and EDS. The catalysts activities were tested in the gas phase C 5 olefins hydrogenation. Despite the lower Ni content, the catalyst impregnated by Ni nitrate, dissolved in acetone was characterized by higher activity in comparison with the catalyst impregnated by ethanol solution.

show abstract

Valorization of α-olefins: Double bond shift and skeletal isomerization of 1-pentene and 1-hexene on zirconia-based catalysts

Cited by 21 publications

References 27 publications

Liquid-Phase Oligomerization of 1-Hexene Catalyzed by Macroporous Ion-Exchange Resins

Liquid-Phase Oligomerization of 1-Hexene Catalyzed by Macroporous Ion-Exchange Resins

Rh‐based Biphasic Isomerization of Carbon–Carbon Double Bonds in Natural Oils

Egg-shell Ni/Al<sub>2</sub>O<sub>3</sub> Catalyst for the Hydrogenation of Mixed C<sub>5</sub> Alkenes

Contact Info

Product

Resources

About