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Showing 1 to 20 of 47 for “"1-hexene"”.
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Hydroesterification of 1-hexene
… the kinetics of the hydroesterification of 1-hexene was investigated. The catalyst system used in this study was generated in situ from a mixture of Pd(OAch/PPh3/methanesulfonic acid. Reactions were carried out in a 100ml Hastelloy autoclave at 90°C and 70 bar carbon monoxide pressure. The …
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Selective hydrogenation for industrial 1-hexene purification
… route to the purification of industrial 1-hexene streams. Even so, reported performance has been poor and, consequently, the principal aim of this study is to adjust operating conditions so as to improve process performance to an industrially interesting level. In particular, the influence …
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Selective hydrogenation for industrial 1-hexene purification
… route to the purification of industrial 1-hexene streams. Even so, reported performance has been poor and, consequently, the principal aim of this study is to adjust operating conditions so as to improve process performance to an industrially interesting level. In particular, the influence …
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Selective catalytic hydrogenation for industrial 1-hexene purification
Linear alpha-olefins, including 1-hexene, are used mainly as co-monomers in the production of polymers. The very low tolerance of the polymerisation catalyst to highly unsaturated impurities makes removal of these impurities from the olefin feedstock crucial. In South Africa, linear alpha-olefins …
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Selective deconstruction of polyethylene to propylene via isomerization/metathesis and 1-hexene isomerization studies
… the development of a kinetic understanding of 1-hexene isomerization, serving as a model PE system to capture the thermodynamic behavior of internal olefin redistribution. Finally, Chapter 4 reflects on the author’s experience as a Research Group Leader in the Summer Predoctoral Institute (SPI), …
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Evaluation of mass transfer in a catalytic distillation column using hydrogenation of 1 -hexene as a test reaction
The aim of this project is to evaluate experimentally the overall vapour/liquid mass transfer coefficient, and to develop a simple model for evaluating the effect of chemical reaction on the overall vapour/liquid mass transfer coefficient.
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Morphology, Crystallization and Melting Behaviors of Random Copolymers of Ethylene with 1-Butene, 1-Pentene and 1-Hexene
… ethylene/1-pentene and ethylene/1-hexene - were found to be identical to each other, suggesting that the crystallization process examined was independent of branch type for the ethyl, propyl and butyl branches examined. Since the lengthy butyl branch (in the ethylene-hexene …
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Kinetic studies of the metathesis of 1-hexene using Re2O7/γ-Al2O3 and the synthesis and metathesis of oxazolines
The kinetics of the metathesis of 1-hexene using Re2O7/-Al_2O_3 as the catalyst were investigated under a variety of conditions. The experiments were carried out under high vacuum conditions. The product solutions were characterised by gas liquid chromatography and mass spectroscopy. The initial …
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Morphology, Crystallization and Melting Behavior of Statistical Copolymers of Propylene with Ethylene, 1-Butene, 1-Hexene and 1-Octene
… propylene/1-butene, propylene/1-hexene and propylene/1-octene) has been examined. The multiple melting behavior has been correlated with the presence of alpha and gamma phases and with the occurrence of cross-hatching morphology. The Crystallization and melting behavior of …
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Mechanistic Studies of Rhodium Oxidation Catalysts
… These produce catalysts for the oxidation of 1-hexene to 2-hexanone, and are more stable to deactivation than the analogous homogeneous reaction using {Rh(CO)(,2)S'(,n)}BF(,4). The O(,2) oxidation of {Rh(CO)(,2)Cl}(,2) was studied as part of an investigation to determine the character of the …
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Oligomerization of higher olefins
… tested for the oligomerization of ethylene and 1-hexene. The chromium complexes were tested for the oligomerization of 1-hexene.
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Early transition metal catalysts for the living polymerization of olefins and alkynes
… prepared and employed in the polymerization of 1-hexene. Hafnium Ziegler-Natta catalysts containing the [(2,6- X2C6H3NHCH2)2C(CH3)(2-C5H4N)] ([Arx2NPy]2-) (X = Cl or F) ligand were also prepared for use in 1-hexene polymerization studies. Compounds of the type [Ligand]MR2 (R = Me, i-Bu) were …
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Ni(II) and Pd(II) based catalysts for α-olefin polymerisation
… and used in homopolymerisation of ethylene and 1-hexene at room temperature.
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Studies on Methylaluminoxane Catalyst Activators
… catalytic efficiency by kinetic studies on 1-hexene. The primary aim was to produce MAO soluble in aliphatic hydrocarbons by addition of branched or long chain aluminium trialkyls, which proved to be effective solubilizing agents, and by modification of MAO with long chain silanols. Addition …
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Liquid phase hydroformylation by zeolite supported rhodium
… catalysts for liquid phase hydroformylation of 1-hexene in order to study the effects of zeolite immobilization. NaX zeolite was cation exchanged with several rhodium salts and used as hydroformylation catalysts at 50°C and 125°C in the presence of: triphenylphosphine (PPh₃), …
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Early transitional metal alkyl, alkylidene, and alkylidyne chemistry
… active initiators for the polymerization of 1-hexene. Similar activation of [t- BuNNPhNMes]MMe2 (M = Zr or Hf) gives rise to dimeric monocations that eventually break-up and react further to yield cationic monomethyl species. In all cases the poly[1-hexene] produced in the presence of the …
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Dimerization of naphtha-range Fischer-Tropsch olefins into diesel-range products over zeolite H-ZSM-5 and amorphous silica-alumina
In this study, the dimerization of 1-hexene and 1-octene (as model compounds for Fischer-Tropsch naphtha-range olefins) into diesel-range olefins was carried out in a tubular, continuous flow fixed-bed reactor, in the liquid phase, over zeolite H-ZSM-5 and an amorphous silica-alumina (ASA) …
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Production of mid-chain branched detergent-range olefins over shape-selective acid catalysts
… were screened for the dimerization of 1-hexene, under generally mild conditions, viz. 150 - 170°C, 20 - 40 bar and 1 - 4h-1 WHSV. It was postulated that shape-selective catalysts with defined pore sizes might improve selectivity towards mid-chain mono-methyl branched olefins. Such olefins …
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Part One: Catalytic Reactions of Anion-Exchange Resin Bound Dodecarhodium Triacontacarbonyl Dianion and Its Derivatives and Part Two: Properties and Reactions of Neutral Non-Polar Solvent Soluble Binuclear Complexes
… activity for the hydroformylation of of 1-hexene, accompanied by extensive isomerization of the substrate to 2-hexene, at 100 C and 8 atm of H(,2)/CO.
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