Ethylene trimerization reaction
When ethylene trimerization reaction was carried out using this catalyst system in toluene at 120 °C and 50 bar of ethylene pressure, 74.5% of C 6 with 1-hexene selectivity of 99.8% and 18% of the polymer was observed. Under this condition, the catalyst activity was found to be low, ~ 3654 g C/g Cr/h. See more The real breakthrough was achieved with the discovery of Phillips trimerization catalyst, which contained a pyrrole type ligand along with chromium compound and activators, i.e., alkyl aluminums. The ethylene trimerization … See more In the early 2000, British Petroleum developed a chromium-based ethylene trimerization system with diphosphazane ligands of the type Ar2PN(Me)PAr2, where Ar is an O-methoxy … See more With an objective to improve the existing Phillips catalytic system, Mitsubishi chemical corporation reported various Cr-Pyrrole-based systems for trimerization of ethylene. The … See more In 1998, Institut Francais du Petrole (IFP) developed a new class of ligands, i.e., aryloxides for selective ethylene trimerization to 1-hexene. The catalyst composition, described in IFP’s patent application, is … See more WebNov 17, 2004 · While there exists several processes for producing 1-hexene via ethylene trimerization, a similar route for the selective production of 1-octene has so far been …
Ethylene trimerization reaction
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WebAt ethylene pressures of higher than 3 bar the formed 1-hexene and 1-octene condensed inside the porous system, thereby facilitating the dissolution and redistribution of the Cr–PNP catalyst. Further studies were conducted at pressures up to 35 bar at which a change in the primary reaction selectivity from 1-hexene to 1-octene could be observed. WebMar 18, 2024 · We explore the trimerization mechanism for ethylene first and, later on for comparison, we extend the potential energy surfaces (PES) for the tetramerization of …
WebMar 11, 2012 · The ethylene trimerization reaction was carried out under the desired temperature and ethylene pressure. When the reaction finished, the reaction products were weighted and filtrated. The liquid products were then encapsulated and analyzed by gas chromatography (GC), in order to confirm the selectivity of 1-hexene, the solid … WebOligomerization. Axens homogeneous oligomerization technologies rely on strong expertise accumulated over 50 years in order to provide the most efficient and cost-effective solutions to produce high purity 1-Butene and 1-Hexene via ethylene dimerization and trimerization, as well as octenes by means of butenes dimerization. Select an application.
WebApr 5, 2014 · The ethylene trimerization reaction predominantly produces 1-hexene, which is chiefly used as a comonomer in polyethylene production. The reaction, which … WebFeb 2, 2024 · After 200 min, the co-trimerization was quenched with DGBCF (0.1 g, 0.53 mmol) in 2 mL THF. The reaction was monitored with 13 C NMR spectroscopy and the product was characterized with FT-IR spectroscopy (see ESI†). After that, the NCO content of the PIR prepolymer was titrated and the prepolymer was used for casting elastomers …
WebAug 1, 2007 · The dendritic nickel complex revealed the selectivity of higher olefins (C10-C14) reached up to 93% and the catalytic activity was 0.99×106 g/(mol Ni·h) at the reaction time of 60 min, ethylene ...
WebJan 3, 2024 · On purpose, selective oligomerization of ethylene to its linear trimer and tetramer such as 1-hexene and 1-octene has assumed significant commercial interest. … cinvest / a\u0026a international investmentWebNov 17, 2004 · While there exists several processes for producing 1-hexene via ethylene trimerization, a similar route for the selective production of 1-octene has so far been elusive. We now, for the first time, report an unprecedented ethylene tetramerization reaction that produces 1-octene in selectivities exceeding 70%, using an aluminoxane … cinvestav university mexicoWebMar 18, 2024 · We explore the trimerization mechanism for ethylene first and, later on for comparison, we extend the potential energy surfaces (PES) for the tetramerization of ethylene with both catalysts. ... In the present theoretical study, we explore the tri- and tetramerization reactions of ethylene by applying density functional theory using ortho - … c# invert boolWebAug 26, 2024 · The chloro compounds of geminal chloro groups greatly improved the catalytic activity and 1-hexene selectivity of ethylene trimerization reaction.Some specific interaction modes of chloro groups ... dialogflow searchWeb毛国梁，刘振华，郑斌茹，黄 强，宁英男 (东北石油大学化学化工学院 石油与天然气化工省重点实验室，黑龙江 大庆 163318) cinvestav wikipediaWebPROBLEM TO BE SOLVED: To provide an ethylene trimerization catalyst that is capable of suppressing adhesion of by-product polymers to the walls of reactors or stirrers in the trimerization reaction of ethylene and capable of efficiently producing 1-hexene. SOLUTION: The ethylene trimerization catalyst is obtainable by bringing a complex for ... cinvestav outlookWebReaction of a trimethyl titanium complex, (FI)TiMe 3 (FI = phenoxy-imine), with 1 equiv of B(C 6 F 5) 3 gives [(FI)TiMe 2][MeB(C 6 F 5) 3], an effective precatalyst for the selective trimerization of ethylene.Mechanistic studies indicate that catalyst initiation involves generation of an active Ti II species by olefin insertion into a Ti–Me bond, followed by β … c invest ifs