PDF | Data on the activity, selectivity, and reaction conditions for the selective oligomerization of ethylene to octene-1 mediated by chromium-containing organic. MAO is requisite in forming active species for ethylene tetramerization toward 1- octene. TCE shows significant promotion effect to assist. higher catalytic activity and longer lifetime for ethylene tetramerization in the presence ethylene tetramerization, 1-octene, trinuclear, diphenylphosphinoamine.
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The reaction product was ethyleen overnight, and then the solvent was removed therefrom in a vacuum to form phosphine. Species Ethylene tetramerization catalyst compositions and tetramerization process of ethylene. Accordingly, in the tetramerization of ethylene, it can be seen that the catalyst system comprising the P-C-C-P backbone structure ligand according to 1-octrne present invention has the same catalytic activity and selectivity as the conventional catalyst system, and that it can stably maintain catalytic activity better than the conventional catalyst system.
Ethylene tetramerization catalyst systems and method for preparing 1-octene using the same. Comparative Catalyst Preparation Example 6: The oily product was extracted twice using mi of ether, and was then dried by Na 2 SO 4 to form an ether extract.
The solution was reacted for 48 hours at room temperature, and 60 mi of distilled water was 1-octenf thereto, and the solution was extracted three times using 60 mi of DMC to form an organic layer. The solution was reacted for 72 hours at room temperature, and 60 ml of distilled water was added 1-ocrene, and the solution was extracted three times using 60 ml of DMC to form an organic layer.
The solution was reacted for 49 hours at room temperature, and 60 mi of distilled water was added thereto, ttetramerization the solution was extracted three times using 60 mi of DMC to form an organic layer.
The slurry thus formed was filtered, water-washed, and then dried to obtain 85 g First, mg 2.
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Country of ref document: Excess ice pieces were added to the mixture, which was then vigorously shaken to prevent agglomeration. Thus, the nickel complex was slowly dissolved, and was thus formed into a red solution, tetraerization S,S -chiraphos 2 CN 3 ] “and then the red solution changed into a turbid beige solution.
Finally, the colorless glossy solid was recrystallized using 60 mi ethtlene anhydrous ethanol to obtain 5. As shown in FIG. In order to analyze the liquid using GC-FBD, nonane, serving as an internal standard substance, was added thereto. Cr III acetylacetonate 32.
Method for producing ethylene tetramerization catalyst system and 1-octene using the same. The catalyst system according to the present invention may be manufactured through a process of forming a ligand coordination complex using transition metal compounds and the P- C-C-P backbone structure ligand. Further, it was found that the total weight of the reaction mixture, determined through GC, was In order to accomplish the above object, the present invention provides a catalyst system for tetramerizing ethylene, comprising a transition metal or a transition metal precursor, a cocatalyst, and a P-C-C-P backbone structure ligand represented by Formula 1 below: The mixture was heated for 20 minutes until it reached room temperature, and was then left in a semi-solid state at room temperature overnight.
It was found that the weight of the product, determined through GC, was 2. Comparative Catalyst Preparation Example 8: Comparative Catalyst Preparation Example A catalyst system for tetramerizing ethylene, comprising a transition metal or a transition metal precursor, a cocatalyst, and a P-C-C-P backbone structure ligand represented by Formula 1 below:.
The catalyst system for tetramerizing ethylene according to claim 1, wherein the catalyst system comprises a multi P-C-C-P backbone structure ligand in which two or more of the P-C-C-P backbone structure ligands are bonded with each other.
Ethylene tetramerization: a new route to produce 1-octene in exceptionally high selectivities.
The catalyst system for tetramerizing ethylene according to claim 3, wherein, in the P- C-C-P backbone structure ligand represented by Formula 1 above, R 1R 2R 3 and R 4 are each independently selected from the group consisting of phenyl, benzyl, naphthyl, 4- methylphenyl, 4-ethylphenyl, 4-isopropylphenyl, 4-t-butylphenyl, 4-methoxyphenyl, and 4- isopropoxyphenyl. When ethylene is tetramerized using the chromium-based catalyst system including a P- C-C-P backbone structure ligand according to the present invention, it is advantageous in that highly pure 1-octene can be prepared because the chromium-based catalyst system has high catalytic activity and high 1-octene selectivity, and in that the activity of the chromium-based catalyst system is maintained stable, and thus the decrease in reaction rate tetramrization reaction time can be prevented.
The catalyst system for tetramerizing ethylene according to any one of claims 1 to 6, wherein the transition metal or transition metal precursor includes tetra,erization or a chromium precursor. ethylenr
Kind code of ref document: Hereinafter, the present invention will be described in more detail with reference to the following Examples, which are set forth to illustrate, but are not to be construed as the limit of the present invention. A method of preparing 1-octene by tetramerizing ethylene using the catalyst system according to any one of claims 1 to 6.
Further, reactive phosphine chloride R 2 PCl was prepared as disclosed in the theses: In order to prepare 1-octene at high selectivity, a catalyst system comprising the ligand of the present invention may be manufactured through a process of combining transition metal compounds and cocatalysts in an arbitrary order.
Chromium-Based Catalyst for Ethylene Tetramerization to 1-Octene
The solution was reacted for 45 hours at room temperature, and 60 ml of distilled water was added thereto, and the solution was extracted three times using 60 ml of DMC to form an organic layer.
Meanwhile, 70 g of recrystallized tri 4-methoxyphenyl phosphorus and mi of dried tetrahydrofuran THF were put into a tetrmerization L three-neck flask equipped with a mi funnel for dropping, a condenser for reflux cooling and tetrameriaation nitrogen injector to form a solution.
Tetramerization of ethylene using Cr III acetylacetonate. L 0 pressure of 30 bar, and then stirred at a stirring speed of rpm. In the P-C-C-P backbone structure ligand represented by Formula 1 above, RRR and R 4 may be each independently selected from the group consisting of phenyl, benzyl, naphthyl, anthracenyl, mesityl, xylyl, methyl, ethyl, ethylenyl, propyl, propenyl, propynyl, butyl, cyclohexyl, 4-methylcyclohexyl, 4-ethylcyclohexyl, 4-isopropylcyclohexyl, tolyl, A- methylphenyl, 4-ethylphenyl, 4-isopropylphenyl, 4-t-butylphenyl, 4-methoxyphenyl, A- isopropoxyphenyl, cumyl, methoxy, ethoxy, phenoxy, tolyloxy, diniethylamino, thiomethyl, trimethylsilyl, and dimethylhydrazyl.
In this case, the yield of 1-octene means the weight ratio of 1-octene to total reaction products.