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Naphthoxy mono-metallocene transition metal compound, catalyst composition containing same and application of catalyst composition

A technology of transition metals and compounds, applied in the direction of titanium organic compounds, etc., can solve the problem of low activity

Active Publication Date: 2021-04-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mono-titanocene compound 3 (see formula 3 above) was synthesized with bridging diphenol as the bidentate ligand, which was used to catalyze the polymerization of ethylene with low activity (Organometallics 2006, 25, 4358)

Method used

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  • Naphthoxy mono-metallocene transition metal compound, catalyst composition containing same and application of catalyst composition
  • Naphthoxy mono-metallocene transition metal compound, catalyst composition containing same and application of catalyst composition
  • Naphthoxy mono-metallocene transition metal compound, catalyst composition containing same and application of catalyst composition

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Embodiment 1

[0064] The synthesis of embodiment 1 pentamethylcyclopentadienyl-1-naphthyloxy-titanium dichloride

[0065] Put the magnetron into a dry 250 ml three-necked flask, place the reaction flask in a magnetic stirring device; vacuumize the three-necked flask and rinse it with nitrogen repeatedly three times. And add pentamethylcyclopentadienyl-titanium trichloride 0.63 grams under nitrogen atmosphere, add 20 milliliters of dry dichloromethane to dissolve, 1-naphthol 0.31 grams are dissolved in 20 milliliters of dry dichloromethane, room temperature Slowly add the above-mentioned three-neck flask under stirring, and react at room temperature for 24 hours. The solvent was removed in vacuo at room temperature to obtain a dark red solid, which was extracted with dry toluene and filtered with a diatomaceous earth filter aid to obtain a dark red toluene solution, which was frozen and crystallized at -25°C to obtain 0.71 g of dark red crystals. That is, pentamethylcyclopentadienyl-1-napht...

Embodiment 2

[0067] The synthesis of embodiment 2 cyclopentadienyl-1-naphthyloxy-titanium dichloride

[0068] Put the magnetron into a dry 250 ml three-necked flask, place the reaction flask in a magnetic stirring device; vacuumize the three-necked flask and rinse it with nitrogen repeatedly three times. And add 0.41 grams of cyclopentadienyl-titanium trichloride under nitrogen atmosphere, add 20 milliliters of dry dichloromethane to dissolve, dissolve 0.27 grams of 1-naphthol in 20 milliliters of dry dichloromethane, add slowly at room temperature The aforementioned three-neck flask was stirred and reacted at room temperature for 24 hours. The solvent was removed in vacuo at room temperature to obtain a black solid, which was extracted with dry toluene and filtered with diatomaceous earth filter aid to obtain a toluene solution, which was frozen and crystallized at -25°C to obtain 0.55 g of black-red crystals. That is cyclopentadienyl-1-naphthyloxy-titanium dichloride, and its molar yiel...

Embodiment 3

[0070] Synthesis of embodiment 3 cyclopentadienyl-(2,4-dichloro-1-naphthyloxy)-titanium dichloride

[0071] Put the magnetron into a dry 250 ml three-necked flask, place the reaction flask in a magnetic stirring device; vacuumize the three-necked flask and rinse it with nitrogen repeatedly three times. And add 0.54 grams of cyclopentadienyl-titanium trichloride under nitrogen atmosphere, add 20 milliliters of dry dichloromethane to dissolve, and dissolve 0.53 grams of 2,4-dichloro-1-naphthol in 20 milliliters of dry dichloromethane Chloromethane was slowly added into the aforementioned three-neck flask at room temperature, and reacted at room temperature for 24 hours under stirring. The solvent was removed in vacuo at room temperature to obtain a deep red solid, which was extracted with dry toluene and filtered with a diatomaceous earth filter aid to obtain a toluene solution, which was frozen and crystallized at -25°C to obtain 0.90 g of wine red crystals. That is cyclopenta...

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Abstract

The invention relates to a naphthoxy mono-metallocene transition metal compound, a catalyst composition containing the naphthoxy mono-metallocene transition metal compound, and application of the catalyst composition. The naphthoxy mono-metallocene transition metal compound structurally contains naphthoxy, a Cp' ligand and a transition metal, and thenaphthoxy group and the Cp' ligand are respectively connected with the transition metal to form the naphthoxy mono-metallocene transition metal compound. The catalyst composition comprises the naphthoxy mono-metallocene transition metal compound and alkylaluminoxane, and can be used in a polymerization catalyst for olefin polymerization, wherein in the polymerization system, the concentration of the mono-metallocene transition metal compound in the polymerization system is 1*10<-8>-1*10<-3> mol / L. The naphthoxy mono-metallocene transition metal compound is simple to prepare, and when the catalyst composition containing the naphthoxy mono-metallocene transition metal compound is used for olefin polymerization, a polymer with high molecular weight and narrow molecular weight distribution can be obtained.

Description

technical field [0001] The invention belongs to the fields of organic synthesis, catalysis and olefin polymerization, and in particular relates to a naphthyloxy-containing monolocene transition metal compound, in particular to a naphthyloxy monolocene transition metal compound, a catalyst composition containing the same and its application . Background technique [0002] Metallocene catalysts for olefin polymerization have been a research hotspot in organometallic chemistry, catalysis, polymer chemistry and materials science in recent decades. Because this type of catalyst is used, olefin polymers with uniform molecular weight distribution and chemical composition distribution can be obtained, and the molecular structure and molecular weight of the polymer can be highly controlled by adjusting the catalyst structure. Through metallocene catalysts, olefin polymers that cannot be obtained by traditional Ziegler-Natta catalysts can be obtained, such as linear low-density polye...

Claims

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Application Information

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IPC IPC(8): C07F7/28C08F110/02C08F210/16C08F210/14C08F4/6592
Inventor 王伟曲树璋陈珺娴张韬毅范国强郑刚
Owner CHINA PETROLEUM & CHEM CORP
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