Catalyst system for preparing 1-octene through ethylene selective oligomerization and preparation method and application thereof

An ethylene oligomerization and selective technology, applied in chemical instruments and methods, physical/chemical process catalysts, compounds of elements of Group 5/15 of the periodic table, etc., can solve the problem of high oligomer content, 1-octene selection sexuality issues

Active Publication Date: 2019-11-22
迈瑞尔实验设备(上海)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of catalyst system that is used for the selective oligomerization of ethylene to prepare 1-octene, to solve the low selectivity of 1-octene in the ethylene oligomerization reaction in the prior art, oligomer content is still relatively high high technical issues

Method used

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  • Catalyst system for preparing 1-octene through ethylene selective oligomerization and preparation method and application thereof
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  • Catalyst system for preparing 1-octene through ethylene selective oligomerization and preparation method and application thereof

Examples

Experimental program
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preparation example Construction

[0046] Preparation of Ligand Compound 1

[0047]The preparation of 2,5-bis(2-diphenylphosphine-phenyl)aniline: add (2-bromophenyl)-diphenylphosphine (2.4g , 7mmol, analytically pure, purchased from Aladdin Reagent Company), 2,5-diaminophenylboronic acid (633mg, 3.5mmol, analytically pure, purchased from Aladdin Reagent), [1,1′-bis(diphenylphosphine Base) ferrocene] palladium dichloride (143mg, 0.18mmol, analytically pure, purchased from Aladdin reagents), anhydrous potassium phosphate (2.3g, 11.5mmol, analytically pure, purchased from Aladdin reagents). Transfer the sealed tube to a glove box with an argon atmosphere, add 30 mL of anhydrous 1,4-dioxane (analytical grade, purchased from Aladdin reagent), seal the sealed tube with a cock, take it out, and heat it in an oil bath for 100- React at 105°C for 16 hours. Heating was stopped, and after cooling to room temperature, 20 mL of water was added to quench the reaction, the aqueous phase was extracted with ethyl acetate (ana...

Embodiment 1

[0051] This example provides a catalyst system for the selective oligomerization of ethylene to produce 1-octene, which includes three components: ligand A, transition metal compound B, and activator C;

[0052] The ligand A is 2,5-bis(2-diphenylphosphine-phenyl)aniline (ligand compound 1), and the transition metal compound B is CrCl 3 (THF), activator C is methylaluminoxane (MAO);

[0053] The above-mentioned catalyst system is used for ethylene oligomerization to prepare 1-octene, and the specific steps are as follows:

[0054] Step 1: Add 100mL cyclohexane and MAO (Al: 5.0mmol) into a 300mL stainless steel reactor replaced by nitrogen, then heat to a temperature of 50°C;

[0055] Step 2: In a nitrogen atmosphere glove box, the CrCl in 20mL toluene 3 (THF) 33.7mg (0.010mmol) was added to a 50mL flask, followed by 6.1mg (0.010mmol) of 2,5-bis(2-diphenylphosphine-phenyl)aniline (ligand compound 1), at room temperature Stir the mixture for 5 min, then add it to the stainless...

Embodiment 2

[0058] The difference between this embodiment and Example 1 is that ligand A is ligand compound 2 (C34H33NP 2 ), the addition amount is 5.2mg (0.010mmol). The quality and proportion of various products obtained, and the catalyst activity are shown in Table 1.

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Abstract

The invention provides a catalyst system for preparing 1-octene from ethylene, which comprises three components: a ligand A, a transition metal compound B and an activating agent C, wherein the structural formula of the ligand A is shown in the specification, and the transition metal compound B is a group IVB-VIII metal compound; and the activating agent C is selected from an organic aluminum compound or an organic boron compound. When the catalyst system is used for ethylene oligomerization, the catalyst system has excellent selectivity for preparing 1-octene through ethylene tetramerizationand relatively low oligomer generation amount, and has relatively clear application prospect in the technical field of preparation of 1-octene through ethylene oligomerization.

Description

technical field [0001] The present invention relates to a catalyst system for the tetramerization of ethylene and a process for the preparation of 1-octene by tetramerization of ethylene using the catalyst system. Background technique [0002] 1-octene is a kind of advanced α-olefin. When it is used as a comonomer for ethylene polymerization, the copolymer has excellent mechanical properties and is regarded as an important direction for upgrading polyethylene products. In recent years, high-purity The demand for 1-octene is growing rapidly. In the prior art, 1-octene and other higher linear α-olefins are obtained by ethylene oligomerization. However, in the conventional ethylene oligomerization technology, the product generally contains a variety of higher α-olefins, which conform to the Schulz-Flory distribution or Poisson distribution, and the selectivity to 1-octene is not high. For example, U.S. Patent No. 6,184,428 discloses a nickel-based catalyst comprising 2-diphen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/24C07F9/50C07F9/6568C07C2/36C07C11/02
CPCB01J31/2409B01J31/248C07F9/65683C07F9/5022C07C2/36B01J2531/62C07C11/02
Inventor 朱博源
Owner 迈瑞尔实验设备(上海)有限公司
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