Mesoporous molecular sieve carried olefin polymerization catalyst, preparation method and application thereof

A mesoporous molecular sieve and olefin polymerization technology, applied in the production of bulk chemicals, etc., can solve the problems of detonation polymerization, difficulty in controlling the polymer shape, sticking to the kettle, etc., and achieve the effect of high molecular weight, high melting point, and high catalytic activity

Inactive Publication Date: 2007-03-07
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The main performance is that the high activity of the catalyst causes serious "explosion" and sticking phenomenon in the polymerization process, it needs to use a large amount of expensive co-catalyst methyl aluminoxane (MAO), and the shape of the polymer is difficult to control, etc.

Method used

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  • Mesoporous molecular sieve carried olefin polymerization catalyst, preparation method and application thereof
  • Mesoporous molecular sieve carried olefin polymerization catalyst, preparation method and application thereof
  • Mesoporous molecular sieve carried olefin polymerization catalyst, preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0029] The preparation of embodiment 1 transition metal Ti (IV) semi-sandwich locene compound homogeneous catalyst:

[0030] -78°C, add 40ml ether solvent to the ligand 5mmol 4-methyl-2,6-di-tert-butylphenolate and 5mmol titanocene solid mixture, stir slowly to room temperature, react for 8 hours and filter , and dry the solvent in vacuo. The residue was dissolved in a small amount of CH 2 Cl 2 Add a small amount of ether or n-hexane to the upper layer, and refrigerate at -30°C to obtain red microcrystalline CpTi(OAr)Cl 2 (Ar=4-Me-2,6- t Bu 2 C 6 h 2 ), yield 83%.

Embodiment 2

[0031] The preparation of embodiment 2 transition metal Zr (IV semi-sandwich locene compound homogeneous catalysts:

[0032] -78°C, slowly add 5 mmol of 4-methyl-2,6-di-tert-butylphenolate toluene solution of the ligand dropwise into 5 mmol of trichloro-zirconocene n-hexane suspension, and slowly warm up to room temperature while stirring , filtered after 12 hours of reaction, and vacuum-dried the solvent. The residue was extracted with a large amount of n-hexane, concentrated, and refrigerated at -30°C to obtain yellow microcrystalline CpZr(OAr)Cl 2 (Ar=4-Me-2,6- t Bu 2 C 6 h 2 ), yield 78%.

Embodiment 3

[0033] Preparation of embodiment 3 supported olefin polymerization catalyst:

[0034]Weigh 3.0 g of mesoporous molecular sieve SBA-150, and keep it under vacuum for 8 to 10 hours at 150 to 180 °C; after cooling to room temperature, add 20 mL of toluene; then add 10 mL of MAO, stir at room temperature for 20 h, filter, wash the solid with toluene three times, and then Mix with a toluene solution containing 0.052g of homogeneous catalyst titanium (IV); continue to stir for 18 to 20 hours, centrifuge, wash with toluene, and dry in vacuo to obtain the loaded catalyst component A, with a titanium content of 0.364wt %.

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Abstract

The invention discloses an olefin polymeric catalyst and preparing method and reacting technology, which is characterized by the following: the expression formula of catalyst is [SiO2-Cat], wherein Cat represents semi-sandwich homogeneous phase catalyst of transient element metallic titanium (IV) or zirconium (IV); SiO2 represents dielectric molecular sieve SBA-15 decorated by methyl alundum alkyl, which can synthesize polyethylene; the catalyst possesses high ethylene polymeric activity, which displays ultrahigh molecule with different patterns.

Description

technical field [0001] The invention belongs to the technical field of olefin polymerization catalysts, and in particular relates to a mesoporous molecular sieve-supported olefin polymerization catalyst and its preparation method and application. Background technique [0002] As a pillar industry of modern polymer materials, the development of polyolefin industry is an important symbol to measure the development of a country's petrochemical industry, and olefin polymerization catalysts are the key and core of the development of polyolefin industry. Polyolefin products with specific morphology and properties can be obtained by modifying the structure of the catalyst. Therefore, the research and development of catalysts is the driving force behind the renewal and continuous improvement of polyolefin products. Since the advent of olefin polymerization catalysts in 1953, three major catalytic systems have been developed: Ziegler-Natta catalytic system, metallocene catalytic sys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/02C08F4/642
CPCY02P20/52
Inventor 金国新陈凤太
Owner FUDAN UNIV
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