Metal composite catalyst for alkene polymerization and preparation method thereof

A technology for metal composite and olefin polymerization, applied in the field of metal composite catalysts and their preparation, can solve the problems of not being able to give full play to their advantages, and achieve the effect of broad application prospects.

Active Publication Date: 2007-10-03
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the research of combining the two has been carried out, such as: CN 1113900C, CN1413222A, the technical scheme disclosed by CN1301601A, but it is mostly a mixed product obtained by mixing metallocene compound with heterogeneous Ziegler-Natta catalyst and distilling off the solvent , rather than a true combination of
Mixed catalysts work at the same time during polymerization, and what is obtained is a mixed polymer produced by the two catalysts. In addition to obtaining a polymer with a wide molecular weight distribution during the reaction, it is difficult to give full play to the advantages of the two.

Method used

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  • Metal composite catalyst for alkene polymerization and preparation method thereof
  • Metal composite catalyst for alkene polymerization and preparation method thereof

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preparation example Construction

[0036] Part I Preparation of Metal Composite Catalysts

[0037] In the present invention, Me=methyl, Ph=phenyl, Cp=cyclopentadienyl, Ind=indenyl, H 4 Ind=4,5,6,7-tetrahydroindenyl, Flu=fluorenyl, Naph=naphthyl, rac=racemate

Embodiment 1

[0038] Embodiment 1, the preparation of metal composite catalyst

[0039] 1. Spherical MgCl 2 Preparation of vector

[0040] 0.25mol of anhydrous MgCl 2 Add 0.5mol of absolute ethanol, 390ml of white vaseline oil, and 10ml of silicone oil into the autoclave, heat to 80°C and stir to obtain a uniform solution, blow nitrogen to raise the pressure to 1MPa, open the valve, and let the mixture in the kettle pass through 1.2mm, length 3.5 M thin tube, sprayed into 2.5L kerosene, washed 5 times with hexane, and dried at room temperature.

[0041] 2. Preparation of spherical Ziegler-Natta catalyst

[0042] Take MgCl 2 Add 2g of the carrier into the preparation bottle, blow in argon after vacuum, then add 100ml of TiCl at -20°C 4 , when the temperature was raised to 60°C with stirring, 0.5 g of 9,9-bis(methoxymethyl)fluorene (BMF) was added, and the mixture was stirred for 2 hours. Vacuum filter, add 100ml TiCl 4 , heated up to 120°C, and treated for 2 hours. Washed 6 times wit...

Embodiment 2

[0045] Embodiment 2, the preparation of metal composite catalyst

[0046] 1. Spherical MgCl 2 Preparation of vector

[0047] 0.25mol of anhydrous MgCl 2 Add 1.25mol of propanol into the autoclave, heat to 150°C and stir to obtain a homogeneous solution, pass nitrogen to raise the pressure to 1MPa, open the valve, let the mixture in the kettle pass through a 1.2mm, 3.5m long thin tube, above 100°C In a vacuum drying container, the powder was washed 5 times with heptane and dried at room temperature.

[0048] 2. Preparation of spherical Ziegler-Natta catalyst

[0049] Take MgCl 2 Add 2g of the carrier into the preparation bottle, blow in argon after vacuum, then add 100ml of TiCl at 0°C 4 , after stirring and raising the temperature to 80° C., 0.5 g of BMF was added. The temperature was raised to 130° C., and the mixture was stirred for 2 hours. Vacuum filter, add 100ml TiCl 4 , heated to 130° C., treated for 2 hours, washed 6 times with hexane, and dried in vacuum to ob...

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PUM

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Abstract

This invention relates to a preparation method of metal composite catalyst usd for olefinic polymerization. This metal composite catalyst includes : component I: a sort of Ti compound free of metal -PI bond; component II: one or more Ti at least containing one metal - PI bond, Zr, transition metal compound of V or Hf; component III: a sort of magnesium halide; component IV: : a sort of aluminium alkyl oxygen alkane or aluminium alkyl; component V: a sort of inside electron donor. This invention compound not homogeneous phase Ziegler - Natta catalyzer with metallocene catalyst component, not only be able to obtain polymer that has adjustable molecular weight at very widely extension and metabolic molecular weight distribution, furthermore may be able to may be able to adequate to production of adjustable polyolefine alloying, possess extensive application prospects.

Description

technical field [0001] The invention relates to a metal composite catalyst for olefin polymerization and a preparation method thereof, in particular to a metal composite catalyst comprising a Ziegler-Natta catalyst component and a metallocene catalyst component and a preparation method thereof. Background technique [0002] The metallocene catalyst has a single catalytic active center, and the generated polymer has a narrow molecular weight distribution and a uniform comonomer distribution, and can generate syndiotactic copolymers, which can make most of the comonomers participate in the polymerization, thereby realizing the molecular design of the polymer; Different metallocene catalysts exhibit different characteristics and advantages in terms of the above characteristics, respectively. However, metallocene catalysts are homogeneous catalysts, and the resulting polymers have poor morphology and are easy to stick to the kettle, which is not conducive to material transportat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/00C08F4/645
Inventor 牛慧董金勇
Owner INST OF CHEM CHINESE ACAD OF SCI
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