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Carrier model dual metal composite catalyst and method for preparing same

A composite catalyst and bimetal technology, which is applied in the field of carrier-type bimetal composite catalyst and its preparation, can solve the problems of not being chemically combined and unable to be used for preparing alloys in polypropylene kettles, etc.

Inactive Publication Date: 2009-01-07
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Efficient MgCl 2 Although carrier Ziegler-Natta catalyst and metallocene catalyst both combine the research that prepares composite catalyst to carry out, as: CN1113900C, CN1413222A, the technical scheme disclosed by CN1301601A, yet it mostly is metallocene compound and heterogeneous Ziegler-Natta Catalyst mixing, the mixed product obtained by evaporating the solvent, not a real chemical combination, cannot be used to prepare polypropylene kettle alloys

Method used

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Effect test

preparation example Construction

[0064] Preparation of the first part metal composite catalyst

[0065] In the present invention, Me=methyl, Ph=phenyl, Cp=cyclopentadienyl, Ind=indenyl, H 4 Ind=4,5,6,7-tetrahydroindene, Flu=fluorenyl, Naph=naphthyl, meso=meso

Embodiment 1

[0066] Embodiment 1, the preparation of metal composite catalyst

[0067] 1. Spherical MgCl 2 Preparation of vector

[0068] 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.

[0069] 2. Preparation of spherical Ziegler-Natta catalyst

[0070] 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

[0073] Embodiment 2, the preparation of metal composite catalyst

[0074] 1. Spherical MgCl 2 Preparation of vector

[0075] 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.

[0076] 2. Preparation of spherical Ziegler-Natta catalyst

[0077] 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 9,9-bis(methoxymethyl)fluorene (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 ...

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Abstract

The invention discloses a carrier-type composite bimetallic catalyst and the preparation method thereof. The composite catalyst contains a Ti-containing compound without metal-phi bond, a meso compound containing a transition metal M selected from Ti, Zi, V or Hf with metal-phi bond, magnesium halide, alkyl aluminoxane or alkylaluminium and an internal electron donor. By combining the non-homogeneous Ziegler-Natta catalyst with a meso metallocene compound, the method can selectively control the propylene polymerization process and the copolymerization process of ethylene / alpha-olefins, thereby obtaining a polymer with an adjustable polymer constitution in a very large range. Accordingly, the method can be used for producing polyolefin alloys with adjustable performance and has wide application prospect.

Description

technical field [0001] The invention relates to a carrier-type bimetal composite catalyst and a preparation method thereof. Background technique [0002] Heterophase copolymerization polypropylene tank alloy is to use two-stage or multi-stage polymerization to continuously carry out propylene homopolymerization and ethylene / alpha-olefin (usually propylene) copolymerization (mainly random copolymerization) to form a structure directly in the polymerization reactor. Modified polypropylene resin with controllable performance and wide application range is an important field of research on high performance and diversified performance of polyolefins, and it is also a hot spot in the research of olefin polymerization catalysts and polymerization reactions. In recent years, developed countries have been far ahead in the theory and practice of the design and preparation of heterogeneous copolymer polypropylene kettle alloys. Their large petrochemical companies, including Basell and D...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F4/6592C08F10/06
Inventor 董金勇牛慧逯丽
Owner INST OF CHEM CHINESE ACAD OF SCI
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