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Catalyst component used for ethylene homopolymerization or copolymerization reaction, and catalyst thereof

A technology of ethylene polymerization and catalyst, which is applied in the field of catalyst preparation, and can solve problems such as the inability to achieve precise control and the inability to prepare polyethylene powder particles

Active Publication Date: 2016-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned catalysts are all polypropylene catalysts, and none of the above-mentioned catalysts can prepare polyethylene powder particles with relatively smooth outer surfaces.
Precise control of the physical structure of N-like polyolefin catalysts cannot be achieved through the above-mentioned ester complex electron donors

Method used

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  • Catalyst component used for ethylene homopolymerization or copolymerization reaction, and catalyst thereof
  • Catalyst component used for ethylene homopolymerization or copolymerization reaction, and catalyst thereof
  • Catalyst component used for ethylene homopolymerization or copolymerization reaction, and catalyst thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] (1) Preparation of catalyst components

[0059] Add 4.0 g of magnesium chloride, 100 ml of toluene, 8.0 ml of epichlorohydrin, and 15 ml of tri-n-butyl phosphate into the reaction kettle, and react for 2 hours at a stirring speed of 450 rpm and a temperature of 60°C, and add 2 g of phthalate Formic anhydride, 2ml butyl acetate and 100mg polyepichlorohydrin (Mn=16000), continue to keep the temperature constant for 1 hour, cool down to -40°C, add 70ml of titanium tetrachloride dropwise, gradually heat up to 95°C, hold the temperature for 1 hour, filter Remove the mother liquor, wash with inert diluent toluene and organic solvent hexane several times, and then dry to obtain a solid containing magnesium / titanium.

[0060] (2) Polymerization reaction:

[0061] A stainless steel reaction kettle with a capacity of 2L, after being fully replaced by high-purity nitrogen, was added with 1L of hexane and 1.0ml of a 1M triethylaluminum / hexane solution, and then added the solid cat...

Embodiment 2

[0064] (1) Preparation of catalyst components

[0065] Add 4.0 grams of magnesium chloride, 120 ml of toluene, 9.0 ml of epichlorohydrin, and 19 ml of tri-n-butyl phosphate into the reaction kettle, and react for 2 hours at a stirring speed of 450 rpm and a temperature of 60°C, and add 3 grams of phthalate Formic anhydride, 1ml butyl acetate and 150mg polymethyl methacrylate (Mn=20000), continue to keep the temperature constant for 1 hour, cool down to -40°C, add 30ml of titanium tetrachloride dropwise, gradually raise the temperature to 95°C, keep the temperature for 1 hour, The mother liquor was filtered off, washed several times with inert diluent toluene and organic solvent hexane, and then dried to obtain a solid containing magnesium / titanium.

[0066] (2) Polymerization reaction: with embodiment 1, polymerization result is shown in Table 1.

Embodiment 3

[0068] (1) Preparation of catalyst components

[0069] Add 4.0 grams of magnesium chloride, 160ml of toluene, 10ml of epichlorohydrin, and 18ml of triisobutyl phosphate into the reaction kettle, and react for 2 hours at a stirring speed of 350rpm and a temperature of 60°C, and add 3 grams of phthalo Acid anhydride, 1ml of n-octyl acetate and 210mg of polyethylene glycol (Mn=6000), continue to keep the temperature constant for 1 hour, cool down to -45°C, add 30ml of titanium tetrachloride dropwise, gradually raise the temperature to 95°C, hold the temperature for 1 hour, filter off The mother liquor is washed several times with the inert diluent toluene and the organic solvent hexane, and then dried to obtain a solid containing magnesium / titanium.

[0070] (2) Polymerization reaction: with embodiment 1, polymerization result is shown in Table 1.

[0071] (3) Electron microscope photo: See Figure 3 for the electron microscope photo of the powder.

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Abstract

The invention provides a catalyst component used for an ethylene polymerization reaction. The catalyst comprises the following reactants: 1, a magnesium compound; 2, an organophosphorus compound; 3, an organic epoxy compound; 4, a precipitation assistant; 5, a polar polymer; 6, an acetate compound; and 7, a titanium compound. Polyethylene powder particles obtained through polymerizing ethylene in the presence of the catalyst under ethylene slurry polymerization conditions (the hydrogen pressure is 2.8*10<5>Pa, the ethylene pressure is 7.5*10<5>Pa, the polymerization temperature is 85DEG C, and the polymerization time is 2h) have the following special physical structures: 1, every polyethylene powder particle is composed of several to dozens of small polyethylene spheres with the particle size being greater than 50[mu]m, and fusion among the small polyethylene spheres is good; and 2, the surface of every small polyethylene sphere is relatively smooth, and 1-10[mu]m polyethylene primary particles cannot be observed.

Description

technical field [0001] The invention relates to a Ziegler-Natta type catalyst component for ethylene homopolymerization or copolymerization, and a preparation method of a catalyst containing the Ziegler-Natta type catalyst component. Background technique [0002] For Ziegler-Natta type olefin polymerization catalysts, in industrial olefin polymerization production equipment, some catalyst particles will be uncontrollably broken, and smaller fragments may develop into polyethylene fine powder. Fine powder will adhere to the inner wall of the reactor in industrial production, causing uneven heat transfer and increasing heat consumption; at the same time, it will deposit in the pipeline, which will eventually cause the device to shut down; The materials may have different molecular weight, molecular weight distribution and branching degree, so it may be difficult to mix uniformly during the granulation process, causing local defects, so the generation of fine powder should be m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/02C08F4/649C08F4/645
Inventor 黄庭周俊领李秉毅寇鹏马永华
Owner CHINA PETROLEUM & CHEM CORP
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