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Catalyst component for ethylene polymerization, catalyst and preparation method thereof

An ethylene polymerization and catalyst technology, which is applied in the field of catalyst components for ethylene polymerization, can solve the problems of inability to prepare N-type polyolefin catalysts and the like

Active Publication Date: 2018-03-02
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the inventors have found through research that spherical / ellipsoidal N-type polyolefin catalysts cannot be prepared by these composite electron donors.

Method used

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  • Catalyst component for ethylene polymerization, catalyst and preparation method thereof
  • Catalyst component for ethylene polymerization, catalyst and preparation method thereof
  • Catalyst component for ethylene polymerization, catalyst and preparation method 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, 9.0 ml of epichlorohydrin, and 15.0 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 g of phthalate Formic anhydride, 2ml butyl acetate and 1ml cyclobutanone, keep the temperature constant for 1 hour, cool down to -40°C, add 70ml of titanium tetrachloride dropwise, gradually raise the temperature to 95°C, keep the temperature for 1 hour, filter off the mother liquor, pass through an inert diluent Washing with toluene and organic solvent hexane several times and then drying to obtain a solid containing magnesium / titanium.

[0060] (2) Polymerization reaction

[0061] A stainless steel reaction kettle with a volume of 2L, after being fully replaced by high-purity nitrogen, add 1L of hexane and 1.0ml of triethylaluminum with a concentration of 1M, and then add the solid catalyst c...

Embodiment 2

[0064] (1) Preparation of catalyst components

[0065] Add 4.0 grams of magnesium chloride, 105ml of toluene, 7.0ml of epichlorohydrin, and 11ml of triisobutyl phosphate into the reaction kettle, and react for 2 hours at a stirring speed of 450rpm and a temperature of 60°C, and add 2g of phthalo Acid anhydride, 1ml butyl acetate and 1ml cyclopentanone, continue to keep the temperature for 1 hour, cool down to -40°C, add 75ml of titanium tetrachloride dropwise, gradually raise the temperature to 95°C, keep the temperature for 1 hour, filter off the mother liquor, pass through the inert diluent toluene and the organic solvent hexane for several times and then dried to obtain a magnesium / titanium-containing solid.

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

[0067] (3) Electron microscope photo: See Figure 4 for the electron micrograph of the catalyst.

Embodiment 3

[0069] (1) Preparation of catalyst components

[0070] Add 4.0 grams of magnesium chloride, 100ml of toluene, 9ml of epichlorohydrin, and 10ml 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 then add 2g of phthalic anhydride , 1ml of n-octyl acetate and 1ml of cyclohexanone, continue to keep the temperature 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, filter the mother liquor, and pass through the inert diluent toluene and the organic solvent hexane for several times and then dried to obtain a magnesium / titanium-containing solid.

[0071] (2) Polymerization reaction: with embodiment 1, polymerization result is shown in Table 1.

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Abstract

The invention provides a catalyst component for polymerization of ethylene. The catalyst component comprises reactants of the following components: (1) magnesium compounds; (2) organic acid anhydride; (3) acetic ester compounds; (4) cyclic ketone compounds; and (5) titaniferous compounds. When organic acid anhydride / acetic ester / cyclic ketone compounds are introduced into a system to be used as compounding electron donors, spherical / ellipsoidal magniferous / titaniferous solid particles can be prepared. Through slurry polymerization of ethylene on a catalyst disclosed by the invention, spherical / ellipsoidal powder particles can be obtained, and besides, the powder particles have very high powder bulk density.

Description

technical field [0001] The present invention relates to a catalyst for olefin polymerization, in particular to a catalyst component for ethylene polymerization, a catalyst and a preparation method of the catalyst. Background technique [0002] Since the early 1950s, Ziegler-Natta successively obtained polyethylene and polypropylene through low-pressure polymerization of titanium-based catalysts. A breakthrough has been made in aspects such as copolymerization ability. On this basis, researchers further realized that the particle morphology of Ziegler-Natta olefin polymerization catalysts is also an aspect that needs to be precisely controlled, so it has become a research hotspot in recent years. [0003] Ziegler-Natta type olefin polymerization catalyst particles have the special ability to copy their morphology to the polyolefin powder particles they produce. For example, spherical catalyst particles usually produce spherical powder particles, such as high-porosity cataly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/02C08F4/649C08F4/654C08F4/651
Inventor 黄庭周俊领李秉毅寇鹏马永华
Owner CHINA PETROLEUM & CHEM CORP
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