Carrier for ethylene homopolymerization or copolymerization, and catalyst thereof

A technology for ethylene polymerization and catalyst, which is applied to the catalyst containing the solid catalyst component and the field of preparation thereof, and can solve the problems of easily broken catalyst, unfavorable stable operation of fluidized bed, etc.

Active Publication Date: 2016-06-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Whether the catalyst is easy to break during polymerization is mainly limited by the mechanical strength of the carrier. If the mechanical strength of the support is low, the catalyst obtained by its treatment is also easy to break, and a certain amount of polyethylene fine powder will be produced in the polymerization, which is very important for Stable operation of the fluidized bed is unfavorable

Method used

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  • Carrier for ethylene homopolymerization or copolymerization, and catalyst thereof
  • Carrier for ethylene homopolymerization or copolymerization, and catalyst thereof
  • Carrier for ethylene homopolymerization or copolymerization, and catalyst thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Preparation of polymer doped supports

[0053] Add 4.0 g of magnesium chloride, 90 ml of toluene, 20 ml of tri-n-butyl phosphate, 8.0 ml of glycidyl methacrylate, and 1 ml of ethanol into the reaction kettle, and keep the temperature constant for 2 hours at a stirring speed of 450 rpm and a temperature of 40°C. Add 3ml of methyl methacrylate to the system, slowly raise the temperature to 90°C, and the carrier particles will gradually precipitate out. Keep the temperature constant for 1 hour, filter off the mother liquor, and wash several times with an inert diluent. Transfer it to a chromatographic funnel through hexane, and dry it with high-purity nitrogen to obtain a polymer-doped carrier with a narrow particle size distribution.

Embodiment 2

[0055] Preparation of polymer doped supports

[0056] Add 4.0 grams of magnesium chloride, 80 ml of toluene, 18 ml of triethyl phosphate, 6.0 ml of glycidyl acrylate, and 2 ml of ethanol into the reaction kettle, and keep the temperature constant for 2 hours at a stirring speed of 450 rpm and a temperature of 40°C. Add 3ml of acrylonitrile to the system, slowly raise the temperature to 90°C, and the carrier particles will gradually precipitate out. Keep the temperature constant for 1 hour, filter off the mother liquor, and wash several times with an inert diluent. Transfer it to a chromatographic funnel through hexane, and dry it with high-purity nitrogen to obtain a polymer-doped carrier with a narrow particle size distribution.

Embodiment 3

[0058] Preparation of polymer doped supports

[0059] Add 3.0 g of magnesium chloride, 80 ml of toluene, 18 ml of tripropyl phosphate, 10.0 ml of glycidyl acrylate, and 2 ml of ethanol into the reaction kettle, and keep the temperature constant for 2 hours at a stirring speed of 450 rpm and a temperature of 40°C. Add 6ml of hydroxyethyl methacrylate to the system, slowly raise the temperature to 90°C, and the carrier particles will gradually precipitate out. Keep the temperature constant for 1 hour, filter off the mother liquor, and wash several times with an inert diluent. Transfer it to a chromatographic funnel through hexane, and dry it with high-purity nitrogen to obtain a polymer-doped carrier with a narrow particle size distribution.

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Abstract

The present invention relates to a polymer doped carrier for an ethylene polymerization catalyst, an ethylene polymerization catalyst component prepared from the polymer doped carrier, a preparation method of the ethylene polymerization catalyst component, and a catalyst of the polymer doped carrier. According to the present invention, magnesium chloride / organic phosphorus compound / epoxy compound having a carbon-carbon double bond / alcohol compound can form a clear and transparent solution in an inert hydrocarbon solvent, and during the heating process of the solution, the epoxy compound having the carbon-carbon double bond in the system or the reaction product thereof and a subsequently-added free radical polymerization monomer are subjected to a copolymerization reaction so as to precipitate the polymer doped carrier; the polyethylene catalyst prepared from the carrier has characteristics of narrow particle size distribution, high hydrogen response, breaking resistance during the polymerization process, and less fine powder; and the obtained polyethylene powder material has the broad molecular weight distribution.

Description

technical field [0001] The invention relates to a polymer-doped carrier for ethylene polymerization or copolymerization, a solid catalyst component, a catalyst containing the solid catalyst component and a preparation method thereof. Background technique [0002] A kind of common preparation method of Ziegler-Natta type polyolefin catalyst is: first prepare the magnesium compound (or the solid complex formed by magnesium compound and electron donor) carrier with certain particle shape and particle size distribution, as patent CN102020534A The above-mentioned alkoxymagnesium carrier, or the magnesium chloride / ethanol carrier described in the patent CN1091748A. Then, the carrier is transformed into a skeleton structure of magnesium chloride by dealcoholization, chlorination and other methods, and finally the preparation process of the polyolefin catalyst is completed by supporting titanium chloride. [0003] The most common magnesium compound (or magnesium compound / electron d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F4/649C08F4/02C08F220/32C08F220/14C08F220/44C08F220/28C08F220/18C08F212/08C08F212/14C08F10/02
Inventor 李秉毅赵梅君周俊领黄庭马永华寇鹏黄廷杰
Owner CHINA PETROLEUM & CHEM CORP
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