Carrier for ethylene polymerization catalyst and catalyst of carrier

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 problems such as unfavorable stable operation of a fluidized bed

Active Publication Date: 2016-04-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Widely distributed powder usually also includes a certain amount of coarse powder and fine p

Method used

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  • Carrier for ethylene polymerization catalyst and catalyst of carrier
  • Carrier for ethylene polymerization catalyst and catalyst of carrier
  • Carrier for ethylene polymerization catalyst and catalyst of carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Preparation of polymer doped supports

[0060] Add 4.0g of magnesium chloride, 90ml of toluene, 15g of methyl 3,4,5-tripropoxybenzoate, 8.0ml of glycidyl methacrylate, and 3ml of ethanol into the reaction kettle, and stir at 450rpm at a temperature of 40°C. Conditions, constant temperature for 2 hours. Add 0.08 g of azobisisobutyronitrile to the system, slowly raise the temperature to 90°C, and the carrier particles are gradually precipitated. 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

[0062] Preparation of polymer doped supports

[0063] Add 4.0g of magnesium chloride, 100ml of toluene, 25g of ethyl 3,4,5-tributoxybenzoate, 5.0ml of glycidyl acrylate, and 6ml of ethanol into the reaction kettle, and stir at 400rpm at a temperature of 30°C , constant temperature for 2 hours. Add 0.05 g of benzoyl peroxide to the system, slowly raise the temperature to 90 degrees, and the carrier particles are gradually precipitated. 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

[0065] (1) Preparation of catalyst components

[0066] In the reactor fully replaced by high-purity nitrogen, add 4.0g of polymer-doped carrier (prepared by Example 1), 100ml of hexane in sequence, stir and cool down to -10°C, and dropwise add 40ml of triethylaluminum A hexane solution (triethylaluminum: 1.2 M) and 0.5 ml of ethyl benzoate were then warmed up to 50° C., and the reaction was maintained for 2 hours. Stirring was stopped and the mixture was left standing, the suspension was quickly separated into layers, the supernatant was sucked off, and the precipitate was washed twice with hexane at room temperature. Add 100ml of hexane, cool the system to 0°C, slowly add 6ml of titanium tetrachloride dropwise, then raise the temperature to 60°C, and react for 2 hours. Stop stirring, let it stand, the suspension will be layered quickly, and the supernatant will be pumped out. After the precipitate is washed twice with hexane, it will be transferred to a chromatography funnel...

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Abstract

The invention provides a carrier for an ethylene polymerization catalyst and a catalyst of the carrier. The carrier comprises reactants of the following components: magnesium chloride/gallic acid derivatives/epoxy compounds with carbon-carbon double bonds/alcohol compounds/radical initiators. A mixed solution of the components is initiated by the radical initiators in the process of warming, and the carbon-carbon double bonds in a system can generate a polyreaction, so that the carrier with narrow particle size distribution and doped with polymers can be separated out. The polyethylene catalyst prepared through the carrier not only has the characteristic of narrow particle size distribution but also is high in hydrogen adjustment sensibility; the particle size distribution of obtained polymeric powder materials is particularly intensive, and less fine powder is generated.

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] Since the advent of Ziegler-Natta polyolefin catalysts, after nearly 60 years of development, resins such as polyethylene and polypropylene produced through it have become the most important resin products in the world. In recent years, 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, Such as the alkoxymagnesium carrier described in patent CN102020534A, or the magnesium chloride / ethanol carrier described in patent CN1091748A, etc. Then, the carrier is transformed into a skeleton structure of magnesium chloride...

Claims

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Application Information

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IPC IPC(8): C08F10/02C08F4/02C08F4/649
Inventor 黄庭孙竹芳周俊领郭子芳谢伦嘉李秉毅寇鹏马永华
Owner CHINA PETROLEUM & CHEM CORP
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