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Carrier used for olefin polymerization catalyst and preparation method thereof

A technology of olefin polymerization and catalyst, which is applied in the field of carrier preparation, can solve problems such as instability in the preparation process of catalyst carrier, difficulty in forming spherical particles of small and large sizes, poor carrier molding effect, etc., and achieve improved hydrogen adjustment sensitivity and bulk density Moderate effect with good particle shape

Active Publication Date: 2017-05-03
营口风光新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem with the alcoholate carrier prepared by these methods is that the catalyst prepared with this type of alcoholate carrier is prone to breakage of polymer particles in the process of catalyzing olefin polymerization, resulting in too much fine powder
However, the composite spherical carrier is easily sticky during the preparation process, and it is difficult to form spherical particles with suitable particle diameters.
CN102040683A discloses a method for preparing a carrier by reacting a magnesium halide alcoholate with an oxirane compound, and specifically discloses a reaction in which the magnesium halide alcoholate is melt-dispersed and directly added to a compound containing an oxirane compound However, the catalyst carrier prepared by this method has the disadvantages of unstable preparation process, easy carrier adhesion, and poor carrier molding effect.

Method used

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  • Carrier used for olefin polymerization catalyst and preparation method thereof
  • Carrier used for olefin polymerization catalyst and preparation method thereof
  • Carrier used for olefin polymerization catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. In a 500ml reaction kettle, add 150ml of white oil, 30g of magnesium chloride, 50ml of absolute ethanol, 2.0g of diethoxymagnesium and 0.012g of sodium chloride, heat up to 125°C under stirring, and react at a constant temperature for 2 hours. A liquid mixture is obtained.

[0035] 2. Press the liquid mixture into 300ml of methyl silicone oil preheated to 125°C, stir at high speed (1600rpm) for dispersing and emulsifying for 30min.

[0036] 3. Introduce the emulsified product into 2L hexane solution pre-cooled to -35°C, and after rapid cooling, disperse into small droplets of MgCl 2 After the alcoholate melt is cooled and solidified, it becomes spherical particles. The liquid was removed by filtration, the solid was washed 5 times with 300 ml of hexane, and vacuum-dried at 30° C. for 1 hour to obtain a solid carrier of magnesium chloride alcoholate.

[0037] by infrared spectroscopy and 1 After HNMR nuclear magnetic measurement and analysis, it is determined that it...

Embodiment 2

[0041] 1. In a 500ml reaction kettle, add 150ml of white oil, 30g of magnesium chloride, 50ml of absolute ethanol, 4.0g of diethoxymagnesium and 0.012g of sodium chloride, heat up to 125°C under stirring, and react at a constant temperature for 2 hours. A liquid mixture is obtained.

[0042] 2. Press the liquid mixture into 300ml of methyl silicone oil preheated to 125°C, stir at high speed (1600rpm) for dispersing and emulsifying for 30min.

[0043] 3. Introduce the emulsified product into 2L hexane solution pre-cooled to -35°C, and after rapid cooling, disperse into small droplets of MgCl 2 After the alcoholate melt is cooled and solidified, it becomes spherical particles. The liquid was removed by filtration, the solid was washed 5 times with 300 ml of hexane, and vacuum-dried at 30° C. for 1 hour to obtain a solid carrier of magnesium chloride alcoholate.

[0044] by infrared spectroscopy and 1 After HNMR nuclear magnetic measurement and analysis, it is determined that ...

Embodiment 3

[0047] 1. In a 500ml reaction kettle, add 150ml of white oil, 30g of magnesium chloride, 50ml of absolute ethanol, 2.0g of diethoxymagnesium and 0.015g of manganese chloride, heat up to 125°C under stirring, and react at a constant temperature for 2 hours. A liquid mixture is obtained.

[0048] 2. Press the liquid mixture into 300ml of methyl silicone oil preheated to 125°C, stir at high speed (1600rpm) for dispersing and emulsifying for 30min.

[0049] 3. Introduce the emulsified product into 2L hexane solution pre-cooled to -35°C, and after rapid cooling, disperse into small droplets of MgCl 2 After the alcoholate melt is cooled and solidified, it becomes spherical particles. The liquid was removed by filtration, the solid was washed 5 times with 300 ml of hexane, and vacuum-dried at 30° C. for 1 hour to obtain a solid carrier of magnesium chloride alcoholate.

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Abstract

The invention relates to a carrier used for an olefin polymerization catalyst and a preparation method thereof. The carrier is (MgXY)m.[Mg(OR')Z]p.(ROH)n. The preparation method comprises the following steps: mixing magnesium halide as shown in MgXY, a compound as shown in ROH and a first inert medium; carrying out heating at 90 to 150 DEG C for 0.5 to 5 h; then emulsifying a liquid-state mixture obtained in the previous step; introducing an emulsification product to a second inert medium which has been cooled to -40 to 10 DEG C for rapid cooling and forming; carrying out solid-liquid separation so as to obtain a spherical carrier; and carrying out washing and drying so as to obtain the carrier. According to the invention, a forming agent and a grain-shape controlling agent are added during formation of an alcohol adduct of magnesium halide, so the obtained carrier has more concentrated particle size distribution; the catalyst prepared from the carrier has improved activity and hydrogen sensitivity when applied to olefin polymerization, especially to propylene polymerization; and an obtained polymerization product has moderate bulk density and is almost free of special-shaped materials.

Description

technical field [0001] The invention belongs to the field of chemical synthesis, and in particular relates to a method for preparing a carrier for olefin polymerization catalysts. Background technique [0002] As we all know, the carrier of Ziegler-Natta catalyst commonly used for olefin polymerization is magnesium chloride alcoholate, and its overall performance is superior to other carrier catalysts. At present, catalysts for olefin polymerization are basically prepared by loading titanium halide on magnesium chloride alcoholate. The preparation method of carrier magnesium chloride alcoholate can generally be adopted by spray drying, spray cooling, high-pressure extrusion, high-speed stirring, emulsification, etc. Forming and supergravity rotating bed and other methods. However, the problem with the alcoholate carrier prepared by these methods is that the catalyst prepared with this kind of alcoholate carrier is prone to breakage of polymer particles in the process of cat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/00C08F4/02C08F110/06C08F4/646
CPCC08F10/00C08F110/06C08F4/022C08F2500/15C08F2500/12C08F2500/18C08F4/6465
Inventor 王磊王振国陈雪
Owner 营口风光新材料股份有限公司
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