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Method for preparing spherical magnesium chloride carrier

A technology of spherical carrier and magnesium chloride, which is applied in the field of preparation of spherical magnesium chloride carrier, can solve problems such as excessive polymer fine powder, influence on catalyst form, carrier ball breakage, etc., and achieve particle size increase, fine powder amount reduction, and high catalyst activity. Effect

Active Publication Date: 2012-07-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to avoid violent reaction when loading titanium halide, causing the carrier ball to break, affecting the shape of the catalyst, resulting in more fine polymer powder during the polymerization process, the alcohol / magnesium molar ratio of the magnesium chloride alcohol adduct solid should be controlled at 1~ 3

Method used

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  • Method for preparing spherical magnesium chloride carrier
  • Method for preparing spherical magnesium chloride carrier
  • Method for preparing spherical magnesium chloride carrier

Examples

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example 1

[0050] Prepare magnesium chloride spherical carrier with the method of the present invention

[0051] (1) alcohol reaction

[0052] 20 grams (0.21mol) of magnesium chloride (water content 2.65% by mass), 39mL (0.67mol) of absolute ethanol, 110mL of methyl silicone oil, and 110mL of liquid paraffin were added to a 500mL reaction vessel equipped with a stirrer and a condenser tube under nitrogen protection. bottle, heated to 120°C and stirred for 3 hours. The viscosity of the methyl silicone oil at 20°C is 250 centipoise, and the viscosity of the liquid paraffin at 20°C is 30 centipoise.

[0053] (2) scattered

[0054] Move the solution obtained from the alcoholation reaction to a medium that has been preheated to 120°C and consists of 100mL methyl silicone oil and 100mL liquid paraffin. The volume ratio of the mixed medium to the adduct solution is 1.4, and it is stirred at a speed of 3000 rpm 30 minutes.

[0055] (3) Rapid cooling and solidification

[0056] The above emu...

example 2

[0060] Get 5g carrier precursor ZT-0 and place in a fluidized bed reactor, fluidized dealcoholization under nitrogen, the mass space velocity of nitrogen passing through the carrier precursor is 10 hours -1 . Fluidized dealcoholization at 40°C for 1 hour, then raised to 50°C for 2 hours to obtain dealcoholization carrier ZT-2, the molar ratio of alcohol / magnesium was 2.60, and the specific surface area was 18 m 2 / g, pore volume 0.12 ml / g, bulk density 0.68g / mL, X-diffraction pattern see image 3 .

example 3

[0062] Get 5g carrier precursor ZT-0 and place in a fluidized bed reactor, fluidized dealcoholization under nitrogen, the mass space velocity of nitrogen passing through the carrier precursor is 10 hours -1 . Fluidized dealcoholization at 40°C for 1 hour, and then heated to 50°C for 3 hours to obtain dealcoholization carrier ZT-3, the molar ratio of alcohol / magnesium was 2.52, and the specific surface area was 20 m 2 / g, pore volume 0.16 ml / g, bulk density 0.63g / mL, X-diffraction pattern see Figure 4 .

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Abstract

The invention discloses a method for preparing a spherical magnesium chloride carrier. The method comprises the following steps of: performing alcohol combination reaction on magnesium chloride and fatty alcohol (ROH), dispersing, quenching, solidifying and drying to obtain a carrier precursor, performing primary alcohol removal on the carrier precursor in inert airflow at the temperature of between 30 and 40 DEG C, heating to the temperature of between 41 and 55 EG C, performing secondary alcohol removal, and thus obtaining the spherical magnesium chloride and alcohol carrier. An olefin polymerization catalyst prepared from the carrier obtained after alcohol removal by the method has high catalytic activity, the granular size of the olefin polymerization catalyst is increased, and the fine powder quantity of the olefin polymerization catalyst is reduced.

Description

technical field [0001] The invention relates to a preparation method of a polyolefin solid catalyst carrier, in particular to a preparation method of a magnesium chloride spherical carrier. Background technique [0002] Using magnesium chloride-alcohol adduct as a spherical carrier, contacting it with titanium halide and electron donor compound can prepare high-efficiency spherical olefin polymerization solid catalyst components. , CN1552742A, CN1490340A are all described. [0003] When preparing the magnesium chloride·alcohol adduct, the alcohol / magnesium molar ratio is 2-4. However, in order to avoid violent reaction when loading titanium halide, causing the carrier ball to break, affecting the shape of the catalyst, resulting in more fine polymer powder during the polymerization process, the alcohol / magnesium molar ratio of the magnesium chloride alcohol adduct solid should be controlled at 1~ 3. Therefore, before preparing the catalyst, the magnesium chloride·alcohol ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F4/02C08F10/00
Inventor 刘伟荣峻峰谢婧新黄绪耕周旭华
Owner CHINA PETROLEUM & CHEM CORP
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