Composition, preparation method and application of a kind of olefin polymerization catalyst carrier

A reaction, hydrocarbon-based technology, applied in the field of spherical alkoxy magnesium particles, can solve the problems of high cost, low bulk density, uneven large particles or fine powder, etc., to reduce production costs, good particle sphericity, compose simple effects

Active Publication Date: 2020-11-27
为信(深圳)材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In recent years, there are various methods for preparing alkoxymagnesium in published technical literature reports, mainly containing the following categories: a kind of method disclosed in Japanese Patent Laying-Open 03-74341, 04-368391 in the presence of iodine, metal Magnesium reacts with alcohol to obtain spherical or ellipsoidal diethoxymagnesium. However, this method is difficult to control a suitable reaction rate, and the resulting product will inevitably produce uneven large particles or fine powders, and the general bulk density is relatively high. Low; the other is the spray-drying process of the diethoxymagnesium alcohol solution disclosed in Patent Laying-Open No. 6-8733, which can prepare spherical particles and then carry out decarboxylation treatment. This process is cumbersome and expensive, and the obtained product It is also difficult to completely decarboxylate, and the product quality is difficult to meet the downstream use; in addition, there is another kind of reaction of metal magnesium and alcohol to obtain alkoxymagnesium, and then mechanically grind to control the particle size. The problem of this method is also the obtained product Particle size is uneven, which seriously affects the use

Method used

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  • Composition, preparation method and application of a kind of olefin polymerization catalyst carrier
  • Composition, preparation method and application of a kind of olefin polymerization catalyst carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Fully replace the reactor with high-purity nitrogen, add 0.20 g of anhydrous magnesium carboxylate, 25 ml of absolute ethanol and 0.15 g of iodine in turn under the protection of nitrogen, stir and dissolve, then heat up, add 1.0 g and 10 ml of 80-150 mesh magnesium powder Absolute ethanol, maintain the reflux reaction, add 1.0 g of 80-150 mesh magnesium powder and 10 ml of absolute ethanol again at intervals of 20 minutes, add 4.0 g of magnesium powder and 65 ml of absolute ethanol in 4 times, and maintain reflux after adding the materials React for 3 hours, then wash twice with absolute ethanol, each time the amount of absolute ethanol is 80 ml, then wash twice with hexane, each time the amount of hexane is 100 ml, after washing, dry to obtain off-white solid Flowable powder, the specific results are shown in Table 1.

Embodiment 2

[0033] The only difference between this example and Example 1 is that in Example 1, "25 milliliters of absolute ethanol" is adjusted to "40 milliliters of absolute ethanol", and "80-150 mesh magnesium powder" is adjusted to "100-200 mesh Magnesium powder".

Embodiment 3

[0035] The difference between this embodiment and Example 1 is only that "0.20 grams of anhydrous magnesium carboxylate" in Example 1 is adjusted to "0.50 grams of anhydrous magnesium carboxylate".

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Abstract

The invention discloses a component of spherical alkoxyl magnesium particles and a method for preparing the spherical alkoxyl magnesium particles. The method comprises the following steps: introducinga certain amount of anhydrous magnesium carboxylate into alcohol or mixed alcohol compounds, and enabling a contact reaction with metal magnesium powder, thereby obtaining the alkoxyl magnesium. Theobtained alkoxyl magnesium particles have perfect form and high degree of sphericity, the bulk density of the particles is high, and the uniform particle size distribution of the particles is narrow.Meanwhile, the alkoxyl magnesium particles can be used for preparing olefin polymerization catalysts.

Description

technical field [0001] The invention relates to the field of preparation of alkoxymagnesium, in particular to a component of spherical alkoxymagnesium particles and a method for preparing spherical alkoxymagnesium particles using the component. Background technique [0002] As we all know, with the development of the economy, people's demand for polyolefin materials is getting higher and higher. High-efficiency polyolefin catalysts for the production of polyolefin materials have gained great popularity in the field of polyolefin catalysts due to their well-controlled particle morphology and microstructure. Wide range of applications. The composition and microstructure of the carrier play a key role, and the carriers obtained by different methods correspond to the catalysts with different structures and properties. [0003] In many patent documents, it is disclosed that alkoxymagnesium is used as the carrier of high-performance catalysts, and the catalysts prepared by alkoxy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/00C08F4/02C08F110/06
CPCC08F4/02C08F10/00C08F110/06
Inventor 李凌云
Owner 为信(深圳)材料科技有限公司
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