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Carrier for olefin polymerization catalyst and its preparation method and its uses in preparing olefin polymerization catalyst

A technology of olefin polymerization and catalyst, which is applied in the carrier field of olefin polymerization catalysts, and can solve problems such as insufficient carrier alcohol content, complicated carrier process, and difficulty in preparing spherical carriers.

Active Publication Date: 2006-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the spherical MgCl prepared by the conventional spray drying method 2 Insufficient alcohol content in the carrier, and the preparation of spherical MgCl by spray cooling 2 The carrier process technology is relatively complicated, the requirements for instruments and equipment are relatively high, and it is difficult to obtain spherical carriers with small particle sizes. use in

Method used

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  • Carrier for olefin polymerization catalyst and its preparation method and its uses in preparing olefin polymerization catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0033] a) preparation of magnesium chloride solution: after passing through N 2 Add 200mL of dehydrated ethanol to the fully replaced 350mL reactor with stirring, and add 20g of anhydrous magnesium chloride while stirring at room temperature, control the adding speed of magnesium chloride, and keep the system temperature below 40°C. , the temperature of the mixed system was raised to 70°C, and kept at this temperature for 4 hours to obtain a uniform MgCl 2 ethanol solution.

[0034] b) Spray drying: This experiment was carried out by (Buchi Mini B-290 spray-drier). Use a peristaltic pump to a) the MgCl obtained in the step 2 The solution is introduced into the two-fluid nozzle through the pipe, and atomized into the drying chamber. Control feed liquid and spray gas N 2 The flow rates are 8mL / min and 1400L / h respectively, and the spray gas temperature is room temperature. Carrier gas N 2 The flow rate is controlled at 11000L / min, the inlet temperature of the instrument is...

Embodiment 2-3

[0037] Steps a and b are all the same as in Example 1, except that the amount of ethanol added in step c is changed to 2mL and 3mL, and the others are the same as in Example 1. Spherical supports with alcohol / magnesium ratios of 2.4 and 2.5, respectively, were obtained. See Tables 1 and 2 for the magnesium alkoxide content and particle size distribution analysis results of the samples.

[0038] The spherical carrier of embodiment 3 has been carried out the test of X-diffraction, and its XRD spectrum is as figure 1 Spectrum 2 is shown.

Embodiment 4

[0040] a) preparation of mother liquor for magnesium chloride spray: after passing through N 2 Add 200mL of dehydrated ethanol to a fully replaced 350mL reactor with stirring, and add 17g of anhydrous magnesium chloride while stirring at room temperature, and control the adding speed of magnesium chloride to keep the system temperature below 40°C. , the temperature of the mixed system was raised to 70°C, and kept at this temperature for 4 hours to obtain a uniform MgCl 2 ethanol solution. Add 17g of smoky silica gel into the above solution under the condition of rapid stirring, continue to maintain the original temperature and stir rapidly for more than 1.5 hours, and obtain the mother liquor for spraying for later use.

[0041] b) Preparation of MgCl by spray drying 2 / SiO 2 Carrier: use a peristaltic pump to introduce the mother liquor obtained in step a) into a two-fluid nozzle through a pipeline, and atomize it into the drying chamber. Control feed liquid and spray gas...

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Abstract

The provides a catalyst carrier for olefin polymerization reaction with preparation method and application. Wherein, using normal spray drying method to prepare spherical magnesium halide or magnesium halide-inorganic carrier; taking makeup-alcohol treatment, and obtaining the carrier. This method can generate multi-phase magnesium alkoxide with higher Mg content and catalysis activity, needs mild reaction condition, and decreases break of catalyst.

Description

technical field [0001] The invention relates to a carrier for olefin polymerization catalysts, more specifically to a carrier with a high alcohol-magnesium ratio prepared by a spray drying method, its preparation method and its application in preparing olefin polymerization catalysts. technical background [0002] In the industrial production of polyolefins, most of the Ziegler-Natta catalysts used in the polymerization reaction are mainly composed of a main catalyst and a co-catalyst. The main catalyst comprises a transition metal compound located in the fourth to eighth main groups of the periodic table, and the cocatalyst is a metal organic compound located in the first to third main groups of the periodic table. Usually, the main catalyst can be divided into two parts: an inert carrier and its supported active component. Properties such as the morphology and particle size distribution of the carrier not only have an extremely important impact on the activity of the subs...

Claims

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Application Information

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IPC IPC(8): C08F10/00C08F4/02
Inventor 赵峰王如恩陈伟姜涛郑刚刘东兵王洪涛
Owner CHINA PETROLEUM & CHEM CORP
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