Catalyst ingredient for olefin polymerization and preparation method thereof

An olefin polymerization and catalyst technology, applied in the field of catalyst components and catalysts, can solve the problems of complex forming steps, difficult to control, high material prices, etc., and achieve high catalytic activity, good hydrogen adjustment sensitivity, and excellent comprehensive performance. Effect

Active Publication Date: 2012-03-14
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

In this type of Mg-Ti catalyst, there is a fatal shortcoming that it is difficult to control the shaping step, and thus it is difficult to control the morphology of the prepared catalyst particles
[0003] The recent development is to add some emulsifier-like substances to the dispersion system of the catalyst precursor containing magnesium/titanium compounds to form an emulsion, and then react to precipit

Method used

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  • Catalyst ingredient for olefin polymerization and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0038] Take 30ml of hexane, 3.15ml of dibutylmagnesium hexane solution (1M) and 1.0ml of isooctyl alcohol in turn, raise the temperature to 50°C and keep stirring for half an hour to obtain a transparent solution, then add styrene butadiene triblock Copolymer (Kraton, FG1901X, polybutadiene content 70%) hexane solution (10g / L) 1ml, cool to -10 ℃, add 0.36ml silicon tetrachloride and 0.35ml titanium tetrachloride successively, add After feeding, the temperature was rapidly raised to 50° C. within 10 minutes, and the reaction was maintained for 2 hours. The temperature of the catalyst suspension was lowered to room temperature, allowed to stand, settled, washed three times with hexane, each time the amount of hexane was 50 milliliters, and after the washing was completed, it was dried to obtain a brown solid fluid powder with an average particle size of 56.2 microns.

[0039] Elemental analysis (ICP): Ti: 9.48% by weight, Mg: 20.84% ​​by weight.

[0040] Ethylene polymerization...

Embodiment 2

[0043] In the catalyst preparation process, the temperature was rapidly raised to 50° C. within 10 minutes, and changed to 70° C. within 10 minutes. The other conditions were the same as in Example 1, and the average particle size was 85.2 microns.

[0044] Elemental analysis (ICP): Ti: 5.12% by weight, Mg: 12.81% by weight.

[0045] The ethylene slurry polymerization evaluation conditions of the catalyst are the same as in Example 1, and the polymerization results are shown in Table 1.

Embodiment 3

[0047] Change the 1.0ml isooctyl alcohol in the catalyst preparation process into 0.6ml n-butanol, change the 1ml of hexane solution (10g / L) that adds styrene-butadiene triblock copolymer into 3ml, and change it into 3ml within 10 minutes. Rapidly raise the temperature to 50°C, then change the temperature to naturally and slowly rise to room temperature, and then heat to 50°C. Other conditions are the same as in Example 1, and the average particle size is 24.3 microns.

[0048] Elemental analysis (ICP): Ti: 11.66% by weight, Mg: 24.39% by weight.

[0049] The ethylene slurry polymerization evaluation conditions of the catalyst are the same as in Example 1, and the polymerization results are shown in Table 1.

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Abstract

The invention provides a catalyst ingredient for olefin polymerization, its preparation method and application. The ingredient comprises at least one organic magnesium compound, at least one liquid titaniferous compound, at least one hydroxyl compound, at least one chlorine-containing organosilicon compound, and at least one reaction product of a forming and precipitating aid, wherein, the forming and precipitating aid is a polystyrene block polybutadiene polymer. The prepared catalyst has good hydrogen regulation performance, good particle shape and distribution, which is advantageous for the use of the catalyst in gas phase, slurry and other polymerization devices.

Description

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Claims

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Application Information

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Owner CHINA PETROLEUM & CHEM CORP
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