Catalyst component for vinyl polymerization and catalyst comprising the same

A technology of ethylene polymerization and catalyst, which is applied in the field of catalyst components, can solve the problem of unsatisfactory hydrogen adjustment sensitivity, etc., and achieve the effect of less subdivision content and high catalytic activity

Inactive Publication Date: 2012-02-08
CHINA PETROLEUM & CHEM CORP +1
9 Cites 8 Cited by

AI-Extracted Technical Summary

Problems solved by technology

However, the hydrogen tuning sensitivity of the ca...
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Abstract

The invention relates to a catalyst component for vinyl polymerization, a catalyst containing the component, and a preparation method of the component. The catalyst component is prepared by the following steps: (1)reacting a magnesium compound, an organic alcoholic compound, at least an organic titanium compound with at least a boron compound to obtain a reaction product A; (2) reacting the reaction product A with at least an organo-aluminum compound to obtain a reaction product B; (3) reacting the reaction product B with at least an inorganic titanium compound to obtain the final catalyst component. The catalyst disclosed herein has high catalytic activity, good hydrogen response, narrow polymer particle size distribution and the like, and is very suitable for being applied in vinyl slurry polymerization technology and composite polymerization technology that requiring a high catalytic activity catalyst.

Technology Topic

MagnesiumAluminium +12

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  • Catalyst component for vinyl polymerization and catalyst comprising the same

Examples

  • Experimental program(5)
  • Comparison scheme(2)

Example Embodiment

[0041] Example 1
[0042] (1) Preparation of catalyst components: In a reactor fully replaced by high-purity nitrogen, add 4.0g magnesium dichloride (0.042mol), 60ml toluene, 19.2g (0.084mol) tetraethoxytitanium, 6.9ml in sequence (0.1176mol) ethanol, 2.1ml (0.0126mol) triethoxyborane, heated to 70°C with stirring, and reacted at 70°C when the solid was completely dissolved to form a uniform solution. The temperature was lowered to 65°C, 21ml of 2M monochlorodiethylaluminum heptane solution was slowly added dropwise, and the reaction was maintained at 65°C for 1 hour, then the temperature was raised to 90°C and the reaction continued for 1 hour. The system was cooled to 30°C, the solid was allowed to settle, the filtrate was filtered, and the solid was washed twice with 60ml of hexane, 60ml of hexane was added to the solid and stirred, 60ml of titanium tetrachloride was slowly added dropwise and reacted at 30°C for 1 hour. Stop stirring and let it stand. The suspension is separated quickly, the supernatant is removed, washed with hexane four times, and dried with high-purity nitrogen to obtain a solid catalyst component with good fluidity and narrow particle size distribution. The catalyst composition is shown in Table 1.
[0043] (2) Ethylene polymerization
[0044] A stainless steel reactor with a volume of 2L, after being fully replaced by high-purity nitrogen, add 1L of hexane, 1.0ml of triethylaluminum with a concentration of 1M, add the solid catalyst prepared above, heat up to 70°C, and pass hydrogen to make the pressure inside the kettle When it reaches 0.50Mpa, ethylene is then introduced to make the total pressure in the kettle reach 1.0Mpa (gauge pressure), and the polymerization is carried out at 90°C for 2 hours. The polymerization results are shown in Table 1.

Example Embodiment

[0045] Example 2
[0046] (1) The synthesis of the catalyst is the same as in Example 1. Only the amount of ethanol was changed from 6.9ml to 4.9ml.
[0047] (2) Ethylene polymerization is the same as in Example 1. The catalyst composition and polymerization results are shown in Table 1.

Example Embodiment

[0048] Example 3
[0049] (1) The synthesis of the catalyst is the same as in Example 2. Only diethyl aluminum chloride is changed to isobutyl aluminum dichloride.
[0050] (2) Ethylene polymerization is the same as in Example 1. The catalyst composition and polymerization results are shown in Table 1.

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