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Catalyst component for olefin polymerization and preparation method thereof

A technology for olefin polymerization and catalysts, which is applied in the field of catalyst components and catalysts. It can solve problems such as high material prices, difficult control, and complicated forming steps, and achieve excellent comprehensive performance, good hydrogen adjustment sensitivity, and high catalytic activity. Effect

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

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 precipitate catalyst particles, which can improve the particle morphology of the resulting catalyst, such as EP0258089A The perfluoropolyether used in the Chinese patent CN1537118A uses perfluorooctane. The forming steps of these methods are complicated and difficult to control, and the shape of the obtained catalyst particles is not easy to control, and the materials used are expensive and difficult to obtain.

Method used

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  • Catalyst component for olefin polymerization and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 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% wherein) hexane solution (10g / L) 3ml, cool to-50 ℃, add the phosphorus trichloride of 0.6 milliliter and 0.35ml titanium tetrachloride successively, After adding the materials, 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 ml, after the washing was completed, it was dried to obtain a brown solid fluid powder with an average particle size of 17.6 microns.

[0040] Elemental analysis (ICP): Ti: 9.86% by weight, Mg: 12.69% by weight.

[0041] Ethyle...

Embodiment 2

[0044] Except that the hexane solution (10g / L) 3ml of styrene-butadiene triblock copolymer is changed into 6ml, and the phosphorus trichloride of 0.6 milliliters is changed into the phosphorus oxychloride of 0.6 milliliter simultaneously, other conditions are the same as embodiment 1. Its average particle size is 9.83 microns.

[0045] Elemental analysis (ICP): Ti: 10.67% by weight, Mg: 13.58% by weight.

[0046] 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

[0048] Change the 1.0ml of isooctyl alcohol in the catalyst preparation process to 3.0ml of isooctyl alcohol, quickly heat up to 50°C within 10 minutes, 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. Its average particle size was 19.7 microns.

[0049] Elemental analysis (ICP): Ti: 10.36% by weight, Mg: 14.62% by weight.

[0050] 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 component for olefin polymerization and a preparation method and application thereof. The catalyst contains the reaction product of at least one type of organomagnesium compound, at least one type of liquid titaniferous compound, at least one type of hydroxyl compound, at least one type of chloric organophosphorus compound and at least one type of formation-assisting precipitation agent, and the formation-assisting precipitation agent is polystyrene block polybutadiene polymer. The prepared catalyst has good hydrogen-regulating performance and good particle morphology and distribution, which is more favorable for the application of the catalyst in polymerization process apparatuses of gaseous phase, slurry and the like.

Description

technical field [0001] The present invention relates to a catalyst component for olefin polymerization or copolymerization and its catalyst, as well as the preparation method and application of the catalyst component. technical background [0002] Since the successful development of high-efficiency polyolefin catalysts in the 1970s, the world polyolefin industry has undergone tremendous changes. Over the past 20 years, with the development of olefin polymerization process, the catalysts matching the polymerization process have also made great progress. Among them, high-efficiency catalysts still occupy an important role in the field of polyolefin catalysts due to their excellent polymerization performance and mature application technology. status. After years of exploration and research, the preparation method of Mg-Ti high-efficiency catalyst has also developed from the co-grinding method and the suspension impregnation method to the chemical reaction method. In the chemi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/00C08F4/645C08F4/654C08F4/649C08F4/648C08F10/02C08F10/06C08F10/08C08F10/14
Inventor 王世波高克京刘东兵吕新平毛炳权邢宝泉张长礼张磊王丽莎黄廷杰
Owner CHINA PETROLEUM & CHEM CORP
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