Components, preparation method and application of alkene polymerization catalyst

An olefin polymerization and catalyst technology, applied in the field of catalyst components and catalysts, can solve the problems of difficult control of catalyst particle shape, high material price, and difficulty in obtaining.

Active Publication Date: 2012-05-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this type of Mg-Ti catalysts, there is a fatal disadvantage that it is difficult to control the shaping step, thus it is difficult to control the morphology of the prepared catalyst particles, the recent development is in the dispersion system of catalyst precursors containing magnesium / titanium compounds , add some substances similar to emulsifiers to form an emulsion, and then react to precipitate catalyst particles, which can improve the particle morphology of the resulting catalyst, such as the perfluoropolyether used in Montedison’s EP0258089A, mentioned in Chinese patent CN1537118A Using perfluorooctane, the forming steps of these methods are complicated and difficult to control, and the shape of the obtained catalyst particles is also difficult to control, and the materials used are expensive and difficult to obtain

Method used

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  • Components, preparation method and application of alkene polymerization catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] 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 polybutadiene block polyethylene oxide Alkanes copolymer (polybutadiene content 75wt%) hexane solution (10g / L) 3ml, cool to-50 ℃, add the hexane solution (2M) of 1.6 milliliters of ethyl aluminum dichloride and 0.35ml tetrachloride successively For titanium, after maintaining the low temperature for half an hour, the temperature was raised slowly naturally, and after rising to room temperature, the reaction was maintained at 50°C 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 17.3 microns.

...

Embodiment 2

[0050] Add polybutadiene block polyethylene oxide copolymer (polybutadiene content 75wt%) hexane solution (10g / L) 3ml in the catalyst preparation process to add polybutadiene block polyethylene oxide copolymer (polybutadiene content 75wt%) hexane solution (10g / L) 6ml, other conditions are with embodiment 1, and its average particle diameter is 5.68 microns.

[0051] Elemental analysis (ICP): Ti: 10.34% by weight, Mg: 14.02% by weight.

[0052] 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

[0054] After maintaining the low-temperature reaction in the catalyst preparation process for half an hour, the temperature was raised slowly naturally, and the temperature was adjusted to room temperature after feeding, and then the temperature was raised to 50° C. within 10 minutes. Other conditions were the same as in Example 1, and the average particle size was 23.7 microns.

[0055] Elemental analysis (ICP): Ti: 12.36% by weight, Mg: 10.57% by weight.

[0056] 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 components, a preparation method and an application of an alkene polymerization catalyst. The catalyst comprises at least one organic magnesium compound, at least one titanium-containing compound, at least one hydroxy-containing compound, at least one chlorine-containing organic aluminum compound, and at least one modifying additive. According to the invention, during a catalyst preparation process, a polybutadiene block polyethylene oxide copolymer is adopted as the modifying additive, such that the obtained catalyst has good hydrogen modulation property and good particle shape and distribution. Therefore, the catalyst can be better applied in gas phase and slurry polymerization technological apparatuses.

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] In the past 20 years, with the development of olefin polymerization technology, 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 chemical reaction method, many invention patents involve the use of chemical raw materials such as organometallic magnesium compounds, chlorinating agents a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F110/02C08F110/06C08F110/08C08F110/14C08F210/02C08F210/06C08F210/08C08F210/14C08F4/645C08F4/649C08F4/654C08F4/655C08F4/658
Inventor 王世波刘东兵周俊领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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