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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 the problems of 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
  • Catalyst component for olefin polymerization and preparation method thereof
  • Catalyst component for olefin polymerization and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 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, wherein polybutadiene content 70%) hexane solution (10g / L) 2ml, cool to-50 ℃, add the hexane solution (2M) of 1.6 milliliters of ethyl aluminum dichlorides (2M) and 0.35 ml of titanium tetrachloride, after maintaining the low temperature for half an hour, the temperature was naturally raised slowly, and after rising to room temperature, it was heated and maintained at 50°C for 2 hours. The catalyst suspension temperature is down to room temperature, left standstill, sedimentation, washes three times with hexane, and the consumption of each hexane is 50 milliliters, after washing is finished, is dried to obtain brown solid fluidity powder, and its average particle diameter is 15.6 microns, SEM photos are ...

Embodiment 2

[0046] The hexane solution (10g / L) 2ml that adds styrene-butadiene triblock copolymer in catalyst preparation process is changed to add 4ml, and other conditions are the same as embodiment 1, and its average particle diameter is 7.69 microns.

[0047] Elemental analysis (ICP): Ti: 10.02% by weight, Mg: 14.20% by weight.

[0048] 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

[0050] 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. The other conditions were the same as in Example 1, and the average particle size was 21.5 microns.

[0051] Elemental analysis (ICP): Ti: 12.65% by weight, Mg: 9.86% 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.

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Abstract

The invention provides a catalyst component for olefin polymerization, a preparation method and an application thereof. The catalyst compound provided by the invention contains at least an organo-magnesium compound, at least a liquid titanium-containing compound, at least a hydroxy compound, at least a chlorine-containing organo aluminium compound and at least a reaction product of an agent for shaping and assisting precipitation, wherein the agent for shaping and assisting precipitation is a polystyrene block polybutadiene polymer. The catalyst prepared in the invention has good hydrogen regulation performance, and simultaneously has good particle form and distribution and higher bulk density of the polymer, therefore making the catalyst more applicable to be used in polymerization technological devices of gas 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): C08F10/00C08F4/645C08F4/654C08F4/655C08F10/02C08F10/06C08F10/08C08F10/14
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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