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Catalyst ingredient 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, and can solve problems such as difficult to control the forming steps, difficult to obtain, and difficult to control the shape of catalyst particles.

Active Publication Date: 2013-08-14
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, so it is difficult to control the morphology of the prepared catalyst particles. In, add some emulsifier-like substances to form an emulsion, and then react and precipitate catalyst particles, which can improve the particle shape of the obtained catalyst, such as the perfluoropolyether used in Montedison’s EP0258089A, which is proposed in Chinese patent CN1537118A Until the use of perfluorooctane, the forming steps of these methods are complicated, 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 ingredient for olefin polymerization and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] 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 0.6ml of tetraethyl silicate and Polybutadiene block polyethylene oxide copolymer (polybutadiene content 75wt%) hexane solution (10g / L) 3ml, cool to-50 ℃, add the hexane solution of 1.6 milliliters of ethyl aluminum dichloride successively ( 2M) and 0.35ml of titanium tetrachloride, after maintaining the low temperature for half an hour, the temperature was naturally raised slowly, 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...

Embodiment 2

[0053] Change the 0.6ml tetraethyl silicate in the catalyst preparation process to 1.0ml tetraethyl silicate. After maintaining the low temperature for half an hour, the temperature will be raised slowly naturally. ℃, other conditions are the same as embodiment 1, and its average particle diameter is 27.6 microns.

[0054] Elemental analysis (ICP): Ti: 10.84% ​​by weight, Mg: 12.12% by weight.

[0055] 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

[0057] In the catalyst preparation process, 1.0ml of isooctyl alcohol was changed to 0.5ml of isooctyl alcohol, and 0.7ml of tetraethyl silicate was changed to 1.0ml of tetraethyl silicate. Other conditions were the same as in Example 1, and the average particle size was 23.8 microns.

[0058] Elemental analysis (ICP): Ti: 9.72% by weight, Mg: 10.57% by weight.

[0059] 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, a preparation method and purpose thereof. The catalyst includes reaction products of at least one organo-magnesium compound, at least one liquid titanium-containing compound, at least one hydroxy-containing compound, at least one chlorine-containing organo aluminium compound, at least one silane compound and at least one property-modifying additive; the property-modifying additive is polystyrene block polybutadiene polymer. The prepared catalyst has good hydrogen regulation performance as well as good particle form and distribution and higher bulk density, so as to facilitate usage of the catalyst in apparatuses for gas phase and slurry polymerization technologies.

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 Patents(China)
IPC IPC(8): C08F10/00C08F4/649C08F10/02C08F10/06C08F10/08C08F10/14
Inventor 王世波刘东兵周俊领吕新平张磊毛炳权邢宝泉黄廷杰王丽莎张长礼
Owner CHINA PETROLEUM & CHEM CORP