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Catalyst component for olefin polymerization and preparation method and catalyst thereof

A technology for olefin polymerization and catalyst, which is applied to the catalyst component of olefin polymerization and the preparation method thereof and the field of catalyst, can solve the problems of complex forming steps, affecting the shape of catalyst particles, difficult to control the forming steps, etc., and achieves good hydrogen regulation performance, good Effect of particle morphology and distribution

Active Publication Date: 2018-04-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patents CN158136, CN1795213 and U.S. patents US4508843, US4921920 and US5124296 disclose the use of organometallic magnesium compounds, chlorinating agents and transition metal titanium compounds to prepare a variety of different types of catalysts. In the process of preparing catalysts in these patents, all There is a problem of difficulty in controlling the shaping step, which in turn affects the morphology of the catalyst particles
Recent studies have found that in the dispersion system of the catalyst precursor containing magnesium / titanium compounds, adding some substances like emulsifiers to form an emulsion, and then reacting to precipitate catalyst particles, can improve the particle shape of the resulting catalyst. In Europe The patent EP0258089 discloses the use of perfluoropolyether, and the Chinese patent CN1537118 discloses the use of perfluorooctane, but the forming steps of the methods disclosed in these patents are complicated and difficult to control, and the shape of the obtained catalyst particles is also difficult to control, and The substances used are expensive and costly

Method used

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  • Catalyst component for olefin polymerization and preparation method and catalyst thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] 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 polymethacrylic acid Methyl ester diblock copolymer (polybutadiene content 33%) hexane solution (10g / L) 2ml, cool down to -50 ℃, add 1.6ml hexane solution (2M) of ethyl aluminum dichloride 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 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 23.6 microns.

[0048] Elementa...

Embodiment 2

[0051] The hexane solution (10g / L) 2ml that adds polybutadiene polymethyl methacrylate diblock copolymer in the catalyst preparation process is changed into adding polybutadiene polymethyl methacrylate diblock copolymer Hexane solution (10g / L) 4ml, other conditions are with embodiment 1, and the average particle diameter of catalyst component is 16.2 microns.

[0052] Elemental analysis (ICP): Ti: 13.65% by weight, Mg: 15.77% by weight.

[0053] 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

[0055] In the catalyst preparation process, "naturally and slowly raise the temperature, after rising to room temperature, heat and maintain 50°C for 2 hours" is changed to 10 minutes to raise the temperature to 50°C, heat and maintain 50°C for 2 hours, other conditions are the same as in Example 1, catalyst components The average particle size is 15.8 microns.

[0056] Elemental analysis (ICP): Ti: 9.56% by weight, Mg: 13.81% by weight.

[0057] 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 a catalyst thereof. The catalyst component contains a reaction product of at least one organic magnesium compound, at least one titanium-containing compound, at least one hydroxyl-containing compound, at least one fluorine-containing organic aluminum compound and at least one additive, wherein the additive is a polybutadiene block polymethyl methacrylate block polymer. The catalyst provided by the invention not only has a good hydrogen regulating property, but also has good particle shape and distribution, so that the catalyst is more favorably used in polymerization process devices such as gas phase and slurry.

Description

technical field [0001] The invention belongs to the field of catalysts for olefin polymerization, and relates to a catalyst component for olefin polymerization, a preparation method and a catalyst. Background technique [0002] Over the past 20 years, with the development of olefin polymerization technology, the catalysts supporting olefin polymerization have also made great progress. Among them, high-efficiency catalysts occupy an important position in the field of olefin polymerization due to their excellent catalytic performance and mature application technology. . After years of exploration and research, the preparation method of Mg-Ti high-efficiency catalysts has developed from co-grinding method and suspension impregnation method to chemical reaction method. Chinese patents CN158136, CN1795213 and U.S. patents US4508843, US4921920 and US5124296 disclose the use of organometallic magnesium compounds, chlorinating agents and transition metal titanium compounds to prepa...

Claims

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Application Information

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IPC IPC(8): C08F10/00C08F110/02C08F4/649C08F4/654C08F4/651
CPCC08F10/00C08F110/02C08F4/6494C08F4/6546C08F4/651C08F2500/12C08F2500/18
Inventor 王世波周俊领刘东兵张磊吕新平黄廷杰周歆张长礼邢宝泉
Owner CHINA PETROLEUM & CHEM CORP
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