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Spherical carrier and olefin polymerization catalyst, preparation method and application thereof, and olefin polymerization method

A spherical carrier, olefin polymerization technology, applied in the field of olefin polymerization, can solve the problems of poor propylene polymerization performance and easily broken catalyst

Active Publication Date: 2021-02-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the catalyst prepared by this kind of support is easily broken, and its propylene polymerization performance is relatively poor. For example, with di-n-butyl phthalate as an internal electron donor, when the catalyst is used for propylene polymerization, the highest activity in 2 hours is 38kg polypropylene / g solid catalyst component, the highest isotactic index of polypropylene is 97.3%, and the highest bulk density of polypropylene is 0.43g / mL

Method used

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  • Spherical carrier and olefin polymerization catalyst, preparation method and application thereof, and olefin polymerization method
  • Spherical carrier and olefin polymerization catalyst, preparation method and application thereof, and olefin polymerization method
  • Spherical carrier and olefin polymerization catalyst, preparation method and application thereof, and olefin polymerization method

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preparation example Construction

[0045] In a second aspect, the present invention provides a method for preparing a spherical carrier, wherein the method includes the following steps:

[0046] (1) The general formula is MgR m x 2-m A magnesium compound, an inorganic oxide and / or an inorganic oxide precursor, a diether compound and an electron donor solvent are mixed to prepare a slurry;

[0047] (2) In an inert atmosphere, the slurry obtained in step (1) is spray-dried to obtain a spherical carrier;

[0048] Wherein, X is halogen, R is selected from C 1 -C 14 Alkyl, C 1 -C 14 Alkoxyl, C 6 -C 14 Aryl or C 6 -C 14 A group consisting of aryloxy groups, m is an integer of 0-2.

[0049] In the present invention, in step (1), the inorganic oxide may be silicon oxide and / or aluminum oxide, preferably silicon oxide, more preferably silicon dioxide. The inorganic oxide precursor may be silica sol and / or aluminum sol, preferably silica sol.

[0050] In the present invention, in step (1), the halogen element...

Embodiment 1

[0102] This example is used to illustrate the preparation of the spherical carrier and olefin polymerization catalyst and the method of olefin polymerization in the present invention.

[0103] 1. Vector preparation

[0104] Add 9.5 g (0.1 mol) of magnesium chloride and 58 mL (1 mol) of ethanol into a stirred 500 mL glass reactor fully replaced by nitrogen, raise the temperature to 70° C. and keep for 1 h. The temperature was lowered to 0° C., then raised to 70° C., and 0.8 mL (0.003 mol) of 2-isopentyl-2-isopropyl-1,3-dimethoxypropane was added during the temperature rise. Maintained at 70°C for 2h, then lowered to 40°C and added 3.5g of silica gel, maintained at 40°C for 2h to obtain a slurry. The slurry was spray-dried, and the spray-drying conditions were: the inlet temperature was 200°C, and the outlet temperature was 103°C. The spherical carrier Z1 was prepared, and it was found that Z1 was basically spherical by optical microscope observation, and the results were as f...

Embodiment 2

[0112] This example is used to illustrate the preparation of the spherical carrier and olefin polymerization catalyst and the method of olefin polymerization in the present invention.

[0113] 1. Vector preparation

[0114] Add 9.5 g (0.1 mol) of magnesium chloride and 46 mL (0.79 mol) of ethanol into a stirred 500 mL glass reactor fully replaced by nitrogen, raise the temperature to 70° C. and keep for 1 h. The temperature was lowered to 0° C., then raised to 70° C., and 0.5 mL (0.002 mol) of 2-isopentyl-2-isopropyl-1,3-dimethoxypropane was added during the temperature rise. Maintained at 70°C for 2h, then lowered to 40°C and added 2.8g of silica gel, maintained at 40°C for 2h to obtain a slurry. The slurry was spray-dried, and the spray-drying conditions were as follows: the inlet temperature was 200°C, and the outlet temperature was 107°C. The spherical carrier Z2 was prepared, and observed by an optical microscope, it was found that Z2 was basically spherical.

[0115] ...

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Abstract

The invention relates to the field of olefin polymerization, and discloses a spherical carrier, an olefin polymerization catalyst, a preparation method and application thereof, and an olefin polymerization method. Specifically, the present invention relates to a spherical carrier, a method for preparing a spherical carrier, a spherical carrier prepared by the method, an olefin polymerization catalyst, a method for preparing an olefin polymerization catalyst, and an olefin prepared by the method Polymerization catalyst and its application and a method of olefin polymerization. The catalyst particles prepared by the spherical carrier provided by the invention are not easily broken, and the catalyst can exhibit high activity and stereo control ability in propylene polymerization, and has high polypropylene isotactic index and bulk density.

Description

technical field [0001] The present invention relates to the field of olefin polymerization, in particular to a spherical carrier, a method for preparing a spherical carrier, a spherical carrier prepared by the method, an olefin polymerization catalyst, a method for preparing an olefin polymerization catalyst, and The prepared olefin polymerization catalyst and its application and a method for olefin polymerization. Background technique [0002] As we all know, most catalysts for propylene polymerization are prepared by loading titanium tetrachloride and internal electron donors on active anhydrous magnesium chloride or silica supports. Generally, it is necessary to prepare spherical magnesium chloride supports or spherical Magnesium chloride / silica gel composite carrier, and then the carrier is loaded with titanium tetrachloride to obtain a spherical catalyst. [0003] The preparation methods of spherical magnesium chloride carrier are mostly high-speed stirring method and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F4/02C08F10/06C08F110/06C08F4/646
CPCC08F4/022C08F10/06C08F110/06C08F4/6465C08F2500/15C08F2500/18
Inventor 刘涛夏先知刘月祥凌永泰赵瑾李威莅张天一
Owner CHINA PETROLEUM & CHEM CORP
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