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Spherical carrier, olefin polymerization catalyst, preparation methods and application of spherical carrier and olefin polymerization catalyst, and olefin polymerization method

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

Inactive Publication Date: 2017-12-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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, olefin polymerization catalyst, preparation methods and application of spherical carrier and olefin polymerization catalyst, and olefin polymerization method
  • Spherical carrier, olefin polymerization catalyst, preparation methods and application of spherical carrier and olefin polymerization catalyst, and olefin polymerization method
  • Spherical carrier, olefin polymerization catalyst, preparation methods and application of spherical carrier and olefin polymerization catalyst, and olefin polymerization method

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preparation example Construction

[0050] In a second aspect, the present invention provides a method for preparing a spherical carrier, which is characterized in that the method comprises the following steps:

[0051] (1) The general formula is MgR m x 2-m The magnesium compound, the inorganic oxide and / or the precursor of the inorganic oxide, the diether compound, the glycol ester compound and the electron donor solvent are mixed to make a slurry;

[0052] (2) In an inert atmosphere, the slurry obtained in step (1) is spray-dried to obtain a spherical carrier;

[0053] 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.

[0054] 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.

[00...

Embodiment 1

[0109] 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.

[0110] 1. Vector preparation

[0111] Add 9.5 g (0.1 mol) of magnesium chloride and 243 mL (2.97 mol) of tetrahydrofuran 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, and then the temperature was raised to 70 °C, and 0.8 mL (0.003 mol) of 2-isoamyl-2-isopropyl-1,3-dimethoxypropane and 1.2 mL of (0.004 mol) 2,4-pentanediol dibenzoate. Maintained at 70°C for 2h, then lowered to 40°C and added 14.5g 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 106°C. The spherical carrier Z1 was prepared, and it was found that Z1 was basically spherical by optical ...

Embodiment 2

[0119] 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.

[0120] 1. Vector preparation

[0121] Add 9.5 g (0.1 mol) of magnesium chloride and 284 mL (3.47 mol) of tetrahydrofuran 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 and 2 mL ( 0.0067mol) 2,4-pentanediol dibenzoate. Maintained at 70°C for 2h, then lowered to 40°C and added 19.4g of silica gel, maintained at 40°C for 2h to obtain a slurry. The slurry is spray-dried, and the spray-drying conditions are as follows: the inlet temperature is 200°C, and the outlet temperature is 105°C. The spherical carrier Z2 was prepared, and observed by an optical microscope, it was found that Z2 was basically spheric...

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Abstract

The invention discloses a spherical carrier, an olefin polymerization catalyst, preparation methods and application of the spherical carrier and the olefin polymerization catalyst, and an olefin polymerization method, belonging to the field of olefin polymerization. Specifically, the invention relates to the spherical carrier, the preparation method for the spherical carrier, the spherical carrier prepared by using the preparation method, the olefin polymerization catalyst, the preparation method for the olefin polymerization catalyst, the olefin polymerization catalyst prepared by using the preparation method and the application thereof, and the olefin polymerization method. The catalyst prepared from the spherical carrier provided by the invention is not prone to fragmentation, presents high activity and steric control capability 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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IPC IPC(8): C08F10/00C08F110/06C08F4/02C08F4/649C08F4/646
CPCC08F10/00C08F110/06C08F4/025C08F4/6494C08F4/6465C08F2500/15C08F2500/18
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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