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Diatomite-loaded metallocene catalyst as well as preparation method and application thereof

A technology of metallocene catalyst and diatomite, which is applied in the field of diatomite-supported metallocene catalyst and its preparation, can solve the problem that the use of metallocene carrier has not been greatly studied, and achieve the effect of low cost and cost reduction

Inactive Publication Date: 2019-01-08
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Despite diatomaceous earth's unique combination of physical and chemical properties, its use as a metallocene support has not been largely studied

Method used

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  • Diatomite-loaded metallocene catalyst as well as preparation method and application thereof
  • Diatomite-loaded metallocene catalyst as well as preparation method and application thereof
  • Diatomite-loaded metallocene catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Catalyst loading

[0028] Using Diatomaceous Earth RS400 # to support metallocene catalysts. The specific loading process is as follows: under the protection of nitrogen, first add 0.5 g of the carrier to be loaded into a self-made filter Schlenk reactor, disperse it with 20 mL of toluene solvent, and then add 0.1 mL of MMAO through a syringe to remove trace water. The Al content is 0.1mmol, and then the Cp prepared in advance is added to the reactor with a syringe. 2 ZrCl 2 8.88 mL of the solution, in which the Zr content was 0.176 mmol, was stirred for 2 h, filtered, and the filter cake was dried to obtain 0.82 g of a diatomite-supported metallocene catalyst, which was labeled as Cat01.

Embodiment 2

[0030] Catalyst loading

[0031] Using Diatomaceous Earth RS400 # to support metallocene catalysts. The specific loading process is as follows: under nitrogen protection, first add 0.5 g of the carrier to be loaded into a self-made filter Schlenk reactor, disperse it with 20 mL of toluene solvent, and then add 100 mL of MMAO through a syringe to remove traces of water, in which Al The content is 100mmol, and then add the pre-prepared Cp to the reactor with a syringe 2 ZrCl 2 8.88 mL of the solution, in which the Zr content was 0.176 mmol, was stirred for 2 h, filtered, and the filter cake was dried to obtain 1.2 g of a diatomite-supported metallocene catalyst, which was labeled as Cat02.

Embodiment 3

[0033] Catalyst loading

[0034] Using Diatomaceous Earth RS400 # to support metallocene catalysts. The specific loading process is as follows: under the protection of nitrogen, first add 0.5 g of the carrier to be loaded into a self-made filter Schlenk reactor, disperse it with 20 mL of toluene solvent, and then add 1 ml of MMAO through a syringe to remove traces of water, in which Al The content is 1mmol, and then add the pre-prepared Cp into the reactor with a syringe 2 ZrCl 2 8.88 mL of the solution, in which the Zr content was 0.176 mmol, was stirred for 2 h, filtered, and the filter cake was dried to obtain 0.87 g of a diatomite-supported metallocene catalyst, which was labeled as Cat03.

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Abstract

The invention disclosed a diatomite-loaded metallocene catalyst. The diatomite-loaded metallocene catalyst is prepared by a method comprising the following steps: under the protection of an inert gas,dispersing diatomite in a solvent, then adding modified methylaluminoxane, stirring to remove trace water, then adding zirconocene dichloride, stirring for 1-3h, then filtering, and drying a filter cake to obtain the diatomite-loaded metallocene catalyst. The obtained diatomite-loaded metallocene catalyst can be applied to catalysis of ethylene polymerization. A carrier used by the diatomite-loaded metallocene catalyst is diatomite ore, and compared with a synthetic magnesium chloride or silicon dioxide carrier, the diatomite ore can reduce the cost of the catalyst under the premise of an equivalent effect.

Description

(1) Technical field [0001] The invention relates to a diatomite-supported metallocene catalyst, a preparation method and application thereof. (2) Background technology [0002] Since the discovery of the Kaminsky-Sinn catalyst, considerable effort has been devoted to improving and modifying this catalyst system. Metallocene / aluminoxane systems offer many advantages over conventional Ziegler-Natta catalysts. For example, they allow control of tacticity and enable copolymerization of polar monomers. However, catalyst loading is an important prerequisite for industrial gas phase and slurry polymerization processes. The catalyst support acts as a template during the growth of these particles and controls the size and morphology of the resulting polymer. In this regard, the mechanical strength and crushability of the catalyst support should be balanced. Most of the world's polyolefin catalysts use inorganic materials such as MgCl 2 or SiO 2 carry out the load. [0003] Dia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F110/02C08F4/02C08F4/6592
CPCC08F110/02C08F4/02C08F4/6592
Inventor 雷金化王竹倩邱化玉
Owner HANGZHOU NORMAL UNIVERSITY
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