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Process for preparing supported metallocene catalyst

A metallocene catalyst and catalyst technology, which are applied in the field of preparation of supported metallocene catalysts

Inactive Publication Date: 2009-03-25
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, examples of supported metallocene catalysts for functionalization of polypropylene have not been reported yet.

Method used

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  • Process for preparing supported metallocene catalyst
  • Process for preparing supported metallocene catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: 24 grams of MgCl 2 Add 50ml of ethanol, 390ml of white vaseline oil, and 10ml of silicone oil into the autoclave, heat and stir the solution until the solution is uniform, pass nitrogen to make the pressure rise to 1MPa, open the valve, let the mixture in the kettle pass through a 1.2mm, 3.5m long thin tube, spray into 2.5 L of kerosene, washed 5 times with hexane, and dried at room temperature. Then add 220ml of TiCl4, and 3ml of diisobutyl phthalate. Stir and heat up to 200°C for 1.5 hours. The product was obtained by washing with toluene 4 times. Ti content is 5.96%

Embodiment 2

[0035] Embodiment 2: 24 grams of MgCl 2 Add 50ml of ethanol, 390ml of white vaseline oil, and 10ml of silicone oil into the autoclave, heat and stir the solution until the solution is uniform, pass nitrogen to make the pressure rise to 1MPa, open the valve, let the mixture in the kettle pass through a 1.2mm, 3.5m long thin tube, spray into 2.5 L of kerosene, washed 5 times with hexane, and dried at room temperature. Then 160ml of TiCl4 was added, and 1.4ml of dibutyl phthalate. Stir and heat up to 110°C for 1.5 hours. Washed 4 times with hexane to obtain the product with a Ti content of 3.38%

Embodiment 3

[0036] Embodiment 3: 24 grams of MgBr 2 Add 50ml of ethanol, 390ml of white vaseline oil, and 10ml of silicone oil into the autoclave, heat and stir the solution until the solution is uniform, pass nitrogen to make the pressure rise to 1MPa, open the valve, let the mixture in the kettle pass through a 1.2mm, 3.5m long thin tube, spray into 2.5 L of kerosene, washed 5 times with hexane, and dried at room temperature. Then 30ml of TiCl4, and 0.4ml of dibutyl phthalate were added. Stir and heat up to 80°C for 1.5 hours. Four washes with heptane followed by one wash with hexane gave the product with a Ti content of 1.12%

[0037] Preparation of boron-containing polypropylene

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Abstract

The invention discloses a method for producing supported metallocene catalyst: a) at first catalyzing ethylene, propylene, butylene or phenylethene copolymerized with olefin consisting of boron by titanic chloride (TiCl4)Ziegler-Natta; b) then oxidative hydrolyzing it under alkalinity condition, to get polypropylene provided with hydroxyl group; c) at last supporting metallocene catalyst. supported metallocene catalyst produced by such method can be used in olefin polymerization reaction, with high reactivity and higher catalytic activity than homopolypropylene. Moreover, the catalyst activity can be adjusted by hydroxyl content in polypropylene copolymer. And such catalyst would save 50 percent activity after dispensing in the air for four days. It can be used for ethane polymerization reaction, and the more catalyst is used, the more activity and molecular weight is got; so to adjust the properties of polymer.

Description

technical field [0001] The invention relates to a preparation method of a catalyst, in particular to a preparation method of a supported metallocene catalyst. Background technique [0002] The metallocene catalyst has a single catalytic active center, and the generated polymer has a narrow molecular weight distribution and a uniform distribution of comonomers, which can generate syndiotactic copolymers and enable most comonomers to participate in polymerization; thus realizing the molecular design of polymers . However, metallocene catalysts are homogeneous catalysts, and the resulting polymers have poor morphology and are not suitable for gas-phase processes. Therefore, the support of metallocene catalysts has become a research hotspot. Supported metallocene catalysts have the advantage of being capable of both heterogeneous and homogeneous catalysis. Currently, supported metallocene catalysts mainly include catalysts supported by SiO2, MgCl2, ZSM-5 molecular sieves, MCM...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F4/76C08F4/02C08F10/02
Inventor 董金勇刘继广
Owner INST OF CHEM CHINESE ACAD OF SCI
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