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Metallocene polyethylene resin, preparation method and applications thereof

A metallocene polyethylene and metallocene catalyst technology, which is applied in the production of bulk chemicals, etc., can solve the problem that alkyl aluminoxane and active components are expensive, reduce the loading rate of active components, consume alkyl aluminoxane, etc. To achieve the effect of promoting development and application, improving hydrogen tuning response performance, and improving surface area and pore volume

Active Publication Date: 2020-04-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the preparation method of the silica gel / magnesium halide composite carrier is to mix the magnesium chloride dissolved in the solvent and the activated silica gel first, so that the activated silica gel removes the water of physical adsorption and chemical combination, and contacts with the magnesium chloride solution. The silica gel will Adsorb and bind hydroxyl groups in magnesium chloride solution, weaken the activation effect, and consume more alkylaluminoxane during catalyst preparation, reduce the loading rate of active components, and alkylaluminoxane and active components are expensive , which greatly increases the cost of catalyst preparation

Method used

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  • Metallocene polyethylene resin, preparation method and applications thereof
  • Metallocene polyethylene resin, preparation method and applications thereof
  • Metallocene polyethylene resin, preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] SiO 2 / MgCl 2 Preparation of composite carrier: First, replace a 250ml three-necked flask with a heating system and a stirring device and a reflux condensing system with nitrogen for no less than three times, then 1g anhydrous magnesium chloride, and add 5ml ethanol to raise the system temperature to 70 ℃, and keep the reaction at this temperature for 0.5 hours to obtain a magnesium alkoxide compound solution; add 4g of 955 silica gel to the magnesium alkoxide compound solution for 2 hours with constant temperature shaking; dry the silica gel / magnesium / alcohol mixture at 100 ℃ in a vacuum oven for 4 hours to get SiO 2 / MgCl 2 composite carrier, while heating the activation furnace to 310 °C. The dried SiO 2 / MgCl 2 The composite carrier was transferred to a quartz tube in an activation furnace, and the flow rate of high-purity nitrogen was adjusted to a replacement rate of 2.5, so that the carrier particles were in a fluidized state and kept at a constant temperatu...

Embodiment 2

[0070] SiO 2 / MgCl 2Preparation of composite carrier: First, replace a 250ml three-necked flask with a heating system and a stirring device and a reflux condensing system with nitrogen for no less than three times, then 1g anhydrous magnesium chloride, and add 5ml ethanol to raise the system temperature to 70 ℃, and keep the reaction at this temperature for 0.5 hours to obtain a magnesium alkoxide compound solution; add 4g of 955 silica gel to the magnesium alkoxide compound solution for 2 hours with constant temperature shaking; dry the silica gel / magnesium / alcohol mixture at 100 ℃ in a vacuum oven for 4 hours to get SiO 2 / MgCl 2 composite carrier, while heating the activation furnace to 350 °C. The dried SiO 2 / MgCl 2 The composite carrier was transferred to a quartz tube in an activation furnace, and the flow rate of high-purity nitrogen was adjusted to a replacement rate of 2.5, so that the carrier particles were in a fluidized state and kept at a constant temperatur...

Embodiment 3

[0074] SiO 2 / MgCl 2 Preparation of composite carrier: First, replace a 250ml three-necked flask with a heating system and a stirring device and a reflux condensing system with nitrogen for no less than three times, then 1g anhydrous magnesium chloride, and add 5ml ethanol to raise the system temperature to 70 ℃, and keep the reaction at this temperature for 0.5 hours to obtain a magnesium alkoxide compound solution; add 4g of 955 silica gel to the magnesium alkoxide compound solution for 2 hours with constant temperature shaking; dry the silica gel / magnesium / alcohol mixture at 100 ℃ in a vacuum oven for 4 hours to get SiO 2 / MgCl 2 composite carrier, while heating the activation furnace to 400 °C. The dried SiO 2 / MgCl 2 The composite carrier was transferred to a quartz tube in an activation furnace, and the flow rate of high-purity nitrogen was adjusted to a replacement rate of 2.5, so that the carrier particles were in a fluidized state and kept at a constant temperatu...

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Abstract

The invention belongs to the technical field of high polymer materials, particularly relates to a metallocene polyethylene resin, and further discloses a preparation method of the metallocene polyethylene resin and applications of the metallocene polyethylene resin in catalytic synthesis of polyethylene. The metallocene polyethylene resin disclosed by the invention is prepared by a polymerizationreaction under the catalysis of a specially-prepared metallocene catalyst, and the obtained polymer resin is good in particle morphology, excellent in performance and low in fine powder rate, and hashigh apparent density (more than 0.30 g / ml).

Description

technical field [0001] The invention belongs to the technical field of macromolecular materials, in particular to a metallocene polyethylene resin, and further discloses a preparation method thereof and an application of catalytic synthesis of polyethylene. Background technique [0002] Polyethylene is the most important general-purpose plastic in the world, which can be widely used in the production of agricultural, food and industrial packaging films, wire and cable covering and coating, synthetic paper and other fields, accounting for about 30% of plastic output. From the perspective of the development history of the polyolefin industry, the development of catalysts is the main driving force for the development of polyethylene production technology, and metallocene-catalyzed polyethylene is a new generation of polyethylene catalyzed by metallocene catalysts. Widespread concern in the plastics industry, which has grown considerably since industrialization in the 1990s. ...

Claims

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Application Information

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IPC IPC(8): C08F110/02C08F4/02C08F4/6592
CPCC08F110/02C08F4/025C08F4/022C08F4/65925C08F2500/18Y02P20/52
Inventor 李晓庆裴小静周建勇鲍春伟严婕李功韬徐晓范大鹏朱卫东
Owner CHINA PETROLEUM & CHEM CORP
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