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Supported olefin polymerization catalyst, preparation method and application thereof

A technology for olefin polymerization and catalysts, which is applied in the field of supported olefin polymerization catalysts and their preparation and application, and can solve problems such as high cost, complicated preparation methods, and difficult catalyst forms

Active Publication Date: 2013-10-16
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In summary, although a lot of work has been carried out in the field of Ziegler-Natta catalysts, the traditional MgCl 2 Carrier and MgCl 2 / SiO 2 Composite carrier-supported Ziegler-Natta catalysts still have disadvantages such as complicated preparation methods, high cost, and difficult catalyst morphology control. Therefore, it is still necessary to develop a catalyst with simple preparation methods, low cost, and controllable catalyst morphology and performance High Efficiency Ziegler-Natta Catalyst

Method used

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  • Supported olefin polymerization catalyst, preparation method and application thereof
  • Supported olefin polymerization catalyst, preparation method and application thereof
  • Supported olefin polymerization catalyst, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0184] 10g silica gel (pore volume is 1.5-1.7cm 3 / g, the surface area is 250-300m 2 / g) impregnated in magnesium nitrate aqueous solution (Mg loading is 15wt%), continuously stirred and impregnated at room temperature for 5h, then heated to 120°C for 5h, and then transferred to 120°C oven for 6h; the silica gel carrier impregnated with magnesium nitrate Place it in a quartz fluidized bed for roasting activation, use a nitrogen atmosphere before 300°C, then switch to high-purity air, and keep it at 600°C for 4 hours, then switch to a nitrogen atmosphere after cooling down to 400°C naturally, and protect it in a nitrogen atmosphere Down transfer, the above-mentioned roasting temperature control program is as follows figure 1 shown. Get the catalyst precursor that 2g obtains in 30mlTiCl 4 The solution was reacted at 140° C. for 2 h, washed several times with n-hexane at room temperature, and finally vacuum-dried to obtain a catalyst for storage until use.

Embodiment 2

[0186] 10g silica gel (pore volume is 1.5-1.7cm 3 / g, the surface area is 250-300m 2 / g) impregnated in an aqueous solution of magnesium acetate (Mg loading is 15wt%), impregnated with continuous stirring at room temperature for 5 hours, then heated to 120°C for 5 hours, and then transferred to a 120°C oven for 6 hours; the silica gel carrier impregnated with magnesium acetate Place it in a quartz fluidized bed for roasting activation, use a nitrogen atmosphere before 300°C, then switch to high-purity air, and keep it at 600°C for 4 hours, then switch to a nitrogen atmosphere after cooling down to 400°C naturally, and protect it in a nitrogen atmosphere Down transfer, the above-mentioned roasting temperature control program is as follows figure 1 shown. Get the catalyst precursor that 2g obtains in 30mlTiCl 4The solution was reacted at 140° C. for 2 h, washed several times with n-hexane at room temperature, and finally vacuum-dried to obtain a catalyst for storage until use...

Embodiment 3

[0188] 10g silica gel (pore volume is 1.5-1.7cm 3 / g, the surface area is 250-300m 2 / g) impregnated in an aqueous solution of magnesium acetate (Mg loading is 15wt%), impregnated with continuous stirring at room temperature for 5 hours, then heated to 120°C for 5 hours, and then transferred to a 120°C oven for 6 hours; the silica gel carrier impregnated with magnesium acetate Place it in a quartz fluidized bed for roasting activation, use a nitrogen atmosphere before 300°C, then switch to high-purity air, and keep it at 600°C for 4 hours, then switch to a nitrogen atmosphere after cooling down to 400°C naturally, and protect it in a nitrogen atmosphere Down transfer, the above-mentioned roasting temperature control program is as follows figure 1 shown. Get the catalyst precursor that 2g obtains in 30mlTiCl 4 The solution was reacted at 140°C for 2 hours, washed three times with n-hexane at 70°C, washed several times at room temperature, and finally dried in vacuum to obtai...

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Abstract

The invention discloses a supported olefin polymerization catalyst, a preparation method thereof, and an application of the supported olefin polymerization catalyst in production of olefin homopolymer and olefin copolymer. The supported olefin polymerization catalyst mainly comprises a multihole carrier A, a magniferous carrier B, and a supported transition-metallic-titanium-contained active component and is a compound supported efficient Ziegler-Natta titanium catalyst formed by a magnesium compound and a silicon compound. The raw material for the carrier of the magnesium compound is any soluble magnesium salt. The compound carrier supported olefin polymerization catalyst can be used for preparing the olefin homopolymer or olefin copolymer. The catalyst is simple in preparation method, low in cost, easy to control the form, and excellent in polymerization performance. By changing the type and dosage of an organic metal promoter, molecular weight modifier and other factors, the molecular weight and molecular weight distribution of the olefin homopolymer or olefin copolymer, and content and distribution of a comonomer can be conveniently and easily adjusted, therefore, a polymer product with required performance is acquired.

Description

technical field [0001] The invention relates to a supported olefin polymerization catalyst and its preparation method and its application in the production of olefin homopolymer and olefin copolymer. The catalyst has the characteristics of simple preparation, low cost, high activity, hydrogen tuning response and excellent copolymerization performance. Background technique [0002] Polyethylene is the variety with the largest output among general-purpose synthetic resins. It has the characteristics of chemical resistance, good mechanical strength, and electrical insulation; polypropylene is a thermoplastic synthetic resin with excellent performance, which is non-toxic, stable in chemical properties, It has the advantages of easy processing and other advantages, and is the product with the best heat resistance among general-purpose resins. Both polyethylene and polypropylene are widely used in human daily life, medical care, industry and agriculture, etc. These polyolefin pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/00C08F4/646C08F4/649C08F4/658C08F4/02
CPCC08F10/00C08F2410/01C08F2410/06C08F110/02C08F2500/04C08F110/06C08F210/16C08F210/14C08F4/6548C08F4/025C08F4/651C08F4/6555C08F4/02C08F4/16C08F2410/04
Inventor 王静文刘柏平程瑞华何雪莲刘振
Owner EAST CHINA UNIV OF SCI & TECH
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