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Magnesium chloride/mesoporous molecular sieve bisupported Ziegler-Natta polyethylene catalyst, preparation and use

A mesoporous molecular sieve and dual-carrier technology, which is applied to magnesium chloride/mesoporous molecular sieve dual-carrier supported Ziegler-Natta polyethylene catalyst, preparation method and application field, can solve the problem of large volume ratio, high structural strength of mesoporous molecular sieve, and large specific surface. And other issues

Inactive Publication Date: 2009-05-20
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] MgCl 2 Combined with mesoporous molecular sieves to prepare a composite carrier, it can not only give full play to the advantages of mesoporous molecular sieves, such as high structural strength, large volume ratio, and large specific surface, but also make full use of MgCl 2 with TiCl 4 The special matching relationship is a good development direction for catalyst loading, and MgCl has not yet been used 2 A report on a Ziegler-Natta polyethylene catalyst supported on a dual-carrier composite with a mesoporous molecular sieve

Method used

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  • Magnesium chloride/mesoporous molecular sieve bisupported Ziegler-Natta polyethylene catalyst, preparation and use
  • Magnesium chloride/mesoporous molecular sieve bisupported Ziegler-Natta polyethylene catalyst, preparation and use
  • Magnesium chloride/mesoporous molecular sieve bisupported Ziegler-Natta polyethylene catalyst, preparation and use

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Dried mesoporous molecular sieve MCM-411.0g with a pore size of 3.87nm in a vacuum oven at a temperature of 120°C for 6 hours, added it to a loaded reaction bottle, added 50ml of toluene to suspend it, and stirred it in a water bath at 50°C for 2 hours to disperse it Evenly, add 3.3ml of 3mol / L tetrahydrofuran solution of methylmagnesium chloride, stir for 4 hours, filter, wash with toluene, and suspend in 50ml toluene again; in ice-water bath, add analytically pure diisophthalic acid 0.2ml of butyl ester, stirred for 1 hour, added 2.0ml of titanium tetrachloride, continued to stir for 2 hours, raised the temperature to 50°C, continued to stir for 24 hours, filtered, washed with toluene, and dried in vacuum to obtain a gray catalyst powder, marked as catl, Ti content is 6.28wt%, Mg content is 8.68wt%.

Embodiment 2

[0025] The mesoporous molecular sieve MCM-41 with a pore size of 3.87nm in Example 1 was replaced with the mesoporous molecular sieve MCM-41 with a pore size of 4.50nm, and other conditions remained unchanged to obtain a gray catalyst powder, marked as cat2.

Embodiment 3

[0027] In Example 1, the mesoporous molecular sieve MCM-41 with a pore size of 3.87nm was replaced with a mesoporous molecular sieve SBA-15 with a pore size of 9.0nm, and other conditions remained unchanged to obtain a taupe catalyst powder, which was marked as cat3, Ti The Mg content is 4.75wt%, and the Mg content is 6.64wt%.

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Abstract

The invention relates to a Ziegler-Natta polyethylene catalyst loaded by double carriers of magnesium chloride / mesoporous molecular sieve, a preparation method and an application thereof. The catalyst is made up by taking titanium tetrachloride as a main catalyst of active components and organic aluminum as a cocatalyst. The double carriers of the magnesium chloride / mesoporous molecular sieve are taken as a carrier; an organic reagent of magnesium is used, by the breaking and creation of chemical bonds, Si-O-Mg bond is generated so as to obtain a complex carrier with clear structure. The dried mesoporous molecular sieve is suspended in toluene and added with tetrahydrofuran solvent of methyl magnesium chloride; the methyl magnesium chloride on a surface is reacted with silanol group to form the Si-O-Mg bond; and an obtained complex carrier has the frame of the mesoporous molecular sieve and the surface of the magnesium chloride, and can possess the advantages of the double carriers. The active titanium is loaded on the double carriers of chloride / mesoporous molecular sieve to catalyze the polymerization of ethane, thereby obtaining polyethylene with a super molecular weight of 600 thousand to 7 million.

Description

technical field [0001] The present invention is a magnesium chloride / mesoporous molecular sieve dual-carrier loaded Ziegler-Natta polyethylene catalyst, a preparation method and application, specifically a polyethylene catalyst with magnesium chloride / mesoporous molecular sieve as a composite carrier and an active titanium component loaded and its preparation law and application. Background technique [0002] Polyolefin resin is a kind of resin with excellent performance and low price. It occupies the largest share of synthetic resin. It is one of the pillars of polymer synthetic material industry and is widely used. Catalyst technology is the core technology of polyolefin resin. It has gone through several important stages such as Ziegler-Natta, metallocene, and post-transition metal. Products with novel structures have been synthesized, but there are still many shortcomings. The most obvious disadvantages are that the use of homogeneous catalysts in the process of catalyz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F4/658C08F4/02C08F10/02
Inventor 周光远李栋梁雷金化
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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