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Supported non-metallocene catalyst, preparation method and application thereof

A non-metallocene, supported technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of low catalytic activity, low olefin polymerization activity, difficult to adjust, etc.

Active Publication Date: 2011-05-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Catalysts supported on anhydrous magnesium chloride show high catalytic activity in olefin polymerization, but such catalysts are very brittle and break easily in the polymerization reactor, resulting in poor polymer morphology
Silica-supported catalysts have good fluidity and can be used in gas-phase fluidized bed polymerization, but silica-supported metallocene and non-metallocene catalysts show lower catalytic activity
[0011] Nevertheless, the ubiquitous problems of the supported non-metallocene catalysts in the prior art are that the loading process is complicated, and generally requires multi-step treatment of the support before loading the non-metallocene complexes, and the olefin polymerization activity is low and difficult to adjust. , and in order to improve its polymerization activity, a higher amount of co-catalyst must be assisted in the polymerization of olefins
Moreover, since the non-metallocene complexes are loaded on the treated carrier, there are still problems such as stability.

Method used

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  • Supported non-metallocene catalyst, preparation method and application thereof
  • Supported non-metallocene catalyst, preparation method and application thereof
  • Supported non-metallocene catalyst, preparation method and application thereof

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preparation example Construction

[0080] According to the present invention, it relates to a method for preparing a supported non-metallocene catalyst, which includes the following steps: dissolving magnesium compound and non-metallocene complex in a solvent to obtain a magnesium compound solution; The step of mixing the porous carrier with the magnesium compound solution to obtain a mixed slurry; and the step of adding a precipitation agent to the mixed slurry to obtain the supported non-metallocene catalyst.

[0081] The steps for obtaining the magnesium compound solution will be specifically described below.

[0082] Specifically, the magnesium compound (solid) and the non-metallocene complex are dissolved in an appropriate solvent (that is, a solvent for dissolving the magnesium compound) to obtain the magnesium compound solution.

[0083] As the solvent, for example, C 6-12 Aromatic hydrocarbons, halogenated C 6-12 Solvents such as aromatic hydrocarbons, esters and ethers. Specific examples include toluene, xyl...

Embodiment 1

[0237] The magnesium compound is anhydrous magnesium chloride, and the solvent for dissolving the magnesium compound and the non-metallocene complex is tetrahydrofuran. The porous carrier uses silica, that is, silica gel, the model is ES757 of Ineos Company, and the structure of the non-metallocene complex is compound of.

[0238] First, the silica gel is continuously calcined at 600°C under a nitrogen atmosphere for 4 hours to be thermally activated.

[0239] Weigh 5g of anhydrous magnesium chloride and non-metallocene complex, add tetrahydrofuran solvent and completely dissolve at room temperature, then add heat-activated silica gel, stir for 2 hours, add precipitation agent hexane to make precipitation, filter and wash 2 times. The amount of precipitant used for each time is the same as before, and it is evenly heated to 90° C. and vacuum-dried to obtain a supported non-metallocene catalyst.

[0240] The ratio of magnesium chloride to tetrahydrofuran is 1mol:210ml; the molar rat...

Embodiment 2

[0243] It is basically the same as embodiment 1, but has the following changes:

[0244] The porous carrier was changed to 955 made by Grace Company, and it was thermally activated by continuous firing at 400°C under a nitrogen atmosphere for 8 hours.

[0245] Non-metallocene complex use The solvent for dissolving the magnesium compound and the non-metallocene complex was changed to toluene, and the precipitating agent was changed to cyclohexane.

[0246] The ratio of magnesium compound to toluene is 1mol:150ml; the molar ratio of magnesium compound to non-metallocene complex is 1:0.15; the mass ratio of magnesium compound to porous carrier is 1:4, and the precipitant and the dissolved magnesium compound The solvent volume ratio of the non-metallocene complex is 1:2.

[0247] The supported non-metallocene catalyst is referred to as CAT-2.

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Abstract

The invention relates to a supported non-metallocene catalyst and a preparation method thereof. The supported non-metallocene catalyst has the characteristics of simple and feasible preparation method, flexible and adjustable polymerization activity and the like. The invention also relates to application of the supported non-metallocene catalyst in homopolymerization / copolymerization of olefins.Compared with the prior art, the consumption of a cocatalyst is low in the application.

Description

Technical field [0001] The invention relates to a non-metallocene catalyst. Specifically, the present invention relates to a supported non-metallocene catalyst, its preparation method and its application in olefin homopolymerization / copolymerization. Background technique [0002] Non-metallocene catalysts appeared in the mid-to-late 1990s, also known as post-catalysts. The central atom of the main catalyst includes almost all transition metal elements. It has reached or even surpassed metallocene catalysts in some aspects of performance. The fourth generation olefin polymerization catalyst after Ziegler, Ziegler-Natta and metallocene catalysts. The polyolefin products manufactured by this type of catalyst have excellent performance and low manufacturing cost. The coordinating atoms of non-metallocene catalysts are oxygen, nitrogen, sulfur and phosphorus, and do not contain cyclopentadiene group or its derivative groups, such as indenyl and fluorenyl, etc. It is characterized by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/26B01J31/22B01J31/24B01J37/03C08F10/00C08F4/645C08F4/654
Inventor 李传峰任鸿平姚小利马忠林郭峰汪开秀刘经伟王亚明杨立娟
Owner CHINA PETROLEUM & CHEM CORP
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