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Supported non-metallocene catalyst and preparation method and application thereof

A non-metallocene, supported technology, applied in the field of non-metallocene catalysts, can solve the problems of low olefin polymerization activity, complex loading process, difficult to adjust, etc.

Active Publication Date: 2012-04-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Alcohol still exists in this process, and the filtration and washing process will affect the composition control of the final catalyst
[0016] 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, the preparation process requires the presence of alcohol, and a higher amount of co-catalyst must be assisted in the polymerization of olefins

Method used

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

Examples

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preparation example Construction

[0098] The invention relates to a preparation method of a supported non-metallocene catalyst, comprising the following steps: reacting a chemical treatment agent selected from group IVB metal compounds with a porous carrier optionally subjected to thermal activation treatment to obtain a modified carrier; making magnesium Dissolving the compound in the first solvent to obtain a magnesium compound solution; mixing the modified carrier with the magnesium compound solution to obtain a first mixed slurry; adding a precipitant to the first mixed slurry to obtain a composite The step of carrier; making the chemical treatment agent selected from the group IVB metal compound react with the composite carrier to obtain the step of modifying the composite carrier; making the non-metallocene complex and the modified composite carrier in the presence of a second solvent contacting to obtain a second mixed slurry; and directly drying the second mixed slurry to obtain the supported non-metall...

Embodiment 1

[0331] The porous carrier is silicon dioxide, that is, silica gel, model ES757 of Ineos Company. First, the silica gel is thermally activated by continuously calcining at 600° C. for 4 hours under a nitrogen atmosphere.

[0332] The chemical treatment agent is titanium tetrachloride (TiCl 4 ). Weigh 5g of thermally activated silica gel, add 60ml of hexane, add titanium tetrachloride under normal temperature stirring conditions, react at 60°C for 2h, filter, wash with hexane 3 times, 60ml each time, and finally vacuum dry to obtain modified carrier.

[0333] The magnesium compound adopts anhydrous magnesium chloride, the solvent for dissolving the magnesium compound adopts tetrahydrofuran, and the chemical treatment agent adopts titanium tetrachloride. The non-metallocene complex adopts the structure compound of.

[0334] Weigh anhydrous magnesium chloride, add the first solvent tetrahydrofuran and heat to 60°C to dissolve completely, then add the modified carrier, stir fo...

Embodiment 2

[0340] Basically the same as Example 1, but with the following changes:

[0341] Before the chemical treatment agent treats the composite carrier, the auxiliary chemical treatment agent methylaluminoxane (MAO, 10wt% toluene solution) is used to treat the composite carrier.

[0342] Wherein, the molar ratio of the magnesium compound in terms of Mg element to the auxiliary chemical treatment agent methylaluminoxane is 1:0.3.

[0343] Supported non-metallocene catalysts are designated 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 that the preparation process has a large regulation margin, the content of a non-metallocene complex is controllable, and the copolymerization effect is obvious. The invention also relates to the application of the supported non-metallocene catalyst in olefin homopolymerization / copolymerization. And compared with the prior art, the application has the characteristics that activity is high in olefin polymerization catalysis, a polymer has high bulk density and the molecular weight distribution of the polymer can be controlled and adjusted to be narrow.

Description

technical field [0001] The present 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, also known as post-metallocene catalysts, appeared in the mid-to-late 1990s. The central atom of the main catalyst includes almost all transition metal elements, and has reached or even surpassed metallocene catalysts in some aspects. It becomes the fourth generation olefin polymerization catalyst following Ziegler, Ziegler-Natta and metallocene catalysts. The polyolefin product produced by this type of catalyst has excellent performance and low production cost. The coordination atoms of non-metallocene catalysts are oxygen, nitrogen, sulfur and phosphorus, and do not contain cyclopentadiene groups or their derivative groups, such as indenyl and fluorenyl, etc., ...

Claims

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Application Information

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IPC IPC(8): C08F4/654C08F4/02C08F10/00
Inventor 任鸿平李传峰郭峰阚林柏基业马忠林陈韶辉汪开秀王亚明陈海滨杨爱武
Owner CHINA PETROLEUM & CHEM CORP
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