Load type non-metallocene catalyst and preparation thereof

A non-metallocene and non-metallocene ligand technology, which is applied to the combined supported non-metallocene catalyst. Specifically, it can solve problems such as high vacuum, low olefin polymerization activity, and high temperature in the loading process.

Active Publication Date: 2009-04-22
SINOPEC YANGZI PETROCHEM
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Patent EP708116 discloses that gasified zirconium tetrachloride is contacted and loaded with a carrier at a temperature of 160-450 ° C, and then the loaded zirconium tetrachloride is reacted with a lithium salt of a ligand to obtain a supported metallocene catalyst, and then It is used for the polymerization of olefins by coordinating with co-catalysts. The problem with this catalyst is that the loading process requires high temperature and high vacuum, and is suitable for industrial production.
[0016] Nevertheless, the common problem of supported non-metallocene catalysts in the prior art is that the olefin polymerization activity is low and difficult to adjust, and in order to improve its polymerization activity, a higher amount of cocatalyst must be assisted in olefin polymerization. In addition, when using the supported non-metallocene catalysts of the prior art, the obtained polymers such as polyethylene have low polymer bulk density and poor polymer morphology. Moreover, the supported non-metallocene catalysts existing in the prior art The catalyst also has the problem of unstable performance.

Method used

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  • Load type non-metallocene catalyst and preparation thereof
  • Load type non-metallocene catalyst and preparation thereof
  • Load type non-metallocene catalyst and preparation thereof

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preparation example Construction

[0118]First, the present invention relates to a preparation method of a supported non-metallocene catalyst, comprising the following steps: dissolving a magnesium compound in a mixed solvent composed of tetrahydrofuran and alcohol to obtain a magnesium compound solution; making a porous carrier and the magnesium compound The steps of mixing the solutions to obtain a mixed slurry; adding a solvent for precipitation to the mixed slurry to precipitate it to obtain a composite carrier; treating the composite carrier with one selected from a chemical treatment agent and a non-metallocene ligand to obtain The treatment step of modifying the composite support, wherein the chemical treatment agent is selected from Group IVB metal compounds; and contacting the modified composite support with another party selected from the chemical treatment agent and the non-metallocene ligand , so as to obtain the contact step of the supported non-metallocene catalyst.

[0119] The steps to obtain th...

Embodiment 1

[0308] The porous carrier adopts silica gel, the model is ES757 of Ineos Company, and it is heated at 600°C and N 2 After continuous roasting under atmosphere for 4 h, it was ready for use.

[0309] Dissolve 5g of anhydrous magnesium chloride in a mixed system of tetrahydrofuran and ethanol, heat to 60°C and stir for 1.5 hours to form a solution, then add the heat-activated silica gel to the solution, and stir at 60°C for 2 hours to form a transparent system. Then 50ml of hexane was added to precipitate the magnesium compound, then filtered, washed once with 50ml of hexane, and dried to obtain a composite carrier.

[0310] Add 50ml of hexane to the composite carrier, stir and add titanium tetrachloride dropwise over 30 minutes, stir and react at 60°C for 4 hours, filter, wash with hexane for 3 times, each hexane consumption is 25ml, and then heat to 90°C Dry for 2 hours to obtain the modified composite carrier.

[0311] the structural formula The non-metallocene ligand was...

Embodiment 1-1

[0315] Basically the same as Example 1, but with the following changes:

[0316] Magnesium chloride was changed to magnesium bromide.

[0317] Ethanol was changed to propanol.

[0318] Magnesium compounds were precipitated with decane and washed 3 times with decane.

[0319] The non-metallocene ligand is changed to

[0320] Wherein, the mass ratio of magnesium bromide to the porous carrier is 1:2, the molar ratio to tetrahydrofuran is 1:40, the molar ratio to ethanol is 1:0.57, and the proportioning ratio of titanium tetrachloride to the composite carrier is 15.2 mmol : 1 gram. The mass concentration of the non-metallocene ligand is 0.11 g / ml, the mass ratio of the non-metallocene ligand to the modified composite carrier is 0.22:1, and the solvent for dissolving the non-metallocene ligand is changed to toluene.

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Abstract

The invention relates to a supported non-metallocene catalyst. The supported non-metallocene catalyst is obtained by a non-metallocene ligand and a transition metal compound which directly react on a carrier through an in-situ supporting method. The preparation method for the supported non-metallocene catalyst has simple and feasible process, and the supporting capacity and the polymerization activity of the catalyst have wide adjustable range. When the supported non-metallocene catalyst is combined with a catalyst promoter to catalyze the homopolymerization/copolymerization of olefins, high polymerization activities of the olefins can be obtained only by using small amount of the catalyst promoter.

Description

technical field [0001] The present invention relates to a kind of supported non-metallocene catalyst for olefin polymerization. Specifically, the present invention relates to a kind of supported non-metallocene catalyst, and it is to make non-metallocene ligand and transition metal compound by in-situ loading method Obtained by direct reaction on the carrier. By combining the supported non-metallocene catalyst of the present invention with cocatalysts such as aluminoxane or alkylaluminum, it can be used to catalyze the homopolymerization / copolymerization of olefins. Background technique [0002] The non-metallocene catalysts that appeared in the middle and late 1990s, also known as post-metallocene catalysts, the central atoms of the main catalysts include almost all transition metal elements, which have reached or even surpassed metallocene catalysts in some performance aspects, becoming The fourth generation of olefin polymerization catalysts following Ziegler, Ziegler-Nat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F4/654C08F10/00
Inventor 顾越峰李传峰马忠林刘波王亚明陈韶辉李晓强
Owner SINOPEC YANGZI PETROCHEM
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