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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 unstable performance, difficult adjustment, and poor polymer morphology.

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

AI Technical Summary

Problems solved by technology

The problem with this catalyst is that the loading process requires high temperature and high vacuum, which is suitable for industrial production.
[0016] Even so, the common problem of the 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 when carrying out 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

[0114] 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; drying the mixed slurry to obtain a composite carrier; treating the composite carrier with one selected from a chemical treatment agent and a non-metallocene ligand to obtain a modified composite carrier , wherein the chemical treatment agent is selected from group IVB metal compounds; and the modified composite carrier is contacted with another party selected from the chemical treatment agent and the non-metallocene ligand, thereby obtaining the loaded Contact steps for non-metallocene catalysts.

[0115] The steps to obtain the magnesium compound solution are first described below.

[0116] Accord...

Embodiment 1

[0300] The porous carrier adopts silica gel (ES757 of Ineos Company). The silica gel was continuously roasted at 600°C for 4 hours under a nitrogen atmosphere to thermally activate it. Anhydrous magnesium chloride was used as the magnesium compound, ethanol was used as the alcohol, and titanium tetrachloride was used as the chemical treatment agent.

[0301] Weigh 5g of anhydrous magnesium chloride, add tetrahydrofuran and absolute ethanol, heat to 60°C until completely dissolved, add 10g of heat-activated silica gel while hot, stir evenly, after standing for 12 hours, evenly heat to 90°C and vacuum dry. Obtain 19.6g composite carrier.

[0302] Weigh 5g of the composite carrier, add 50ml of hexane, 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 Dry at 90°C for 4 hours to obtain a modified composite carrier.

[0303] the structural formula...

Embodiment 1-1

[0307] Basically the same as Example 1, but with the following changes:

[0308] The porous carrier adopts aluminum oxide. Aluminum oxide was continuously calcined at 700°C for 6 hours under a nitrogen atmosphere.

[0309] The magnesium compound is changed to magnesium bromide (MgBr 2 ), the alcohol uses butanol, and the chemical treatment agent uses titanium tetrabromide (TiBr 4 ).

[0310] The non-metallocene ligand is changed to The solvent for dissolving non-metallocene ligands was changed to decane.

[0311] The proportioning ratio is as follows: the molar ratio of magnesium bromide to tetrahydrofuran is 1:5; the molar ratio of magnesium bromide to butanol is 1:3.5; the mass ratio of magnesium bromide to porous carrier is 1:1.4; The ratio of the carrier is 7.64 mmol: 1 g. The mass concentration of the non-metallocene ligand is 0.11 g / ml, and the mass ratio of the non-metallocene ligand to the composite carrier is 0.22:1.

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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, the high comonomer effect is showed, and high polymerization activities of the olefins can be obtained only by using small amount of the catalyst promoter at the same time. Moreover, the obtained polymers have good particle morphology and high bulk density.

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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IPC IPC(8): C08F4/654C08F10/00
Inventor 顾越峰姚小利李传峰马忠林王亚明陈韶辉李晓强
Owner SINOPEC YANGZI PETROCHEM
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