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Load type non-metallocene catalyst, preparation method and application thereof

A non-metallocene, supported technology, used in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, 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 low catalytic activity
[0012] 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

Method used

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  • Load type non-metallocene catalyst, preparation method and application thereof
  • Load type non-metallocene catalyst, preparation method and application thereof
  • Load type non-metallocene catalyst, preparation method and application thereof

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preparation example Construction

[0091] According to the present invention, it relates to a preparation method of a supported non-metallocene catalyst, comprising the following steps: dissolving a magnesium compound and a 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; adding a precipitant to the mixed slurry to obtain a composite carrier; and treating the composite carrier with a chemical treatment agent selected from group IV B metal compounds , the step of obtaining the supported non-metallocene catalyst.

[0092] The steps for obtaining the magnesium compound solution are specifically described below.

[0093] Specifically, the magnesium compound (solid) and the non-metallocene complex are dissolved in an appropriate solvent (ie, a solvent for dissolving the magnesium compound), thereby obtaining the magnesium compound solution.

[0094] As the solvent, for example, C 6-12 A...

Embodiment 1

[0318] The magnesium compound adopts anhydrous magnesium chloride, the solvent for dissolving the magnesium compound and the non-metallocene complex adopts tetrahydrofuran, and the chemical treatment agent adopts titanium tetrachloride. The porous carrier adopts silica, that is, silica gel, the model is ES757 of Ineos Company, and the non-metallocene complex adopts the structure of compound of.

[0319] Firstly, the silica gel was continuously fired at 600° C. under nitrogen atmosphere for 4 hours to thermally activate it.

[0320]Weigh 5g of anhydrous magnesium chloride and non-metallocene complex, add tetrahydrofuran solvent and dissolve completely at room temperature, then add heat-activated silica gel, stir for 2 hours, add precipitant hexane to make it precipitate, filter, wash 2 times, The amount of detergent added each time is the same as that added before, and the mixture is heated evenly to 60° C. and dried under vacuum to obtain a composite carrier.

[0321] Then ...

Embodiment 1-1

[0325] Basically the same as Example 1, but with the following changes:

[0326] The porous carrier was changed to Grace's 955, and it was continuously calcined at 400° C. for 8 hours under a nitrogen atmosphere to be thermally activated.

[0327] Non-metallocene complexes using The solvent for dissolving magnesium compounds and non-metallocene complexes was changed to toluene, the precipitation agent was changed to cyclohexane, and the chemical treatment agent was changed to zirconium tetrachloride (ZrCl 4 ).

[0328] The proportioning ratio is as follows: 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; the precipitation agent and dissolved magnesium compound The volume ratio of the solvent to the non-metallocene complex is 1:2; the molar ratio of the magnesium compound to the chemical treatment agent is 1:0.20.

[0329] Supp...

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Abstract

The invention relates to a load type non-metallocene catalyst and a preparation method thereof. The load type non-metallocene catalyst has the characteristics of simple preparation method, flexible and adjustable polymerization activity and the like, and synergistic reaction which is beneficial to activity development is formed between non-metallocene complexes and chemical conditioning agents inthe catalyst. The invention also relates to the application of the load type non-metallocene catalyst in olefin homopolymerization / copolymerization. Compared with the prior art, the application has the characteristic of less cocatalyst amount.

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] 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 after 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 ind...

Claims

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Application Information

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IPC IPC(8): B01J31/26B01J31/22B01J31/24B01J37/00C08F10/00C08F10/02C08F4/654
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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