Supported non-metallocene catalyst and preparation method and application thereof

A non-metallocene and non-metallocene ligand technology, applied in the field of non-metallocene catalysts, can solve the problems of limiting the performance of the catalyst polymerization product and its particle shape, low catalytic activity, easy to break, etc.

Active Publication Date: 2011-05-18
CHINA PETROLEUM & CHEM CORP +1
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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 not suitable for industrial production
[0017] 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
[0020] It can be seen from the above that the ubiquitous problem of supported non-metallocene catalysts in the prior art is that the heterogeneous composition and distribution formed during the preparation of the catalyst limit the performance of the catalyst polymerization product and its particle shape

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

[0087] 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 ligand in a solvent in the presence of alcohol to obtain a magnesium compound solution; making the optional The step of mixing the thermally activated 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 with a chemical treatment agent selected from group IVB metal compounds The composite carrier is a step of obtaining the supported non-metallocene catalyst.

[0088] The steps for obtaining the magnesium compound solution are specifically described below.

[0089] According to this procedure, a magnesium compound and a non-metallocene ligand are dissolved in an appropriate solvent (ie, a solvent for dissolving the magnesium compound) in the presence of alcohol, thereb...

Embodiment 1

[0319] The magnesium compound is anhydrous magnesium chloride, and the porous carrier is silicon dioxide, that is, silica gel, and the model is ES757 of Ineos Company. Firstly, the silica gel was continuously fired at 600° C. under nitrogen atmosphere for 4 hours to thermally activate it. The alcohol adopts butanol, the solvent for dissolving the magnesium compound adopts tetrahydrofuran, and the non-metallocene ligand adopts the structural formula: compound, the precipitation agent is hexane, and the chemical treatment agent is titanium tetrachloride.

[0320] Weigh 2.5g magnesium compound anhydrous magnesium chloride (MgCl 2 ), add a certain amount of butanol and tetrahydrofuran, heat to 60 ° C to dissolve, add a certain amount of non-metallocene ligands, continue stirring at 60 ° C to completely dissolve, add silica gel to form a mixed slurry, stir for 2 hours, add precipitant Precipitate with alkanes, filter, wash twice, each time the amount of precipitant is the same a...

Embodiment 1-1

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

[0326] Alcohol is changed to ethanol, and the non-metallocene ligand adopts the structural formula as For the compound, the porous carrier was changed to Grace’s 955, and it was thermally activated by continuous calcination at 400°C for 8 hours under a nitrogen atmosphere; the precipitating agent was changed to cyclohexane.

[0327] The ratio is: the molar ratio of the magnesium compound to the alcohol is 1:1; the ratio of the magnesium compound to the solvent for dissolving the magnesium compound is 1mol:240ml; the molar ratio of the magnesium compound to the non-metallocene ligand is 1:0.006; the magnesium compound and the porous The mass ratio of the carrier is 1:1; the volume ratio of the precipitation agent to the solvent for dissolving the magnesium compound is 2:1; and the molar ratio of the magnesium compound to the chemical treatment agent is 1:0.5.

[0328] This catalyst is designated CAT-1-1...

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Abstract

The invention relates to a supported non-metallocene catalyst and a preparation method thereof. The supported non-metallocene catalyst is characterized by a simple and practical preparation method, flexible and adjustable polymerization activity and the like. The invention also relates to an application of the supported non-metallocene catalyst in olefin homopolymerization/copolymerization. The application is characterized in that compared with the prior art, the dosage of the catalyst is lower.

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 mid-to-late 1990s, also known as post-metallocene catalysts, the central atom of the main catalyst includes almost all transition metal elements, which is the fourth generation after Ziegler, Ziegler-Natta and metallocene catalysts Olefin polymerization catalysts, which have reached or even surpassed metallocene catalysts in some performances. The non-metallocene catalyst does not contain cyclopentadiene group, and the coordination atoms are oxygen, nitrogen, sulfur and phosphorus. It is characterized by the strong electrophilicity of the center ion and the cis-alkyl or halogen metal center structure. It is easy to carry out olefin inserti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/38B01J31/24B01J31/22B01J37/00C08F10/00C08F4/654C08F4/658C08F4/02C08F110/02C08F210/02
Inventor 李传峰任鸿平姚小利阚林刘波马忠林郭峰汪开秀王亚明杨立娟
Owner CHINA PETROLEUM & CHEM CORP
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