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Loaded 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 unsuitability for industrial production, high ash content, and limited use of polymers.

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
[0019] The common problem of the supported non-metallocene catalysts in the prior art is that the olefin polymerization activity is low, and in order to improve its activity, it is necessary to assist a higher amount of cocatalyst
Moreover, in the prior art, due to the use of silica gel and the like as a load carrier, the ash content in the polymer obtained by polymerization is relatively high, thereby limiting the practical use of the polymer
The use of magnesium compound-supported catalysts also limits the significant increase in catalyst activity due to the heterogeneous composition and distribution formed during the preparation process.

Method used

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

Examples

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preparation example Construction

[0084] 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; Adding a precipitation agent to the magnesium compound solution to obtain a modified carrier; and treating the modified carrier with a chemical treatment agent selected from group IVB metal compounds to obtain the supported non-metallocene catalyst.

[0085] The steps for obtaining the magnesium compound solution are specifically described below.

[0086] 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, thereby obtaining the magnesium compound solution.

[0087] As the solvent, for example, C 6-12 Aromatic hydrocarbons, halogenated C 6-12...

Embodiment 1

[0296] 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 ligand, continue to stir at 60 ° C to dissolve completely, after stirring for 2 hours, add precipitant hexane to make it precipitate, filter , washed twice, each time the amount of precipitant was the same as that added before, heated evenly to 90°C and vacuum-dried to obtain a modified carrier.

[0297] Measure 25ml of hexane solvent, join in the modified carrier, add titanium tetrachloride (TiCl) dropwise in 15 minutes under stirring condition 4 ) chemical treatment agent, reacted at 30°C for 4 hours, filtered, washed 3 times with hexane, each 25ml, and finally vacuum-dried to obtain a supported non-metallocene catalyst.

[0298] The non-metallocene ligand adopts the structural formula compound of.

[0299] The ratio is: the molar ratio of the magnesium compound to butanol is ...

Embodiment 1-1

[0302] Basically the same as Example 1, but with the following changes:

[0303] Alcohol is changed to ethanol, and the non-metallocene ligand adopts the structural formula as compound, the precipitant was changed to cyclohexane.

[0304] The ratio is: the molar ratio of magnesium compound to alcohol is 1:1; the ratio of magnesium compound to dissolved magnesium compound solvent is 1mol:240ml; the molar ratio of magnesium compound to non-metallocene ligand is 1:0.006; the precipitation agent and dissolved magnesium The volume ratio of the compound to the solvent is 1:0.5; the molar ratio of the magnesium compound to the chemical treatment agent is 1:0.5.

[0305] This catalyst is designated CAT-1-1.

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Abstract

The invention relates to a loaded non-metallocene catalyst and a preparation method and application thereof. The loaded non-metallocene catalyst has the characteristics of simple and practicable preparation method, flexible and adjustable polymerization activity and the like. The invention also relates to the application of the loaded non-metallocene catalyst to the homopolymerisation / copolymerization of olefin. Compared with the prior art, the application has the characteristic of small using amount of a cocatalyst.

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