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

A non-metallocene and non-metallocene ligand technology, applied in the field of non-metallocene catalysts, can solve problems such as difficult adjustment, unfavorable stable operation of polymerization production, and low olefin polymerization activity

Inactive Publication Date: 2012-04-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the IVB group metal compound is distributed on the surface of the catalyst, the activity is high at the initial stage of polymerization, and it is difficult to control the polymerization temperature, which is also not conducive to the stable operation of polymerization production.
[0015] 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
For the non-metallocene catalyst supported by a single carrier on a porous carrier, the carrier needs to be treated with a chemical reagent such as alkylaluminum after thermal activation treatment. For the non-metallocene catalyst supported by a single carrier of a magnesium compound, the preparation conditions need to be strictly controlled. Polymerization of olefins with good morphology

Method used

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

Examples

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preparation example Construction

[0078] The invention relates to a preparation method of a supported non-metallocene catalyst, comprising the following steps: reacting a chemical treatment agent selected from group IVB metal compounds with a porous carrier optionally subjected to thermal activation treatment to obtain a modified carrier; making the obtained The step of contacting the modified support with the non-metallocene ligand in the presence of a solvent to obtain a mixed slurry; and directly drying the mixed slurry to obtain the supported non-metallocene catalyst.

[0079] The porous carrier will be specifically described below.

[0080] According to the present invention, as the porous support, for example, those organic or inorganic porous solids conventionally used as supports in the production of supported olefin polymerization catalysts in the art can be cited.

[0081] Specifically, examples of the organic porous solid include olefin homopolymers or copolymers, polyvinyl alcohol or copolymers the...

Embodiment 1

[0241] The porous carrier is silicon dioxide, that is, silica gel, model ES757 of Ineos Company. First, the silica gel is thermally activated by continuously calcining at 600° C. for 4 hours under a nitrogen atmosphere.

[0242] The chemical treatment agent is titanium tetrachloride (TiCl 4 ). Weigh 5g of thermally activated silica gel, add 60ml of hexane, add titanium tetrachloride under normal temperature stirring conditions, react at 60°C for 2h, filter, wash with hexane 3 times, 60ml each time, and finally vacuum dry to obtain modified carrier.

[0243] Tetrahydrofuran is used as the solvent for dissolving the non-metallocene ligands. The non-metallocene ligand adopts the structure compound of.

[0244] Weigh the non-metallocene ligand, add tetrahydrofuran solvent and dissolve completely at room temperature to obtain a non-metallocene ligand solution, then add the modified carrier, stir for 2 hours, heat the obtained mixed slurry evenly to 60°C, and then directly evac...

Embodiment 2

[0248] Basically the same as Example 1, but with the following changes:

[0249] 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. The chemical treatment agent was changed to zirconium tetrachloride (ZrCl 4 ), hexane was changed to toluene.

[0250] Non-metallocene ligands use The solvent used to dissolve the non-metallocene ligands was changed to toluene, and the obtained mixed slurry was evenly heated to 100° C., and then directly vacuum-dried to obtain a supported non-metallocene catalyst.

[0251] Wherein the ratio is, the molar ratio of the non-metallocene ligand to the chemical treatment agent is 1:6, the mass ratio to the porous carrier is 1:1, and the ratio to the solvent for dissolving the non-metallocene ligand is 1g:30ml .

[0252] Supported non-metallocene catalysts are designated CAT-2.

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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 is characterized by simple and feasible preparation technology, controllable contents of non-metallocene ligand and non-metallocene complex produced through in-situ synthesis by using the non-metallocene ligand and a chemical processing agent, substantial copolymerization effect, and the like. The invention also relates to an application of the load-type non-metallocene catalyst in alkene homopolymerization / copolymerization. Compared to prior arts, the application is characterized by simple preparation process, high alkene polymerization catalytic activity, high polymer bulk density, and narrow and controllable molecular weight distribution.

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] Non-metallocene catalysts, also known as post-metallocene catalysts, appeared in the mid-to-late 1990s. The central atom of the main catalyst includes almost all transition metal elements, and has reached or even surpassed metallocene catalysts in some aspects. It becomes the fourth generation olefin polymerization catalyst following 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 indenyl and fluorenyl, etc., ...

Claims

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Application Information

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IPC IPC(8): C08F10/00C08F4/646C08F4/642C08F4/02
Inventor 李传峰阚林任鸿平柏基业郭峰马忠林汪开秀陈韶辉杨爱武王亚明
Owner CHINA PETROLEUM & CHEM CORP
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