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A kind of composite carrier catalyst for olefin polymerization and preparation method thereof

A composite carrier and olefin polymerization technology, which is applied in the field of composite carrier catalysts for olefin polymerization and its preparation, can solve the problems of reactants sticking to the kettle, serious problems, poor polymer morphology, etc., achieve high polymerization activity, increase bulk density, fine powder Reduced effect

Inactive Publication Date: 2018-11-16
常爱荣
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the direct use of such metallocene compounds in olefin polymerization catalysts requires reaction in a homogeneous system, resulting in poor morphology of the prepared polymers, severe sticking of the reactants, and difficulty in handling the reaction products. These problems limit the use of metallocene catalysts in the industry. application on

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A composite carrier catalyst for olefin polymerization, mainly composed of the following components by weight: 3 parts of composite carrier, 1 part of diethyl succinate, 0.1 part of dimethoxypropane, 0.02 part of aliphatic ketone, and 0.3 part of phosphine sulfonate , 0.1 part of naphthalene dicarboxylate; the composite carrier is a mixture of fine particle carrier and modified silicon dioxide powder in a mass ratio of 1.2:1.

[0021] Wherein, the preparation method of the fine particle carrier is: select the montmorillonite group such as hectorite, stevensite or montmorillonite, grind it to 40 mesh, and press the mass ratio of 1:2 and the concentration is 2mol / The alkaline solution of L was mixed, stirred at a speed of 100r / min, and the stirring time was 1h, then heated to 85°C and kept on ice for 12h, then cooled naturally to room temperature, and filtered through a 0.22μm pore size microfiltration membrane to obtain a transparent solution; The transparent solution i...

Embodiment 2

[0027] A composite carrier catalyst for olefin polymerization, mainly composed of the following components by weight: 6.5 parts of composite carrier, 1.1 parts of diethyl succinate, 0.125 parts of dimethoxypropane, 0.06 parts of aliphatic ketones, and 0.55 parts of phosphine sulfonate , 0.115 parts of naphthalene dicarboxylate; the composite carrier is a mixture of fine particle carrier and modified silica powder according to the mass ratio of 1.4:1.

[0028] Wherein, the preparation method of the fine particle carrier is: select the montmorillonite group such as hectorite, stevensite or montmorillonite, grind it to 60 mesh, and use a mass ratio of 1:6 and a concentration of 3.5mol / L of alkaline solution, stirred at a speed of 450r / min for 1.5h, then heated to 92.5°C for 21h on ice, then naturally cooled to room temperature, filtered through a 0.22μm pore size microfiltration membrane to obtain a transparent solution; Mix the transparent solution with a strong acid solution a...

Embodiment 3

[0034] A composite carrier catalyst for olefin polymerization, mainly composed of the following ingredients in parts by weight: 10 parts of composite carrier, 1.2 parts of diethyl succinate, 0.15 parts of dimethoxypropane, 0.1 part of aliphatic ketone, and 0.8 parts of phosphine sulfonate , 0.13 parts of naphthalene dicarboxylate; the composite carrier is a mixture of fine particle carrier and modified silica powder according to the mass ratio of 1.6:1.

[0035] Wherein, the preparation method of the fine particle carrier is: select the montmorillonite group such as hectorite, stevensite or montmorillonite, grind it to 80 mesh, and press the mass ratio of 1:10 and the concentration is 5mol / The alkaline solution of L was mixed, stirred at a speed of 800r / min for 2h, then heated to 100°C and kept on ice for 30h, then cooled naturally to room temperature, and filtered through a 0.22μm pore size microfiltration membrane to obtain a transparent solution; The transparent solution i...

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PUM

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Abstract

The invention discloses a composite support catalyst for olefin polymerization and a preparation method of the composite support catalyst for olefin polymerization. The composite support catalyst mainly comprises, by weight, 3-10 parts of composite support, 1-1.2 parts of diethyl succinate, 0.1-0.15 part of dimethoxy propane, 0.02-0.1 part of aliphatic ketone, 0.3-0.8 part of phosphono sulfonate and 0.1-0.13 part of naphthalene dicarboxylate, wherein the composite support is a mixture formed by fine-particle support and modified silicon dioxide powder according to the mass ratio of (1.2-1.6):1. The composite support catalyst has the advantages that the composite support catalyst is high in polymerization activity in the olefin polymerization, the bulk density of polymer can be increased on the premise that the high isotacticity of the polymer is kept, the polymer is allowed to keep a good particle form, and the fine powder of the polymer is reduced.

Description

technical field [0001] The invention relates to the technical field of chemical catalysts, in particular to a composite carrier catalyst for olefin polymerization and a preparation method thereof. Background technique [0002] Olefin polymerization catalysts can generally be divided into three categories: traditional Ziegler-Natta catalysts, metallocene catalysts and non-metallocene catalysts. For the traditional Ziegler-Natta catalyst for propylene polymerization, with the development of the electron donor compound in the catalyst, the polyolefin catalyst is also constantly updated. The development of catalysts has ranged from the first generation TiCl3AlCl3 / AlEt2Cl system and the second generation TiCl3 / AlEt2Cl system to the third generation using magnesium chloride as the carrier, monoester or aromatic dibasic acid ester as the internal electron donor, and silane as the external donor. The TiCl4·ED·MgCl2 / AlR3·ED system of the electron body and the newly developed catalys...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/00C08F4/02
CPCC08F10/00C08F4/02C08F4/025
Inventor 常爱荣
Owner 常爱荣