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Siza 1,3-diether compound and preparation method thereof, olefin polymerization catalyst and olefin polymerization method

A technology of olefin polymerization and compounds, applied in the field of olefin polymerization, can solve the problems of low melt index and low polymerization efficiency of polyolefins, achieve high catalytic activity, improve polymerization efficiency, and have a wide range of industrial application prospects

Active Publication Date: 2022-07-26
CHINA ENERGY GRP NINGXIA COAL IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to overcome the problems of low polymerization efficiency and low polyolefin melt index in the prior art, and provide sila 1,3-diether compound and its preparation method, olefin polymerization catalyst and olefin polymerization method

Method used

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  • Siza 1,3-diether compound and preparation method thereof, olefin polymerization catalyst and olefin polymerization method
  • Siza 1,3-diether compound and preparation method thereof, olefin polymerization catalyst and olefin polymerization method
  • Siza 1,3-diether compound and preparation method thereof, olefin polymerization catalyst and olefin polymerization method

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Experimental program
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preparation example Construction

[0089] In some embodiments of the present invention, preferably, the preparation method of the solid component comprises:

[0090] (1) dispersing the magnesium-containing compound in a dispersion medium to obtain a magnesium-containing dispersion medium;

[0091] (2) carrying out the fifth contact with the magnesium-containing dispersion medium and the first titanium-containing compound and the first internal electron donor compound to obtain a first dispersion liquid;

[0092] (3) carrying out the sixth contact with the second titanium-containing compound and the second internal electron donor compound to obtain the second dispersion liquid;

[0093] (4) Removing the dispersion medium in the second dispersion liquid to obtain the solid component.

[0094] In some embodiments of the present invention, the magnesium-containing compound is selected from at least one of magnesium chloride, magnesium bromide and magnesium iodide, more preferably magnesium chloride.

[0095] In s...

preparation example 1

[0133] Preparation Example 1 is used to prepare the sila-1,3-diether compound Z1 represented by formula I-1:

[0134]

[0135] (1) Preparation of Grignard reagent

[0136] Take a 500 ml three-necked flask with a magnetron, a spherical condenser and a constant pressure dropping funnel, add magnesium powder (28.8 g, 1.2 mol) and a little iodine under nitrogen protection; add ortho-bromine to the constant pressure dropping funnel Anisole (1.0 mol) and tetrahydrofuran (200 ml), then 5 ml of o-bromoanisole in tetrahydrofuran was added dropwise to the flask, stirred for 3-5 minutes to initiate the reaction; then o-bromoanisole was added dropwise tetrahydrofuran solution; after the dropwise addition is completed, heat under reflux for 1 hour to complete the preparation of Grignard reagent.

[0137] (2) Synthesis of Silane

[0138] Take a 2.5-liter three-necked flask with a magnetron and a spherical condenser, add diphenyldichlorosilane (253 g, 1.0 mol) and 500 mL of tetrahydrofu...

preparation example 2

[0140] Preparation Example 2 is used to prepare the sila 1,3-diether compound Z2 represented by formula I-2:

[0141]

[0142] According to the method of Preparation Example 1, the difference is that in step (2), an equivalent amount of diisopropyldichlorosilane is used instead of diphenyldichlorosilane, and the obtained product is determined to be formula I-2 by hydrogen nuclear magnetic resonance spectrum Compound Z2 shown (81 wt% yield).

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Abstract

The invention relates to the field of olefin polymerization, and discloses a sila 1,3-diether compound and a preparation method thereof, an olefin polymerization catalyst and an olefin polymerization method. The sila 1,3-diether compound has the structure shown in formula I: in formula I, R 1 and R 2 same or different, each independently C 1 ‑C 10 alkane, C 3 ‑C 12 cycloalkyl and C 6 ‑C 20 Any of the aryl groups; R 3 , R 4 , R 5 , R 5 and R 6 same or different, each independently hydrogen, halogen group, C 1 ‑C 10 alkane, C 3 ‑C 12 cycloalkyl and C 6 ‑C 20 Any of the aryl groups; R 7 and R 8 same or different, each independently C 1 ‑C 5 any of the alkane groups. The sila 1,3-diether compound of the present invention is used as an external electron donor of an olefin polymerization catalyst, and can prepare polyolefin with high melt index with higher catalytic activity, thereby effectively improving the polymerization efficiency, and has a wide range of Prospects for industrial applications.

Description

technical field [0001] The invention relates to the field of olefin polymerization, in particular to a sila 1,3-diether compound and a preparation method thereof, an olefin polymerization catalyst and an olefin polymerization method. Background technique [0002] Polypropylene is cost-effective and widely used. Polypropylene can be used in injection molding, extrusion, blow molding and other production processes. In injection molding and extrusion processes, in order to improve processing efficiency and prepare large injection molded parts, it is usually necessary to increase the melt index of polypropylene to meet processing requirements. In general, MgCl is used for propylene polymerization 2 The supported Ziegler-Natta catalyst (Z-N catalyst) is prepared. Hydrogen is added as a molecular weight regulator during propylene polymerization. Hydrogen can reduce the molecular weight of polypropylene and increase the melt index of polypropylene. However, when the amount of hydr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F7/18C08F4/626C08F10/00C08F110/06
CPCC07F7/1804C07F7/1876C08F4/6265C08F10/00C08F110/06C08F2500/12C08F2500/15
Inventor 焦洪桥李化毅李刚健李倩袁炜罗志张玉柱李彦鹏王林乃国星姚强张彤辉张利军王立凯蒋生祥黄河张彩霞胡琳曾祥国王健王伟李丽英王齐
Owner CHINA ENERGY GRP NINGXIA COAL IND CO LTD
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