Solid catalyst component and catalyst system for olefin polymerization, and olefin polymerization method

A solid catalyst, olefin polymerization technology, applied in the field of olefin polymerization

Active Publication Date: 2019-07-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned various electron donors can only improve the performance of olefin polymerization catalysts in a certain aspect, but in the field of Ziegler-Natta type olefin polymerization catalysts, electron donors that can simultaneously improve catalyst activity, hydrogen modulation sensitivity and copolymerization performance are relatively low. Less reported

Method used

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  • Solid catalyst component and catalyst system for olefin polymerization, and olefin polymerization method
  • Solid catalyst component and catalyst system for olefin polymerization, and olefin polymerization method
  • Solid catalyst component and catalyst system for olefin polymerization, and olefin polymerization method

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Experimental program
Comparison scheme
Effect test

Embodiment approach

[0069] According to a preferred embodiment, the magnesium alkoxide compound is selected from Mg(OEt) 2 and / or Mg(OEt) a (OEHA) 2-a (1.5≤a<2).

[0070] Generally, the general formula of the titanium compound is Ti(OR) n x 4-n , where R is C 1 -C 8 Hydrocarbyl, preferably C 1 -C 8 Alkyl, X is a halogen atom, preferably fluorine, chlorine, bromine, 0≤n≤4. For example, the titanium compound may be selected from TiCl 4 、TiBr 4 、TiI 4 , Ti(OC 2 h 5 )Cl 3 , Ti(OCH 3 )Cl 3 , Ti(OC 4 h 9 ) Cl 3 , Ti(OC 2 h 5 )Br 3 , Ti(OC 2 h 5 ) 2 Cl 2 , Ti(OCH 3 ) 2 Cl 2 , Ti(OCH 3 ) 2 I 2 , Ti(OC 2 h 5 ) 3 Cl, Ti(OCH 3 ) 3 Cl, Ti(OC 2 h 5 ) 3 I, Ti(OC 2 h 5 ) 4 , Ti(OC 3 h 7 ) 4 and Ti(OC 4 h 9 ) 4 At least one of; preferably TiCl 4 , Ti(OC 2 h 5 )Cl 3 , Ti(OCH 3 )Cl 3 , Ti(OC 4 h 9 ) Cl 3 and Ti(OC 4 h 9 ) 4 At least one of, more preferably TiCl 4 .

[0071] Calculated per mole of magnesium, the titanium compound is used in an amount of ...

preparation example 1

[0107] Preparation Example 1 is used to illustrate the preparation method of the cyclotetraveratrol and its derivatives.

[0108] Preparation Example 1

[0109] 3,4-Dimethoxybenzyl alcohol (5g) / dichloromethane (20mL) mixed solution was added dropwise to trifluoroacetic acid (25mL) in dichloromethane (200mL) solution, after the addition was completed, continue to The reaction was carried out for 4 hours. The reaction was neutralized with sodium hydroxide solution, the organic phase was separated and completely sucked dry. The resulting product was washed several times with water and an organic solvent, and recrystallized in chloroform (80 mL) / benzene (30 mL) to obtain 2.5 g of compound A represented by formula (III). (Refer to Macromolecules1991, 24, 3227-3234)

[0110]

Embodiment 1

[0113] (1) Preparation of solid catalyst component

[0114] 10g Mg(OEt) 2 1. 55mL of toluene was added into the reaction kettle, and a suspension was formed under the condition of a stirring rate of 300rpm. The system was cooled down to 0°C, and 30mL of titanium tetrachloride and 0.2g of cycloveratrolene (compound A) were slowly added successively. After the addition was completed, the temperature was slowly raised to 90°C, and the temperature was kept constant for 1.5 hours. Stop stirring and let it stand, the suspension will be layered quickly, and the supernatant will be removed. Add 60 mL of toluene and 30 mL of titanium tetrachloride, raise the temperature to 90°C, and keep the temperature constant for 2 hours. Stop stirring, let it stand, and remove the supernatant. After repeated washing with toluene and hexane and drying, a solid catalyst component with good fluidity was obtained, and its composition is shown in Table 1.

[0115] (2) homopolymerization reaction

...

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Abstract

The invention belongs to the field of olefin polymerization catalysts, and particularly provides a solid catalyst component and catalyst system for olefin polymerization, and an olefin polymerizationmethod. The solid catalyst component comprises a reaction product of the following components: 1) an alkoxy magnesium compound; 2) a titanium compound; and 3) an internal electron donor compound, wherein the internal electron donor compound comprises at least one selected from cyclotetraveratrylene represented by a formula (I) and derivatives of the cyclotetraveratrylene. According to the solid catalyst component disclosed by the invention, polymerization activity, hydrogen regulation sensitivity and copolymerization performance of the polyolefin catalyst are improved by introducing the cyclotetraveratrylene and the derivative of the cyclotetraveratrylene as the internal electron donor.

Description

technical field [0001] The invention belongs to the field of olefin polymerization catalysts, and more specifically relates to a solid catalyst component for olefin polymerization, a catalyst system for olefin polymerization, and an olefin polymerization method. Background technique [0002] In the past 60 years, due to the continuous development of technology, the activity of Ziegler-Natta type olefin polymerization catalysts, hydrogen adjustment sensitivity, copolymerization performance and the bulk density, melt index, molecular weight distribution, fine powder content, copolymerization unit distribution and other parameters of the polymerization powder have been significantly optimized. However, in order to better adapt to the needs of industrial production and produce products with better performance, the above-mentioned parameters of this type of catalyst and its polymerization powder need to be further improved. [0003] In the prior art, the introduction of certain ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/00C08F110/02C08F210/16C08F4/649
CPCC08F4/6494C08F10/00C08F110/02C08F210/16
Inventor 黄庭孙竹芳郭子芳周俊领谢伦嘉苟清强杨红旭李颖曹昌文俸艳芸黄廷杰
Owner CHINA PETROLEUM & CHEM CORP
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