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Z-N catalyst, preparation method and applications thereof

A catalyst, Z-N technology, applied in the field of Ziegler-Natta catalysts, can solve the problems of poor activity and isotacticity

Active Publication Date: 2019-08-09
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When this type of cyanosuccinate compound is used for olefin polymerization, it has good hydrogen modulation sensitivity and can obtain polymers with medium molecular weight distribution, but its activity and isotacticity are poor

Method used

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  • Z-N catalyst, preparation method and applications thereof
  • Z-N catalyst, preparation method and applications thereof
  • Z-N catalyst, preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Preparation of the main catalyst: under anhydrous and oxygen-free conditions, the alcoholate particles of 5.0 grams of microspherical magnesium chloride (self-made, the preparation steps refer to CN1110281A, the average particle size is 50 μm, and the specific surface is 150-230m 2 / g, the molar ratio of alcohol to magnesium chloride content is 2.85:1, molecular formula: MgCl 2 ·2.85CH 3 CH 2 OH) was added to 140ml of titanium tetrachloride liquid at -20°C, and after reacting for 1 hour, the temperature was gradually raised to 60°C; 1.03 g of 3,5-pyridine-(N,N'-di-n-butyl)diamide was added, Gradually raise the temperature to 120°C, react for 2 hours, and filter; then add 140ml of titanium tetrachloride, react at 120°C for 1 hour, and filter. Wash 5 times with 100ml hexane at 60°C, wash once with 30ml hexane at room temperature, and dry in vacuo to obtain the main catalyst.

[0045] The content of each component in the main catalyst is shown in Table 1.

[0046] Bulk...

Embodiment 2

[0049] Preparation of the main catalyst: under anhydrous and oxygen-free conditions, the alcoholate particles of 5.0 grams of microspherical magnesium chloride (self-made, the preparation steps refer to CN1110281A, the average particle size is 50 μm, and the specific surface is 150-230m 2 / g, the molar ratio of alcohol to magnesium chloride content is 2.85:1, molecular formula: MgCl 2 ·2.85CH 3 CH 2 OH) was added to 140ml of titanium tetrachloride liquid at -20°C, and after reacting for 1 hour, the temperature was gradually raised to 60°C; 1.03 g of 3,5-pyridine-(N,N'-di-n-butyl)diamide was added, Gradually raise the temperature to 120°C, react for 2 hours, and filter; then add 140ml of titanium tetrachloride, react at 120°C for 1 hour, and filter. Wash 5 times with 100ml hexane at 60°C, wash once with 30ml hexane at room temperature, and dry in vacuo to obtain the main catalyst.

[0050] The content of each component in the main catalyst is shown in Table 1.

[0051] Bulk...

Embodiment 3

[0054] Preparation of the main catalyst: under anhydrous and oxygen-free conditions, the alcoholate particles of 5.0 grams of microspherical magnesium chloride (self-made, the preparation steps refer to CN1110281A, the average particle size is 50 μm, and the specific surface is 150-230m 2 / g, the molar ratio of alcohol to magnesium chloride content is 2.85:1, molecular formula: MgCl 2 ·2.85CH 3 CH 2 OH) was added to 140ml of titanium tetrachloride liquid at -20°C, and after reacting for 1 hour, the temperature was gradually raised to 60°C; 1.03 g of 3,5-pyridine-(N,N'-di-n-butyl)diamide was added, Gradually raise the temperature to 120°C, react for 2 hours, and filter; then add 140ml of titanium tetrachloride, react at 120°C for 1 hour, and filter. Wash 5 times with 100ml hexane at 60°C, wash once with 30ml hexane at room temperature, and dry in vacuo to obtain the main catalyst.

[0055] The content of each component in the main catalyst is shown in Table 1.

[0056] Bulk...

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Abstract

The invention discloses a Z-N catalyst, which at least comprises an electron donor compound represented by a formula (I) and having a molecular skeleton 3,5-pyridinediformamide, wherein in the formula(I), the substituents R1-R6 are the same or different, and are selected from H, C1-C20 linear or branched alkyl, C3-C20 cycloalkyl, C6-C20 aryl or C7-C20 alkaryl, and alkoxyaryl. According to the present invention, the catalyst has good hydrogen sensitivity while achieves the broad molecular weight distribution polymer, and is particularly suitable for propylene polymerization. The invention further discloses a preparation method of the catalyst, and applications in polymerization of propylene.

Description

technical field [0001] The invention relates to a Ziegler-Natta catalyst, a preparation method of the catalyst, and an application of the catalyst in propylene polymerization. Background technique [0002] Due to its excellent comprehensive performance and easy processing and molding, polypropylene (PP) has grown rapidly in domestic production and consumption in recent years. With the development of the domestic PP industry, manufacturers are also striving to develop new grades of special resins with high added value while paying attention to the quality management of general-purpose grades. Wide molecular weight distribution PP has the characteristics of comprehensive physical properties and processing properties, and has been widely used in many fields such as biaxially oriented polypropylene (BOPP), random copolymerized polypropylene (PPR), high melt strength PP, etc., based on New grades of special resins developed by wide molecular weight distribution polypropylene are...

Claims

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Application Information

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IPC IPC(8): C08F4/646C08F4/649C08F4/651C08F2/02C08F10/06C08F110/06
CPCC08F10/06C08F110/06C08F4/6495C08F4/6465C08F4/651C08F2/02
Inventor 王霞宋赛楠刘强慕雪梅邓守军刘小燕徐人威董万卓张平生张文学张翠玲黄春波孟霞
Owner PETROCHINA CO LTD
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