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z-n catalyst, preparation method of catalyst and application 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: 2021-08-31
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 of catalyst and application thereof
  • z-n catalyst, preparation method of catalyst and application thereof
  • z-n catalyst, preparation method of catalyst and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Preparation of procatalyst: under anhydrous oxygen-free conditions, 5.0 g of magnesium chloride alcoholate microspheroidal particles (made, with reference to production step CN1110281A, an average particle size of 50 m, a specific surface area of ​​150-230m 2 / G, a molar ratio of alcohol to magnesium chloride content is 2.85: 1, the formula: MgCI2 2 · 2.85CH 3 CH 2 OH) was added to a 140ml -20 ℃ liquid titanium tetrachloride, the reaction for 1 hour and gradually warmed to 60 deg.] C; pyridine was added 1.03 g of 3,5 - (N, N'- di-n-butyl) amide, gradually heated to 120 deg.] C, reacted for 2 hours, filtered; and then 140 ml of titanium tetrachloride was added, the reaction for 1 hour at 120 deg.] C and filtered. With 100ml of hexane washed five times at 60 deg.] C, at room temperature, washed once with 30ml of hexane, and dried in vacuo to give the procatalyst.

[0045] Procatalyst content of each component in Table 1.

[0046] Bulk polymerization: In a 10 liter vacuum dri...

Embodiment 2

[0049] Preparation of procatalyst: under anhydrous oxygen-free conditions, 5.0 g of magnesium chloride alcoholate microspheroidal particles (made, with reference to production step CN1110281A, an average particle size of 50 m, a specific surface area of ​​150-230m 2 / G, a molar ratio of alcohol to magnesium chloride content is 2.85: 1, the formula: MgCI2 2 · 2.85CH 3 CH 2 OH) was added to a 140ml -20 ℃ liquid titanium tetrachloride, the reaction for 1 hour and gradually warmed to 60 deg.] C; pyridine was added 1.03 g of 3,5 - (N, N'- di-n-butyl) amide, gradually heated to 120 deg.] C, reacted for 2 hours, filtered; and then 140 ml of titanium tetrachloride was added, the reaction for 1 hour at 120 deg.] C and filtered. With 100ml of hexane washed five times at 60 deg.] C, at room temperature, washed once with 30ml of hexane, and dried in vacuo to give the procatalyst.

[0050] Procatalyst content of each component in Table 1.

[0051] Bulk polymerization: In a 10 liter vacuum dri...

Embodiment 3

[0054] Preparation of procatalyst: under anhydrous oxygen-free conditions, 5.0 g of magnesium chloride alcoholate microspheroidal particles (made, with reference to production step CN1110281A, an average particle size of 50 m, a specific surface area of ​​150-230m 2 / G, a molar ratio of alcohol to magnesium chloride content is 2.85: 1, the formula: MgCI2 2 · 2.85CH 3 CH 2 OH) was added to a 140ml -20 ℃ liquid titanium tetrachloride, the reaction for 1 hour and gradually warmed to 60 deg.] C; pyridine was added 1.03 g of 3,5 - (N, N'- di-n-butyl) amide, gradually heated to 120 deg.] C, reacted for 2 hours, filtered; and then 140 ml of titanium tetrachloride was added, the reaction for 1 hour at 120 deg.] C and filtered. With 100ml of hexane washed five times at 60 deg.] C, at room temperature, washed once with 30ml of hexane, and dried in vacuo to give the procatalyst.

[0055] Procatalyst content of each component in Table 1.

[0056] Bulk polymerization: In a 10 liter vacuum dri...

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Abstract

The invention discloses a Z-N catalyst, which adopts at least one electron donor compound whose molecular skeleton is 3,5-pyridinedicarboxamide in the formula (I): in the formula (I), the substituent R 1 ~R 6 Same or different, selected from H, C 1 ~C 20 Straight chain or branched chain alkyl, C 3 ~C 20 Cycloalkyl, C 6 ~C 20 Aryl or C 7 ~C 20 alkaryl and alkoxyaryl groups. The catalyst has better hydrogen adjustment sensitivity while obtaining polymers with a wide molecular weight distribution, and is especially suitable for propylene polymerization. The invention further discloses a preparation method of the catalyst and its application in propylene polymerization.

Description

Technical field [0001] The present invention relates to a method of preparing a Ziegler-Natta catalyst, a catalyst, and a use of a catalyst in propylene polymerization. Background technique [0002] Polypropylene (PP) is excellent in overall performance, processing molding, in recent years, has grown in China. With the development of domestic PP industries, producers pay attention to the quality management of universal grades, and also strive to develop high value-added special resins. The wide molecular weight distribution PP has a better physical performance and a comprehensive comprehensive comprehensive comprehensive, and has been widely used in two-way tensile polypropylene (BOPP), random copolypropylene (PPR), high melt strength PP, etc. The new number of newly distributed polypropylene developed special resins has also emerged. [0003] In industrial production, most of the polypropylene distribution of polypropylene is mostly used in the pseudo-polymer distribution. The p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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