Catalyst for olefin polymerization and method for polymerization of olefin

A technology of olefin polymerization and catalyst, applied in the field of olefin polymerization, can solve problems such as long-term polymerization operation difficulties, insufficient polymerization activity, composition deviation, etc.

Inactive Publication Date: 2004-08-11
JAPAN POLYPROPYLENE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when these catalysts are used for olefin polymerization, the polymerization activity is insufficient, or the reactivity at the initial stage of polymerization (so-called initial activity) is low, and the fine powder particles that are easy to agglomerate and adhere in the polymerization reactor, that is, the low-activity particles increase and become stable. Obstacles to polymerization operation, or cause composition deviation of individual particles, generation of low-melting point particles, aggregation, adhesion growth, formation of adhered polymers on the inner wall of the polymerization reactor, the inner wall of the product extraction pipe, the pipe of the polymerization gas circulation system, etc. Or block polymer, long-term polymerization operation is difficult in industry

Method used

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  • Catalyst for olefin polymerization and method for polymerization of olefin
  • Catalyst for olefin polymerization and method for polymerization of olefin
  • Catalyst for olefin polymerization and method for polymerization of olefin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0207] (1) Acid treatment of clay minerals

[0208] Disperse 37 kg of commercially available granulated and graded swelling montmorillonite (Benclair SL, manufactured by Mizusawa Chemical Co., Ltd., with an average particle diameter of 27 μm) in 148 kg of 25% sulfuric acid, stir at 90° C. for 2 hours, and filter with desalted water ,washing.

[0209] (2) Titanium salt treatment and drying of clay minerals

[0210] In the commercially available titanium sulfate aqueous solution (Chemical Industry Co., Ltd.), containing TiO 2 7.5%, including SO 4 25.6%) in 236kg, the montmorillonite filter cake obtained in the above (1) through the sulfuric acid treatment was all dispersed, and stirred for 3 hours at 30°C. After filtering it with desalinated water and washing it to pH 3.5, the resulting water-containing solid filter cake was pre-dried at 110° C. for 10 hours to obtain titanium salt-treated montmorillonite. The particles passing through the 150 mesh sieve in the pre-dried mon...

Embodiment 2

[0218] In addition to using bis(1-n-butyl-3-methylcyclopentadienyl) zirconium dichloride (0.48mmol, that is, a solution of 0.2076g dispersed in n-heptane 69.2ml) as component [A2] and bis( n-Butylcyclopentadienyl) hafnium dichloride (1.92mmol is the solution of 0.9442g dispersed in n-heptane 314.7ml) as the component [A1], and the same method as in Example 1 (3) (4) to prepare the preliminary polymerization catalyst to obtain 79.2 g of preliminary polymerization catalyst powder. Using this preliminary polymerization catalyst powder, ethylene-1-hexene copolymerization was carried out in the same manner as in Example 1 (5). The polymerization results are shown in Table 1, and the product properties are shown in Table 2.

Embodiment 3

[0224]In addition to using bis(1,3-dimethylcyclopentadienyl)zirconium dichloride (1.20mmol, that is, a solution of 0.4181g dispersed in n-heptane 139.4ml) as component [A2] and bis(n-butylcyclopentadienyl) Dienyl) hafnium dichloride (1.20mmol is the solution that 0.5902g is dispersed in n-heptane 196.7ml) as component [A1], prepares the prepolymerization catalyst with the same method as embodiment 1 (3) (4), obtains Prepare 75.8 g of polymerization catalyst powder. Using this preliminary polymerization catalyst powder, ethylene-1-hexene copolymerization was carried out in the same manner as in Example 1 (5). The polymerization results are shown in Table 1, and the product properties are shown in Table 2.

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Abstract

The present invention provides a catalyst for olefin polymerization having high olefin polymerization activity without being accompanied by generation of an adhered polymer on the wall of a polymerization reactor and the wall of pipe line and generation of a locking massive polymer, and capable of manufacturing an olefin polymer industrially and stably for a long period of time. That is, the present invention related to a catalyst for olefin polymerization comprising [A1] a hafnium compound or a zirconium compound having at least one conjugated 5-membered ring ligand, [A2] a zirconium compound having at least one conjugated 5-membered ring ligand but different from [A1], and [B] phyllosilicate, and relates to a method of polymerizing or copolymerizing olefin in the presence of the catalyst.

Description

technical field [0001] The present invention relates to a catalyst for olefin polymerization and a method for olefin polymerization. More specifically, the present invention relates to a catalyst for polymerization having a specific high polymerization activity, and an olefin polymerization process capable of continuous operation for a long period of time on an industrial scale using the catalyst. Background technique [0002] In the production of olefin polymers by polymerizing olefins, a method using a catalyst composed of (1) a metallocene compound and (2) a layered silicate, etc. has been proposed (JP-A-5-301917, JP-A-8-127613, etc.) . [0003] Adopt the polymerization method of these catalyzers, compare with the method that so-called methylaluminum oxide is supported on the carrier such as silicon dioxide, aluminum oxide or organic matter in the past (patent open clear 60-35007, with 61-31404, Same as 61-108610, 61-276805, 61-296008, etc.), the polymerization activity...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F4/646C08F4/656C08F4/659C08F4/6592C08F10/00C08F210/16
CPCY10S526/943C08F4/65927C08F4/65912C08F210/16C08F4/65916C08F10/00C08F4/65925C08F4/65904C08F4/6492C08F210/14C08F2500/12C08F2500/18C08F210/08
Inventor 石浜由之菅野利彦
Owner JAPAN POLYPROPYLENE CORP
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