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Loading type bifunctional calulyst system and its preparation method and application

A dual-functional catalysis and catalytic system technology, applied to the application of the above-mentioned catalytic system in the preparation of linear low-density polyethylene, the preparation of montmorillonite-supported oligomerization catalyst and silica-supported copolymerization catalyst, the preparation field of the above-mentioned catalytic system , can solve the problems of unstable ethylene oligomerization catalyst and the formation of copolymers, etc., and achieve the effects of suppressing the phenomenon of sticking, high apparent density and high catalytic activity

Inactive Publication Date: 2006-08-23
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But, the weak point of this method is that the ethylene oligomerization catalyst used is unstable, and the α-olefin selectivity is only 40-90%, and its oligomerization product is 1-alkene, 2-alkyl-1-alkene and 2-Alkenes, of which 2-alkyl-1-alkenes and 2-alkenes cannot form copolymers with ethylene

Method used

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  • Loading type bifunctional calulyst system and its preparation method and application
  • Loading type bifunctional calulyst system and its preparation method and application
  • Loading type bifunctional calulyst system and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1. All operations are carried out under anhydrous and oxygen-free conditions, and the solvents used need to be dehydrated and deoxidized.

[0034] 2. Catalytic system

[0035] (a) Preparation of montmorillonite-supported oligomerization catalyst

[0036] Dry the montmorillonite in vacuum at 60°C for 8 hours, add 1.8mol / L methylalumoxane solution (the weight ratio of methylalumoxane solution to montmorillonite is 6:1) and stir at 60°C After 8 hours, the unreacted methylaluminoxane was washed three times with toluene, filtered, and dried to obtain a montmorillonite carrier. Weigh 4 grams of the above-mentioned montmorillonite, add 30 milliliters of toluene and 0.1 g {[(2-ArN=C(Me)) 2 C 5 h 3 N]FeCl 2}(Ar=2,4-C 6 h 4 (Me) 2 ) solution was reacted at 50°C for 12 hours; unloaded {[(2-ArN=C(Me)) was washed away with toluene 2 C 5 h 3 N]FeCl 2}(Ar=2,4-C 6 h 4 (Me) 2 ); vacuumize the toluene solvent therein, and vacuum-dry at 60° C. for 8 hours to obtain a montmo...

Embodiment 2

[0042] 1. All operations are carried out under anhydrous and oxygen-free conditions, and the solvents used need to be dehydrated and deoxidized.

[0043] 2. Catalytic system

[0044] (a) Preparation of montmorillonite-supported oligomerization catalyst

[0045] Dry the montmorillonite in vacuum at 60°C for 8 hours, add 1.8mol / L methylalumoxane solution (the weight ratio of methylalumoxane solution to montmorillonite is 6:1) and stir at 60°C After 8 hours, the unreacted methylaluminoxane was washed three times with toluene, filtered, and dried to obtain a montmorillonite carrier. Weigh 4 grams of the above montmorillonite, add 30 milliliters of toluene and 0.08 g {[(2-ArN=C(Me)) 2 C 5 h 3 N]FeCl 2}(Ar=2,4-C 6 h 4 (OMe) 2 ) solution was reacted at 50°C for 12 hours; unloaded {[(2-ArN=C(Me)) was washed away with toluene 2 C 5 h 3 N]FeCl 2}(Ar=2,4-C 6 h 4 (OMe) 2 ); vacuumize the toluene solvent therein, and vacuum-dry at 60° C. for 8 hours to obtain a montmorilloni...

Embodiment 3

[0050] 1. All operations are carried out under anhydrous and oxygen-free conditions, and the solvents used need to be dehydrated and deoxidized.

[0051] 2. Catalytic system

[0052] (a) Preparation of montmorillonite-supported oligomerization catalyst

[0053] Dry the montmorillonite in vacuum at 60°C for 8 hours, add 1.8mol / L methylalumoxane solution (the weight ratio of methylalumoxane solution to montmorillonite is 6:1) and stir at 60°C After 8 hours, the unreacted methylaluminoxane was washed three times with toluene, filtered, and dried to obtain a montmorillonite carrier. Weigh 4 grams of the above-mentioned montmorillonite, add 30 milliliters of toluene and 0.4 g of {[(2-ArN=C(Me)) 2C 5 h 3 N]FeCl 2}(Ar=2,4-C 6 h 4 (Me) 2 ) solution was reacted at 50°C for 12 hours; the unloaded {[(2-ArN=C(Me))2C was washed away with toluene 5 h 3 N]FeCl 2}(Ar=2,4-C 6 h 4 (OMe) 2 ); vacuumize the toluene solvent therein, and vacuum-dry at 60° C. for 8 hours to obtain a mon...

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Abstract

A carried dual-function catalyst system for preparing polyethene from ethene features that its oligomerizing catalyst is composed of laminated inorganic material (carrier) and transition metal matches, its copolymerizing catalyst is composed of SiO2 (carrier) and metalloene matches and the alkylaluminium is its cocatalyst. Its preparing process includes preparing montmorillonite and SiO2 carries, and respectively carrying oligomerizing catalyst and copolymerizing catalyst.

Description

technical field [0001] The invention relates to a loaded bifunctional catalytic system. [0002] The present invention also relates to the preparation method of the above-mentioned catalytic system, in particular to the preparation method of the montmorillonite-supported oligomerization catalyst and the silica-supported copolymerization catalyst in the catalytic system. [0003] The present invention also relates to the application of the above catalyst system in the preparation of linear low density polyethylene. Background technique [0004] Copolymerization of ethylene and α-olefins with metallocene catalysts to prepare linear low-density polyethylene (LLDPE) has been a research hotspot in recent years. The required α-olefins are usually produced by ethylene oligomerization, and then separated by rectification to obtain hexene, Octene, Decene, etc. If a dual-functional catalyst system can be used to oligomerize ethylene into α-olefins through an oligomerization catalyst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F4/80C08F4/603C08F4/02C08F10/02
Inventor 胡友良张志成郭存悦王如义
Owner INST OF CHEM CHINESE ACAD OF SCI
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