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Carrier bifunction catalyst and its preparation method and application

A dual-functional catalyst, catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, organic compound/hydride/coordination complex catalysts, etc., can solve the problem of unstable ethylene oligomerization catalyst, catalyst α-olefin Problems such as poor selectivity, to achieve the effect of good product shape, low crystallinity and low melting point

Inactive Publication Date: 2005-06-29
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

However, its biggest disadvantage is that the ethylene oligomerization catalyst it adopts is unstable and the α-olefin selectivity of the catalyst is poor, only 40-90%, and its oligomerization product is 1-alkene, 2-alkyl-1-chain Alkenes and 2-alkenes, of which 2-alkyl-1-alkenes and 2-alkenes cannot form copolymerization products with ethylene

Method used

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  • Carrier bifunction catalyst and its preparation method and application
  • Carrier bifunction catalyst and its preparation method and application
  • Carrier bifunction catalyst and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1. All operations are carried out under anhydrous and oxygen-free conditions, and the solvents used need to be dehydrated and deoxidized.

[0024] 2. SiO 2 Supported bifunctional catalyst system

[0025] (1) SiO 2 Preparation of Supported Bifunctional Catalyst

[0026] A: Oligomerization catalyst

[0027]

[0028] B: Copolymerization catalyst Et(Ind) 2 ZrCl 2

[0029] 1gSiO 2 Baking at 400°C for 6 hours, followed by vacuum treatment at 200°C for 2 hours. Cool to 30°C, add 10mL MAO (1.4mol / L toluene solution) and 10mL toluene, and react at 50°C for 12 hours. Wash with toluene, vacuum dry, and store under inert gas for future use. will be 80×10 -6 mol oligomerization catalyst A and 99×10 -6mol copolymerization catalyst B was added to the above system, and then 50 mL of toluene was added, and stirred at 60° C. for 12 hours. Wash with toluene until the supernatant becomes colorless, then vacuum-dry to obtain a supported bifunctional catalyst, which is stored ...

Embodiment 2

[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. Montmorillonite supported bifunctional catalyst system

[0035] (1) Preparation of montmorillonite-supported bifunctional catalyst

[0036] A: Oligomerization catalyst

[0037]

[0038] B: Copolymerization catalyst Et(Ind) 2 ZrCl 2

[0039] 1 g of montmorillonite was calcined at 300°C for 6 hours, and then treated under vacuum at 150°C for 2 hours. After cooling to 30°C, 20 mL of toluene was added to react at 50°C for 12 hours, washed with toluene several times, and then treated under vacuum at 200°C for 2 hours. Cool to 30°C, add 10mL MAO (1.4mol / L toluene solution) and 10mL toluene, and react at 50°C for 12 hours. Wash with toluene, vacuum dry, and store under inert gas for future use. will be 80×10 -6 mol oligomerization catalyst A and 105×10 -6 mol copolymerization catalyst B was added to the above system, ...

Embodiment 3

[0043] 1. All operations are carried out under anhydrous and oxygen-free conditions, and the solvents used need to be dehydrated and deoxidized.

[0044] 2. SiO 2 Supported bifunctional catalyst system

[0045] (1) SiO 2 Preparation of Supported Bifunctional Catalyst

[0046] A: Oligomerization catalyst

[0047]

[0048] B: Copolymerization catalyst Et(Ind) 2 ZrCl 2

[0049] 1gSiO 2 Baking at 400°C for 6 hours, followed by vacuum treatment at 200°C for 2 hours. Cool to 30°C, add 10mL of MAO (1.4mol / L toluene solution) and 10mL of toluene, and react at 70°C for 12 hours. Wash with toluene, vacuum dry, and store under inert gas for future use. will be 80×10 -6 mol oligomerization catalyst A and 102×10 -6 mol copolymerization catalyst B was added to the above system, and then 20 mL of toluene was added, and stirred at 60° C. for 12 hours. Wash with toluene until the supernatant becomes colorless, then vacuum-dry to obtain a supported bifunctional catalyst, which is...

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Abstract

A dual-function carried catalyst used for preparing the low-desity linear polyethylene and its preparing process are disclosed. It is composed of the high-activity and high-selectivity alpha-diimine pyridineiron matches as oligomerizing catalyst, the metallocene match as copolymerizing catalyst, and inorganic or organic carrier. Its advantages are high catalytic activity, good form of product and low cost.

Description

technical field [0001] The invention relates to a supported bifunctional catalyst, its preparation method and its application in the preparation of linear low-density polyethylene. Background technique [0002] Copolymerization of ethylene and α-olefins to prepare LLDPE with metallocene catalysts or constrained geometry catalysts 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, octane ene, decene, etc. If a dual-functional catalyst system can be used to oligomerize ethylene into α-olefins through an oligomerization catalyst in the reaction system, and at the same time under the action of a copolymerization catalyst, ethylene and α-olefins can be in-situ copolymerized to form LLDPE, which will simplify the production process. , greatly reducing production costs. J. Polym. Sci, Polym. Chem. Ed. 22, 3027 (1984); 24, 1069 (1986); Petrochemical, 23.491 (199...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/22C07C2/08C08F4/80C08F10/02
CPCY02P20/52
Inventor 张明革胡友良马志郭存悦
Owner INST OF CHEM CHINESE ACAD OF SCI
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