Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Carrier bifunction catalyst and its preparation method and application

A dual-function 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: 2004-05-05
INST OF CHEM CHINESE ACAD OF SCI
View PDF0 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • 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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
melting pointaaaaaaaaaa
densityaaaaaaaaaa
Login to View More

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] The preparation of LLDPE by copolymerizing ethylene and α-olefins using metallocene catalysts or restricted geometry catalysts has been a research hotspot in recent years. The required α-olefins are usually generated by the oligomerization of ethylene, and then distilled and separated to obtain hexene and octene. Alkene, decene, etc. If a bifunctional 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 the copolymerization catalyst, ethylene and α-olefins can be copolymerized in situ to form LLDPE, the production process will be simplified. , greatly reducing production costs. J. Polym. Sci, Polym. Chem. Ed. 22, 3027 (1984); 24, 1069 (1986); Petrochem...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com