Mono-active center Ziegler-Natta catalyst for olefinic polymerization

A single-site, olefin polymerization technology, applied in the field of new single-site Ziegler-Natta olefin polymerization catalysts, can solve problems such as synthesis difficulties, development and application limitations, and a large number of cocatalysts

Active Publication Date: 2006-12-27
SHANGHAI INST OF ORGANIC CHEMISTRY - CHINESE ACAD OF SCI
View PDF13 Cites 190 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the patent US 5459116 reports a method for preparing a titanium-containing solid catalyst by reacting a magnesium solution containing an ester (having at least one hydroxyl group as an electron donor) with a titanium compound. The catalyst has high catalytic activity, but the molecular weight distribution of the polymer Width (PDI is 7.38~10.04)
Chinese patent CN1510055A reports the support type Ziegler-Natta ethylene polymerization catalyst prepared as electron donor with a small amount of alcohol, only one example provides the molecular weight distribution data of polyethylene, PDI

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
  • Mono-active center Ziegler-Natta catalyst for olefinic polymerization
  • Mono-active center Ziegler-Natta catalyst for olefinic polymerization
  • Mono-active center Ziegler-Natta catalyst for olefinic polymerization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] The preparation of embodiment 1 catalyst 1:

[0061] The electron donor is:

[0062]

[0063] (1) Heat treatment of the carrier

[0064] Take ES70 type silica gel (product of Ineos Company) and bake it under nitrogen atmosphere. The calcination conditions are: treat at 200°C for 2h, then raise the temperature to 400°C for 4h, and cool naturally under nitrogen atmosphere. Denoted as ES70 vector.

[0065] (2) Preparation of Catalyst 1

[0066] Add 1.0g of anhydrous magnesium chloride to 40mL of tetrahydrofuran (hereinafter referred to as THF), stir at 60°C for 2h; add dropwise 3.4mmol of TiCl4 , reacted at 60°C for 4h, then added 1.0g of ES70 carrier after heat treatment, reacted at 60°C for 4h; finally added 4.0mmol of electron donor L1 prepared above, reacted at 60°C for 12h. After the reaction, the solvent was evaporated under reduced pressure, and the product was washed with hexane (3×20 mL), and then dried under reduced pressure to obtain ...

Embodiment 2

[0067] The preparation of embodiment 2 catalyst 2:

[0068] Add 1.0g of anhydrous magnesium chloride to 40mL of tetrahydrofuran (hereinafter referred to as THF), stir at 60°C for 2h; add 15mmol of TiCl dropwise 4 , reacted at 60°C for 4h, then added 1.0g of ES70 carrier after heat treatment, reacted at 60°C for 4h; finally added 4.0mmol of electron donor L1 prepared above, reacted at 60°C for 12h. After the reaction, the solvent was evaporated under reduced pressure, and the product was washed with hexane (3×20 mL), and then dried under reduced pressure to obtain catalyst 2. Ti content: 5.23wt-%

Embodiment 3

[0069] The preparation of embodiment 3 catalyst 3:

[0070] Add 1.0g of anhydrous magnesium chloride to 40mL of tetrahydrofuran (hereinafter referred to as THF), stir at 60°C for 2h; add dropwise 3.4mmol of TiCl 4 , reacted at 60°C for 4h, then added 1.0g of the heat-treated ES757 carrier, reacted at 60°C for 4h; finally added 10mmol of the electron donor L1 prepared above, and reacted at 60°C for 12h. After the reaction, the solvent was evaporated under reduced pressure, and the product was washed with hexane (3×20 mL), and then dried under reduced pressure to obtain catalyst 3. Ti content: 2.60wt-%

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

No PUM Login to view more

Abstract

The invention relates to a new catalyst for single active central Ziegler-Natta alkene polymerization. Said catalyst takes salicylal containing dentate or substituted salicylal derivatives as electrons, and is prepared by adding pretreated carrier, metallic compound and electrons into magnesium compound/ tetrahydrofuran solution. The catalyst can produce ethane homopolymer and copolymer with narrow molecular weight distribution (1.6-3.8) and even comonomer distribution, with high activity and under action of adjuvant catalyst of alkyl aluminium and alkyl aluminoxanes. The ethane polymerization, homopolymerization or combined polymerization of ethane and 1- olefin, ring olefin and polar monomer through slurry method or gas phase method by using said catalyst can be realized.

Description

technical field [0001] The invention relates to a new type of single active center Ziegler-Natta (Ziegler-Natta) olefin polymerization catalyst. The catalyst uses salicylaldehyde or a substituted salicylaldehyde derivative containing a coordination group as an organic electron donor. Under the action of a co-catalyst, the catalyst can be used to catalyze the homopolymerization of ethylene or the copolymerization of ethylene and alpha-olefin to obtain a structure-controllable ethylene polymer. Background technique [0002] With the rapid development of the polyolefin industry, the production of high-performance polyolefin materials has attracted more and more attention. At present, international research believes that the production of high-performance polyolefin materials can be realized in two ways: 1) using Ziegler-Natta catalysts, relying on the improvement of chemical processes; 2) using new single-site catalysts including metallocene catalysts and Non-generic catalyst...

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
IPC IPC(8): C08F10/02C08F4/645
Inventor 唐勇孙秀丽刘博马志王聪高原杨小红
Owner SHANGHAI INST OF ORGANIC CHEMISTRY - CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap