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

A kind of olefin polymerization catalyst and its preparation method and application

An olefin polymerization and catalyst technology, which is applied in the field of preparation of multi-active center catalysts, can solve the problems of low catalytic activity, high preparation cost, complicated preparation process, etc., and achieve the effect of stable reaction efficiency

Active Publication Date: 2017-01-11
SHANGHAI RES INST OF CHEM IND +1
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The bimetallic catalyst is used in conjunction with a co-catalyst for ethylene polymerization, and the polyethylene produced has a wide molecular weight distribution between 7-20, but the catalytic activity of this catalyst is low, only 400-1000g PE / g CAT, due to the use of relatively complex organic precursors, the preparation process is complicated and the preparation cost is high

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
  • A kind of olefin polymerization catalyst and its preparation method and application
  • A kind of olefin polymerization catalyst and its preparation method and application
  • A kind of olefin polymerization catalyst and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Catalyst preparation

[0057] (1) Under the protection of anhydrous and oxygen-free nitrogen, add 100ml of hexane into a 250ml four-necked flask, then add hexane solvent containing 0.5g of dibutylmagnesium to it, and keep stirring all the time, add 0.67g Ethanol, heated to 70°C, reacted for 1 hour, then added 1.09 g of ethyl benzoate, reacted for 1 hour, then added 0.41 g of titanium tetrachloride, reacted for 2 hours, then added 4.35 g of silicon dioxide, reacted for 2 hours, and obtained Suspension a.

[0058] (2) Under the protection of anhydrous and oxygen-free nitrogen, add 100ml of hexane into a 250ml four-necked flask, then add hexane solvent containing 0.5g of dibutylmagnesium to it, and keep stirring all the time, add 0.67g Ethanol, heated to 70°C, reacted for 1 hour, then added 1.09 g of ethyl benzoate, reacted for 1 hour, then added 0.28 g of vanadium tetrachloride, reacted for 2 hours, then added 4.35 g of silicon dioxide, reacted for 2 hours, and obtained ...

Embodiment 2

[0064] The preparation of the catalyst is the same as in Example 1; in the polymerization evaluation conditions, the polymerization temperature is 60° C., and other conditions are the same as in Example 1.

[0065] 0.0548 g of catalyst was actually added to obtain 319 g of polyethylene, and the catalytic efficiency was 5821 g PE / g Cat. The density of the polymer is 0.9541g / cm 3 , the melt index is 12.48 (21.6kg / 10min)

Embodiment 3

[0067] The preparation of the catalyst is the same as in Example 1; in the polymerization evaluation conditions, the polymerization temperature is 70° C., and other conditions are the same as in Example 1.

[0068] 0.0537g of catalyst was actually added to obtain 321g of polyethylene, and the catalytic efficiency was 5977g PE / g Cat. The density of the polymer is 0.9550g / cm 3 , the melt index is 15.84 (21.6kg / 10min)

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
densityaaaaaaaaaa
densityaaaaaaaaaa
densityaaaaaaaaaa
Login to View More

Abstract

The invention relates to an olefin polymerization catalyst as well as a preparation method and application thereof. The olefin polymerization catalyst consists of a main catalyst component and a cocatalyst, wherein the main catalyst component is prepared by the following method: (1) reacting an organic magnesium compound with a hydroxyl group-containing compound in a carrier dispersant, adding a compound containing lone pair electrons for sufficient reaction, and then adding a titanium-containing compound and an inert carrier to obtain a suspension a; (2) reacting the organic magnesium compound with the hydroxyl group-containing compound in the carrier dispersant, adding the compound containing lone pair electrons for sufficient reaction, and then adding a vanadium-containing compound and the inert carrier to obtain a suspension b; (3) mixing the suspension a and the suspension b, adding an active center valence state regulator, and then drying through distillation to obtain the main catalyst component; the cocatalyst is at least one organic aluminum compound with the general formula of AlR5xCl3-x. Compared with the prior art, the olefin polymerization catalyst has the advantages of steady reaction efficiency within a relatively wide reaction temperature range, and the like.

Description

technical field [0001] The invention relates to a catalyst, in particular to a method for preparing a multi-active center catalyst for olefin polymerization. The catalyst can maintain a stable and uniform polymerization efficiency in the range of 50-90°C, and the polymer can be made The molecular weight distribution is greatly broadened. Background technique [0002] The molecular weight and molecular weight distribution of polyethylene have an important influence on the rheological properties of its melt and the mechanical properties of its products. Wide molecular weight distribution polyethylene is one of the important development fields of polyethylene technology in recent years. Unlike ordinary polyethylene materials, wide molecular weight distribution polyethylene can not only maintain the mechanical properties, hardness and environmental stress cracking resistance of high molecular weight polyethylene, Moreover, it can improve the processing performance of polyethyle...

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 Patents(China)
IPC IPC(8): C08F110/02C08F210/16C08F4/685C08F4/646
Inventor 郭宇李阳阳肖明威叶晓峰郭宁
Owner SHANGHAI RES INST OF CHEM IND
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