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

Loaded type metallocene catalyst for vinyl polymerization and preparation method thereof

A metallocene catalyst and ethylene polymerization technology, applied in the production of bulk chemicals, etc., can solve the problems of unsatisfactory regulation of catalyst particle shape and particle size distribution, poor polymer particle shape, and inability to meet the needs of industrialization, etc., to achieve easy polymerization process Controlled, controllable shape, beneficial to large-scale application

Active Publication Date: 2019-02-12
吉化集团吉林市天龙催化剂有限公司
View PDF13 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The first object of the present invention is to provide a supported metallocene catalyst for ethylene polymerization, to solve the technical problems of unsatisfactory control of the particle shape and particle size distribution of the existing catalyst, and the poor shape of the produced polymer particles, which cannot meet the needs of industrialization

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
  • Loaded type metallocene catalyst for vinyl polymerization and preparation method thereof
  • Loaded type metallocene catalyst for vinyl polymerization and preparation method thereof
  • Loaded type metallocene catalyst for vinyl polymerization and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0045] A preparation method for a supported metallocene catalyst for ethylene polymerization, specifically comprising the steps of:

[0046] ①Supercritical carbon dioxide assisted loading: add an aromatic hydrocarbon solution of metallocene compound to the polymer carrier, place it in a high-pressure reactor, pass in carbon dioxide, raise the temperature and pressurize until the carbon dioxide reaches a supercritical state, and use supercritical carbon dioxide to swell the polymer carrier;

[0047] ②Catalyst activation: After the swelling is completed, the pressure is slowly released, and nitrogen replacement is introduced for 5 to 10 times, and then a certain proportion of co-catalyst is added to the swelled catalyst intermediate to activate the catalyst;

[0048] ③Drying and forming: Add hexane solution into the reactor, wash it repeatedly for 5-10 times, remove the solvent in steps ① and ②, and dry to obtain a highly active supported metallocene catalyst.

Embodiment 1

[0051]The preparation steps of supported metallocene catalyst for ethylene polymerization are:

[0052] ①Supercritical carbon dioxide assisted loading: add 0.1mol / l (abbreviated as 0.1M, the same below) dichloro 4ml of zirconocene toluene solution is placed in a high-pressure reactor, and carbon dioxide is introduced, and the swelling penetration temperature is raised to 40°C, and the swelling pressure is increased to 10.0MPa, so that the carbon dioxide reaches a supercritical state, and the supercritical carbon dioxide is used to swell the polymer carrier 4 Hour;

[0053] ②Catalyst activation: Slowly release the pressure after the swelling is completed, cool down to room temperature, pass nitrogen into the reactor for 5 to 10 times, then add 200ml of 1M methylaluminoxane toluene solution, heat up to 60°C and reflux for 1 to 4 Hours for catalyst activation;

[0054] ③ Drying and forming: Add 500ml of hexane solution into the reactor, wash it repeatedly for 5-10 times, remove...

Embodiment 2

[0059] Except that zirconocene dichloride was replaced by bis(ethylcyclopentadiene) zirconium dichloride, the preparation method of the catalyst component was the same as in Example 1.

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
particle sizeaaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention discloses a loaded type metallocene catalyst for vinyl polymerization and a preparation method thereof. The loaded type metallocene catalyst comprises a polymer microsphere, a metallocene compound which is loaded onto the polymer microsphere, and aluminum alkyl, wherein the loading content of zirconium in the catalyst is 0.1 to 5 wt%; the loading content of aluminum is 10 to 36 wt%;the loading content of carrier is 59 to 89.9 wt%. The preparation method comprises the following steps of in the loading process, adding an aromatic hydrocarbon solution of metallocene compound into the polymer microsphere, swelling the polymer microsphere by supercritical carbon dioxide, adding the aluminoxane alkyl to activate the catalyst, and finally drying and forming. The loaded type metallocene catalyst has the advantages that the form of the prepared metallocene catalyst particles is good, the polymerizing activity is high, the dynamics in polymerizing reaction is stable, and the molecular weight of the polymerized product is controllable.

Description

technical field [0001] The invention belongs to the field of supported metallocene catalysts, in particular to a supported metallocene catalyst for ethylene polymerization and a method for preparing the supported metallocene catalyst by treating porous polymer microspheres with supercritical carbon dioxide. Background technique [0002] Metallocene polyethylene (mPE) is the earliest metallocene polyolefin to realize industrial production, and it is also the metallocene polymer with the largest output, the fastest practical progress, and the most research and development companies. At present, there are about a dozen large petrochemical companies in the world that can industrially produce metallocene products, but in my country, only a few polyolefin manufacturers such as Daqing Petrochemical Company, Dushanzi Petrochemical Company, and Qilu Petrochemical Company have produced metallocene polyethylene products. At the end of 2011, the Daqing Chemical Research Center of the Ch...

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): C08F10/02C08F4/02C08F4/6592C08F110/02
CPCC08F10/02C08F110/02C08F4/027C08F4/65925C08F2500/18Y02P20/54
Inventor 于广臣邓云平陈晓辉丁力
Owner 吉化集团吉林市天龙催化剂有限公司
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