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

Supported metallocene catalyst and its preparation method

A metallocene catalyst and metallocene compound technology, applied in the field of supported metallocene catalyst and its preparation, can solve the problems of small particle size and low catalytic activity of mesoporous materials

Active Publication Date: 2014-02-05
CHINA PETROLEUM & CHEM CORP +1
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to overcome the problems that the catalytic activity of the supported metallocene silica gel catalyst in the prior art is still low and the particle size of the mesoporous material is small, and provide a high-activity large-particle supported metallocene composite catalyst

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
  • Supported metallocene catalyst and its preparation method
  • Supported metallocene catalyst and its preparation method
  • Supported metallocene catalyst and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0042] According to the preparation method of the supported metallocene catalyst of the present invention, the carrier, the alkylaluminoxane, and the metallocene compound have been described above, and will not be repeated here.

[0043] In the above method, silica gel is added before crystallization, and tetraethyl orthosilicate is used as a silicon source, and polyoxyethylene-polyoxypropylene-polyoxyethylene template is added, so that the silica coating produced by hydrolysis of tetraethyl orthosilicate Coated on the surface of silica gel, they together form spherical mesoporous silica.

[0044] The preparation method of the supported metallocene catalyst according to the present invention comprises successively loading alkyl aluminoxane and metallocene compound on the carrier under the protection of inert gas. The alkylaluminoxane and metallocene compound can be supported on the carrier by methods known to those skilled in the art. Preferably, the method for sequentially l...

Embodiment 1

[0063] This example is used to illustrate the supported metallocene catalyst and its preparation method according to the present invention.

[0064] 2.0 grams of P123 (the substance whose registration number is 9003-11-6 in American Chemical Abstracts, its average molecular weight Mn=5800) and 15 grams of N, N-dimethylformamide (DMF) were added to 11.2 grams of 37% In a solution of hydrochloric acid and 64ml of water, stir at 40°C until P123 is completely dissolved; then add 4.45 grams of ethyl orthosilicate to the above solution and stir at 40°C for 1 hour, then add 1 gram of industrial 955 silica gel, filter, After washing and drying, the original powder spherical mesoporous silica was obtained; the spherical mesoporous silica was calcined in a muffle furnace at 600°C for 24 hours to remove the template agent and obtain the final spherical mesoporous silica (named as GJ-MBQ).

[0065] Spherical mesoporous silica GJ-MBQ was calcined at 400°C for 10 hours under nitrogen prote...

experiment Embodiment 1

[0080] This experimental example is used to illustrate the catalytic activity of the supported metallocene catalyst according to the present invention.

[0081] In a 2-liter stainless steel autoclave, replace three times each with nitrogen and ethylene, then add 200 ml of hexane, raise the temperature of the kettle to 80 ° C, then add 800 ml of hexane, and add 2 ml of hexane with the addition of hexane The concentration is 1 mole / liter triethylaluminum (TEA) hexane solution, then add 55.7 mg MAO / GJ-MBQ-YIN, feed ethylene to raise the pressure to 1.0MPa and maintain it at 1.0MPa, and react at 70°C 1 hour. Obtain 114 grams of polyethylene particle powder, the bulk density (BD) of this polyethylene particle powder is 0.293g / ml, melt index MI 2.16 = 0.048 g / 10 min. It is determined by calculation that the efficiency of the catalyst is 2047gPE / gcat h (ie, 9.3×10 7 g PE / mol Zr h).

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
diameteraaaaaaaaaa
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention discloses a supported metallocene catalyst and is characterized in that the catalyst comprises a carrier and alkyl aluminoxane and a metallocene compound which are loaded on the carrier. The carrier is a spherical mesoporous silicon dioxide carrier. The average particle diameter of the carrier is 20-80 micrometers, its specific surface area is 400-700 square meter / gram, its pore volume is 0.3-1.5 ml / g, and its most probable pore size is 3-20 nanometers. The metallocene compound has a structure as shown in the formula 1, in which M is one selected from the group consisting of titanium, zirconium and hafnium and X is halogen. The invention provides a method for preparing the above supported metallocene catalyst, comprising the step of successively loading alkyl aluminoxane and the metallocene compound on the carrier under the protection of an inert gas. As the particle size of the spherical mesoporous silicon dioxide is large and it has high ordered pore size and pore structure, good mechanical strength and molecular catalytic adsorption performance, the supported metallocene catalyst provided by the invention has high catalytic activity.

Description

technical field [0001] The invention relates to a supported metallocene catalyst and a preparation method thereof. Background technique [0002] The development and application of metallocene catalysts is another major breakthrough in the field of olefin polymerization catalysts after the traditional Ziegler-Natta catalysts. Due to the large amount of methylaluminoxane (MAO) required to achieve high activity of homogeneous metallocene catalysts, the production cost is high, and the obtained polymer has no particle shape, it cannot be used in the widely used slurry method or gas phase polymerization process. use. Moreover, the activity of the metallocene catalyst is very high, and it is prone to localized polymerization at a faster rate during the polymerization reaction, which in turn leads to detonation. [0003] An effective way to solve the above problems is to carry out loading treatment on soluble metallocene catalysts. At present, there are many reports on the suppo...

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): C08F4/6592C08F4/02C08F10/00
Inventor 亢宇张明森王洪涛邱波郭顺刘长城
Owner CHINA PETROLEUM & CHEM CORP
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