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Nano level catalyst carrier for poly olefin and its prepn

A catalyst carrier and nano-scale technology, which is applied in the field of polyolefin nano-scale catalyst carrier and its preparation, can solve the problems of low content of Zr loaded active component and particle size not reaching nano-scale.

Inactive Publication Date: 2004-09-08
柯扬船
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology does not adopt the pillar support method, nor does it adopt the co-template technology. Therefore, the Zr content of the active component of the montmorillonite is very low. In fact, according to the method of CN 1268406A, the particle size of the montmorillonite does not reach the nanometer scale

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1 Layered silicate clay / SiO 2 Preparation of composite carrier

[0024] First, to prepare the organoclay, add 0.9M aqueous C 16 h 33 N + (CH 3 ) 3 Ammonium salt 30ml. The suspension was stirred at 50° C. for 24 hours to obtain montmorillonite in which sodium ions and quaternary ammonium salts in the clay were completely exchanged. The final organoclay was separated by centrifugation, washed repeatedly with ethanol to remove excess ions, and then resuspended in water. The product is then collected by centrifugation and dried at room temperature to keep the water content below 20%, to obtain the primary carrier.

[0025] Secondly, add to the above-mentioned primary carrier according to the mass ratio TEOS: primary carrier = 6:4, the obtained mixed system is sheared vigorously in the mixer, and the finally obtained mixture is dried in an oven to obtain a powder, and then roasted in a muffle furnace at 650°C 3 hours. Obtain off-white powder carrier, and the...

Embodiment 2

[0026] Example 2 Layered silicate clay / MgCl 2 Preparation of composite carrier

[0027] First prepare alcoholated MgCl 2 Carrier, add 0.9M aqueous C to a mass of 10 g of a 3 wt% clay suspension 16 h 33 N + (CH 3 ) 3 Ammonium salt 30ml. The suspension was stirred at 50° C. for 24 hours to obtain montmorillonite in which sodium ions and quaternary ammonium salts in the clay were completely exchanged. The final organoclay was separated by centrifugation, washed repeatedly with ethanol to remove excess ions, and then resuspended in water. The product is then collected by centrifugation and dried at room temperature to keep the water content below 20%, to obtain the primary carrier.

[0028] Secondly, add to the above-mentioned primary carrier according to the mass ratio TEOS: primary carrier = 6:4, the obtained mixed system is sheared vigorously in the mixer, and the finally obtained mixture is dried in an oven to obtain a powder, and then roasted in a muffle furnace at 65...

Embodiment 3

[0029] Example 3 Layered silicate clay / SiO 2 Preparation of composite carrier

[0030] In the first step, to prepare the organoclay, add 0.9M aqueous C 16 h 33 N + (CH 3 ) 3 ammonium salt. The amount of ammonium salt added is twice the cation exchange capacity of the clay. The suspension was stirred at 50° C. for 24 hours to obtain montmorillonite in which sodium ions and quaternary ammonium salts in the clay were completely exchanged. The final organoclay was separated by centrifugation, washed repeatedly with ethanol to remove excess ions, and then resuspended in water. This product was then collected by centrifugation and kept at room temperature for later use.

[0031] In the second step, add neutral amine solvated organoclay to synthesize pure alkylamine (C 10 h 21 NH 2 ) into the organoclay prepared above, mixed according to the following molar ratio, amine:organoclay=5:1, and the whole reaction mixture was stirred for 30 minutes, and the obtained mixture was ...

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PUM

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Abstract

The present invention provides one kind of nano level catalyst carrier for polyolefin and its preparation process. Laminated silicate through cationic resin exchange reaction processing is made to compound with amine molecule and silica precursor to obtain composition, and the composition is roasted and palletized to prepare the catalyst carrier with specific surface area over 200 sq m / g and pore size of 2-5 nm. The carrier has the features of high titanium carrying amount, large pore size and containing no chlorine element. The carrier is used to load titanium tetrachloride, alkoxy titanium or other catalyst before used together with alkyl aluminum system in the polymerization of propylene or ethylene and has the characteristic of in-situ producing nano composite polyolefin material in one step.

Description

technical field [0001] The invention provides a polyolefin nanoscale catalyst carrier and a preparation method thereof. It is an innovation of the carrier and materials used in the polyolefin polymer polymerization catalyst. The layered silicate treated by cation exchange reaction is reacted with amine molecules, and then compounded with the precursor of silicon oxide to obtain a composite of silicon oxide and layered silicate. After roasting, the surface area is 200m 2 Nanoparticles above / g, the nanoparticle size is 5-100nm, after granulation, a catalyst carrier with a pore size of 2-5nm is formed. This carrier is used to support catalysts such as titanium tetrachloride and alkoxy titanium, and maintains a nanostructure after granulation. This catalyst is used in the polymerization of ethylene or propylene together with the alkylaluminum system, and has the unique property of producing polyolefin nanocomposites in one step. The prepared carrier has the characteristics of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F4/02C08F10/00
Inventor 柯扬船
Owner 柯扬船
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