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Meso-porous composite material, preparation method thereof, catalyst ingredient preparation method, and polyethylene preparation method

A composite material and catalyst technology, applied in the field of mesoporous composite materials, can solve the problem of low catalytic activity and achieve the effect of high catalytic activity

Active Publication Date: 2015-12-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the technical problem of low catalytic activity of supported polyethylene catalysts in the prior art, provide a kind of mesoporous composite material, the preparation method of this mesoporous composite material, and the mesoporous composite material prepared by this method , the present invention also relates to a catalyst component, and a method for preparing polyethylene

Method used

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  • Meso-porous composite material, preparation method thereof, catalyst ingredient preparation method, and polyethylene preparation method
  • Meso-porous composite material, preparation method thereof, catalyst ingredient preparation method, and polyethylene preparation method
  • Meso-porous composite material, preparation method thereof, catalyst ingredient preparation method, and polyethylene preparation method

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preparation example Construction

[0033] According to a second aspect of the present invention, the present invention provides a method for preparing a mesoporous composite material, the method comprising the following steps:

[0034] (1) providing or preparing a filter cake of a molecular sieve material with a hexagonal pore structure as component a;

[0035] (2) providing or preparing a filter cake of silica gel as component b;

[0036](3) After component a and component b are mixed and ball milled, spray drying is carried out to obtain a spherical mesoporous composite material;

[0037] Wherein, the components a and b make the pore volume of the mesoporous composite material 0.5-1.8mL / g, and the specific surface area is 200-650m 2 / g, the average particle size is 20-60 μm, and the pore size is bimodal, and the bimodal corresponds to the first most probable pore diameter and the second most probable pore diameter, and the first most probable pore diameter is 1-3nm, so The second most probable pore diameter...

Embodiment 1

[0082] This example is used to illustrate the mesoporous composite material and catalyst component of the present invention and their preparation methods.

[0083] (1) Preparation of mesoporous composite materials

[0084] Cetyltrimethylammonium bromide and tetraethyl orthosilicate are added to the ammonia solution with a concentration of 25% by weight, and ethyl orthosilicate, cetyltrimethylammonium bromide, ammonia in ammoniacal liquor The molar ratio with water is 1:0.37:2.8:142, and stirred at 80°C for 24 hours, then hydrothermally treated at 100°C for 24 hours, then filtered and washed with deionized water for 4 times, and then suction filtered to obtain Filter cake A1 of mesoporous molecular sieve material with hexagonal channel structure.

[0085] The water glass with a concentration of 15% by weight and the sulfuric acid solution with a concentration of 12% by weight were mixed at a weight ratio of 5:1 and contacted for 1.5 hours at 30° C., and then the pH value was a...

Embodiment 2

[0104] This example is used to illustrate the mesoporous composite material and catalyst component of the present invention and their preparation methods.

[0105] (1) Preparation of mesoporous composite carrier

[0106] Add cetyltrimethylammonium bromide and tetraethyl orthosilicate to the ammonia solution of 25% by weight, the ammonia in tetraethyl orthosilicate, cetyltrimethylammonium bromide, ammonia and The molar ratio of water is 1:0.37:2.8:142, and stirred at 90°C for 20 hours, then hydrothermally treated at 100°C for 24 hours, then filtered and washed with deionized water for 6 times, and then suction filtered to obtain hexagonal Filter cake A2 of mesoporous molecular sieve material with pore structure.

[0107] Water glass with a concentration of 15% by weight and a sulfuric acid solution with a concentration of 12% by weight are mixed in a weight ratio of 4:1 and contacted for 1 hour at 40°C, and then the pH value is adjusted to 98% by weight with sulfuric acid. 3....

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Abstract

The invention discloses a meso-porous composite material, a preparation method thereof, a catalyst ingredient preparation method, and a polyethylene preparation method. The meso-porous composite material comprises a molecular sieve material with a hexagonal tunnel structure and silica gel, the meso-porous composite material is spherical, the pore volume of the meso-porous composite material is 0.5-1.8mL / g, the specific surface area is 200-650m<2> / g, the average particle size is 20-60[mu]m, the apertures are distributed in a double peak manner, two peaks respectively correspond to a first most probable aperture and a second most probable aperture, the first most probable aperture is 1-3nm, and the second most probable aperture is 10-30nm. The meso-porous composite material still keeps an ordered meso-structure after loading. Active components Mg and Ti are loaded on the composite material to prepare a catalyst ingredient, and the catalyst ingredient makes a catalyst keep high catalytic activity in ethylene polymerization and allows polyethylene particle powder to be obtained.

Description

technical field [0001] The invention relates to a mesoporous composite material, a method for preparing the mesoporous composite material, and the mesoporous composite material prepared by the method, and also relates to a catalyst component and a method for preparing polyethylene. Background technique [0002] Since Mobile’s synthetic mesoporous materials with highly ordered pores have been synthesized in 1992, due to their high specific surface area, regular pore structure and narrow pore size distribution, mesoporous materials have been widely used in the fields of catalysis, separation, and medicine. Great attention. In 1998, Zhao Dongyuan and others synthesized a new type of material - mesoporous material SBA-15, which has highly ordered pore size (6-30nm), large pore volume (1.0cm 3 / g), thicker pore wall (4-6nm), high mechanical strength and good catalytic adsorption performance (see D.Y.Zhao, J.L.Feng, Q.S.Huo, etalScience279 (1998) 548-550). CN1341553A discloses a...

Claims

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Application Information

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IPC IPC(8): C08F10/02C08F4/02C08F4/646
CPCY02P20/52
Inventor 亢宇张明森王洪涛
Owner CHINA PETROLEUM & CHEM CORP
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