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Spherical composite carrier with macroporous two-dimensional straight-through channels and composite material containing polyethylene catalyst as well as its preparation method and application

A technology of composite carrier and mesoporous material, which is applied in spherical composite carrier with macroporous two-dimensional straight-through channel and composite material containing polyethylene catalyst as well as its preparation and application fields, which can solve the problem of affecting loading effect, thermal stability and hydrothermal Poor stability, pore wall collapse and other problems, to achieve the effect of good flow performance of the sphere, regular and orderly pore structure, and stable mesoporous structure

Active Publication Date: 2018-11-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main reason for the low ethylene polymerization activity of the mesoporous material MCM-41 after loading the catalyst is that the thermal and hydrothermal stability of the pore wall structure of MCM-41 is poor, and the pore wall partially collapses during the loading process, which affects the Loading effect, so that it affects the catalytic activity

Method used

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  • Spherical composite carrier with macroporous two-dimensional straight-through channels and composite material containing polyethylene catalyst as well as its preparation method and application
  • Spherical composite carrier with macroporous two-dimensional straight-through channels and composite material containing polyethylene catalyst as well as its preparation method and application
  • Spherical composite carrier with macroporous two-dimensional straight-through channels and composite material containing polyethylene catalyst as well as its preparation method and application

Examples

Experimental program
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Effect test

preparation example Construction

[0039] In a second aspect, the present invention provides a method for preparing a spherical composite carrier with large pores and two-dimensional straight-through channels, the method comprising the following steps:

[0040] Preparation of mesoporous material: in the presence of an alkaline solution, the template agent and the silicon source are mixed and reacted, and the mixture obtained after the mixed reaction is filtered;

[0041] Prepare silica gel: in the presence of inorganic acid solution, react water glass and n-butanol, and then adjust the pH value of the solution obtained after the reaction to 2-4;

[0042] Preparing the carrier: mixing the prepared mesoporous material and the silica gel, followed by grinding, spray drying and calcining;

[0043] Wherein, the method makes the obtained carrier have an average particle diameter of 10-80 μm and a specific surface area of ​​200-600 μm 2 / g, the pore volume is 0.1-2.5mL / g, the pore size distribution is a bimodal distr...

Embodiment 1

[0094] This example is used to illustrate the macroporous two-dimensional through-channel spherical composite carrier, the composite material containing polyethylene catalyst and their preparation methods.

[0095] (1) Preparation of carrier

[0096] 0.1mol tetraethyl orthosilicate and 0.037mol cetyltrimethylammonium bromide were added to 25% by weight of ammonia solution, mixed reaction was carried out at 80°C and pH value was 9 for 4h, and then the mixed The mixture obtained after the reaction is filtered and washed, and finally the obtained reaction material is subjected to suction filtration to form a filter cake.

[0097] Concentration is 15% by weight of water glass and concentration of 12% by weight of sulfuric acid solution and n-butanol mixed with a weight ratio of 5:1:1 and contact reaction at 20 ° C for 1.5h, followed by concentration of 98% by weight Sulfuric acid was used to adjust the pH value to 3, and then the obtained reaction material was subjected to suctio...

Embodiment 2

[0116] This example is used to illustrate the macroporous two-dimensional through-channel spherical composite carrier, the composite material containing polyethylene catalyst and their preparation methods described in the present invention.

[0117] (1) Preparation of carrier

[0118] 0.1mol ethyl orthosilicate and 0.032mol cetyltrimethylammonium bromide are added in the ammonia solution of 22% by weight, carry out mixing reaction under the condition of 75 ℃ and pH value 9.5, then mix reaction The obtained mixture is filtered and washed, and finally the obtained reaction material is subjected to suction filtration to form a filter cake.

[0119] The concentration is 13% by weight of water glass and the concentration of 15% by weight of nitric acid solution and n-butanol are mixed with a weight ratio of 4:1.2:1 and contacted at 25 ° C for 1.3h, followed by a concentration of 98% by weight Sulfuric acid was used to adjust the pH value to 3.5, and then the obtained reaction mate...

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Abstract

The invention relates to the field of catalysts, and discloses a spherical composite carrier with a macroporous two-dimensional through a pore channel and a composite material containing a polyethylene catalyst, and preparation methods and application thereof. The carrier provided by the invention has an average particle diameter of 10 to 80 [mu]m, a specific surface area of 200 to 600 m2 / g, a pore volume of 0.1 to 2.5 mL / g, and pore size distribution in bimodal distribution, wherein two peaks respectively corresponds to a first most probable pore size of 1.2 to 4.5 nm and a second most probable pore size of 32 to 60 nm. The carrier provided by the invention has stable mesoporous structure, still can maintain an ordered mesoporous structure after loading active components, and has high activity when loading the polyethylene catalyst to catalyze ethylene for polymerization reaction.

Description

technical field [0001] The present invention relates to the field of catalysts, in particular to a spherical composite carrier with two-dimensional macropores through channels, a method for preparing a spherical composite carrier with two-dimensional macropores through channels, and a two-dimensional through-through macropores prepared by the method. Spherical composite carrier with pores, a composite material containing a polyethylene catalyst, a preparation method of a composite material containing a polyethylene catalyst, and a composite material containing a polyethylene catalyst prepared by the method, a composite material containing a polyethylene catalyst Application of composite materials in catalytic ethylene polymerization. Background technique [0002] In 1992, Mobile Company synthesized a highly ordered structured mesoporous material with high specific surface area, regular pore structure and narrow pore size distribution, making mesoporous materials widely used ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F4/02C08F4/16C08F110/02
Inventor 亢宇张明森
Owner CHINA PETROLEUM & CHEM CORP
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