Macroporous two-dimensional double-channel spherical composite carrier and composite material containing polyethylene catalyst and their preparation method and application

A composite carrier and dual-channel technology, applied in the production of bulk chemicals, can solve the problems of poor thermal stability and hydrothermal stability, low ethylene polymerization activity, affecting catalytic activity, etc., and achieve stable mesoporous structure and high catalytic activity. , the effect of good flow performance

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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  • Macroporous two-dimensional double-channel spherical composite carrier and composite material containing polyethylene catalyst and their preparation method and application
  • Macroporous two-dimensional double-channel spherical composite carrier and composite material containing polyethylene catalyst and their preparation method and application
  • Macroporous two-dimensional double-channel spherical composite carrier and composite material containing polyethylene catalyst and their preparation method and application

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preparation example Construction

[0034] In a second aspect, the present invention provides a method for preparing a macroporous two-dimensional double-channel spherical composite carrier, the method comprising the following steps:

[0035] Preparation of the mesoporous material: in the presence of ethanol in the acidic aqueous solution, the template agent and the silicon source are mixed and reacted, and the mixture obtained after the mixed reaction is crystallized and filtered;

[0036] 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;

[0037] Preparation of a composite carrier: grinding, spray drying and calcining the prepared mesoporous material and the silica gel in sequence,

[0038] Wherein, the method makes the obtained composite carrier contain silica, and the pore volume of the composite carrier is 0.5-1.5mL / g, and the specific surface area is 200-650m 2 / g, the average pa...

Embodiment 1

[0091] This example is used to illustrate the macroporous two-dimensional double-channel spherical composite carrier, the composite material containing polyethylene catalyst and their preparation methods described in the present invention.

[0092] (1) Preparation of spherical composite carrier

[0093] Add 1 g of triblock copolymer polyoxyethylene-polyoxypropylene-polyoxyethylene P123 and 1.69 g of ethanol to 28 mL of a buffer solution of acetic acid and sodium acetate with a pH value of 4.4, and stir at 15°C for 4 h until P123 dissolves , 6g of trimethylpentane was added to the above solution, and after stirring at 15°C for 8h, 2.13g of tetramethoxysilane was added to the above solution. Keep the temperature at 15°C and the pH value of 4.4 and stir for 20 hours, then transfer the solution to a polytetrafluoroethylene-lined reactor, crystallize in a 60°C oven for 24 hours, filter and wash to obtain a mesoporous filter cake .

[0094] Concentration is 15% by weight of water ...

Embodiment 2

[0112] This example is used to illustrate the macroporous two-dimensional double-channel spherical composite carrier, the composite material containing polyethylene catalyst and their preparation methods described in the present invention.

[0113] (1) Preparation of spherical composite carrier

[0114] Add 1 g of triblock copolymer polyoxyethylene-polyoxypropylene-polyoxyethylene P123 and 1.98 g of ethanol to 32 mL of a buffer solution of acetic acid and sodium acetate with a pH value of 4.8, and stir at 20 °C for 3.5 h to P123 After dissolving, 6g of trimethylpentane was added to the above solution, and after stirring at 20°C for 6h, 2.02g of tetramethoxysilane was added to the above solution. Keep the temperature at 20°C and the pH value of 4.8 and stir for 24 hours, then transfer the solution to a polytetrafluoroethylene-lined reactor, crystallize in a 60°C oven for 24 hours, filter and wash to obtain a mesoporous filter cake .

[0115] The concentration is 13% by weight...

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Abstract

The invention relates to a macroporous two-dimensional dual-channel spherical composite carrier and a composite material containing a polyethylene catalyst, and preparation methods and application thereof, belonging to the field of catalysts. The composite carrier contains silica and has a pore volume of 0.5 to 1.5 mL/g, a specific surface area of 200 to 650 m<2>/g and an average particle size of 30 to 60 [mu]m; pore diameter distribution is in the form of bimodal distribution; and double peaks respectively correspond to a first most probable pore size of 7 to 14 nm and a second most probable pore size of 30 to 39 nm. The spherical composite carrier provided by the invention has a stable mesoporous structure, can maintain an ordered mesoporous structure after loading of active components and presents high activity in catalysis of polymerization of ethylene after loading of the polyethylene catalyst.

Description

technical field [0001] The present invention relates to the field of catalysts, in particular to a macroporous two-dimensional double-channel spherical composite carrier, a method for preparing a macroporous two-dimensional double-channel spherical composite carrier and a macroporous two-dimensional double-channel spherical composite carrier prepared by the method. Composite carrier, 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 in Applications 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 in catalysis, separation, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F4/02C08F10/02C08F4/646
CPCY02P20/52
Inventor 亢宇张明森
Owner CHINA PETROLEUM & CHEM CORP
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