Super-macroporous three-dimensional cubic channel spherical composite carrier and supported polyethylene catalyst, and preparation methods and applications thereof

A three-dimensional cubic and composite carrier technology, applied in the preparation method and field of composite carrier, 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 performance The effect of high activity and load rate

Active Publication Date: 2017-03-01
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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  • Super-macroporous three-dimensional cubic channel spherical composite carrier and supported polyethylene catalyst, and preparation methods and applications thereof
  • Super-macroporous three-dimensional cubic channel spherical composite carrier and supported polyethylene catalyst, and preparation methods and applications thereof
  • Super-macroporous three-dimensional cubic channel spherical composite carrier and supported polyethylene catalyst, and preparation methods and applications thereof

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preparation example Construction

[0035] In a second aspect, the present invention provides a method for preparing a spherical composite carrier with super-large three-dimensional cubic channels, characterized in that the method comprises the following steps:

[0036] Preparation of silica filter cake: the template agent and the silicon source are mixed and reacted in an acidic aqueous solution, and then the materials obtained after the mixed reaction are filtered and washed in turn;

[0037] Preparation of silica gel: in the presence of an inorganic acid solution, the contact reaction of water glass and n-butanol is carried out, and then the pH value of the solution obtained after the reaction is adjusted to 2-4;

[0038] Preparation of carrier: the prepared silica filter cake and the silica gel are mixed and then ball-milled, spray-dried and calcined in sequence,

[0039] Wherein, the method makes the prepared carrier have an average particle diameter of 20-60 μm and a specific surface area of ​​200-600 m 2...

Embodiment 1

[0088] This example is used to illustrate the super-porous three-dimensional cubic channel spherical composite carrier, the supported polyethylene catalyst and the preparation method thereof according to the present invention.

[0089] (1) Preparation of carrier

[0090] Dissolve 6g of triblock copolymer polyoxyethylene-polyoxypropylene-polyoxyethylene P123 in 10mL of concentrated hydrochloric acid and 220mL of deionized aqueous solution, stir at 15°C for 4h to form a transparent solution, and then add 6g to this transparent solution. Ethanol and stirred for 1 h, then the solution was placed in an environment of 30 °C, 12.9 g of ethyl orthosilicate was added to it, the temperature was kept at 30 °C, and the pH value was 3. The conditions were stirred for 24 h, and then the solution was transferred to In the reaction kettle lined with polytetrafluoroethylene, the silica filter cake was obtained by filtration and washing after being crystallized in a 100 ℃ oven for 24 hours.

...

Embodiment 2

[0110]This example is used to illustrate the super-porous three-dimensional cubic channel spherical composite carrier, the supported polyethylene catalyst and the preparation method thereof according to the present invention.

[0111] (1) Preparation of carrier

[0112] Dissolve 6 g of triblock copolymer polyoxyethylene-polyoxypropylene-polyoxyethylene P123 in 10 mL of concentrated hydrochloric acid and 220 mL of deionized aqueous solution, stir at 20 °C for 6 h to form a transparent solution, and then add 5.6 g ethanol and stirred for 1 h, then the solution was placed in an environment of 35 ° C, 12.9 g of ethyl orthosilicate was added to it, the temperature was kept at 35 ° C and the pH value was 4, and stirred for 24 h, and then the solution was transferred The silica filter cake was obtained by filtration and washing after being crystallized in an oven at 90°C for 24 hours in a polytetrafluoroethylene-lined reaction kettle.

[0113] The water glass with a concentration of...

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Abstract

The invention relates to the field of catalyst, and discloses a super-macroporous three-dimensional cubic channel spherical composite carrier and a supported polyethylene catalyst, and preparation methods and applications thereof. The carrier has an average particle diameter of 20-60mum, specific surface area of 200-600m<2>/g, and pore volume of 0.1-2mL/g. Pore size distribution is bimodal distribution, wherein the two modals are respectively corresponding to first most probable pore sizes of 3-10nm and second most probable pore sizes of 30-39nm. The super-macroporous three-dimensional cubic channel spherical composite carrier has a stable mesoporous structure, and can maintain ordered mesoporous structure after loading the active component. The carrier has high activity while loading the polyethylene catalyst for catalyzing an ethylene polymerization reaction. The supported polyethylene catalyst has high loading rate.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a spherical composite carrier with super-large pore three-dimensional cubic channels, a method for preparing a spherical composite carrier with super-large 3-dimensional cubic channels, and a spherical composite carrier with super-large three-dimensional cubic channels prepared by the method A composite carrier, a supported polyethylene catalyst, a preparation method of a supported polyethylene catalyst, a supported polyethylene catalyst prepared by the method, and application of a supported polyethylene catalyst in catalyzing ethylene polymerization. Background technique [0002] Mesoporous molecular sieve materials have the advantages of orderly pore channels, adjustable pore size, large specific surface area and pore volume, etc., and are good catalyst and support materials. In recent years, heterogeneous catalysts such as solid acids and heteropolyacids prepared by using mesoporous m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F4/02C08F4/646C08F4/645C08F110/02
Inventor 亢宇张明森
Owner CHINA PETROLEUM & CHEM CORP
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