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High-wear-resistant super-amphiphobic catalyst coating and preparation method and application thereof

A catalyst and catalyst carrier technology, which can be used in catalyst activation/preparation, catalyst carrier, chemical instruments and methods, etc., can solve the problems of unsustainable oleophobic and hydrophobic properties, poor wear resistance of coatings, etc., and achieve good industrial application prospects. Good capacitance and the effect of reducing production energy consumption

Active Publication Date: 2018-01-12
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the defects of poor abrasion resistance and unsustainable oleophobic and hydrophobic properties of the existing super-amphiphobic coating due to the easily damaged microscopic rough structure of the surface, and to provide a microscopically rough coating. Super amphiphobic catalyst coating with stable structure, high wear resistance and long-lasting performance

Method used

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  • High-wear-resistant super-amphiphobic catalyst coating and preparation method and application thereof
  • High-wear-resistant super-amphiphobic catalyst coating and preparation method and application thereof
  • High-wear-resistant super-amphiphobic catalyst coating and preparation method and application thereof

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Effect test

Embodiment 1

[0037] The present embodiment provides a kind of highly wear-resistant super amphiphobic catalyst coating, and this coating is made through the following steps:

[0038] (1) Obtain silica microspheres, modify them with tridecafluorooctyltrimethoxysilane to be oleophobic and hydrophobic, wash and dry them for later use.

[0039] (2) Use aluminum chloride to hydrolyze under acidic conditions to prepare aluminum hydroxide gel, place the modified silica microspheres obtained in step (1) in the hydrolysis reaction system, keep stirring, the hydrolysis temperature is 40°C, and the hydrolysis The time is 30 minutes, and then the excess aluminum hydroxide gel is removed by filtration, and the silica microspheres coated with aluminum hydroxide gel are placed in a muffle furnace for roasting at a temperature of 220°C for 3 hours, and then cooled for later use.

[0040] (3) Add 10ml of tetraethyl orthosilicate into 100ml of absolute ethanol, stir for 10min, then add 3g of alumina-coated ...

Embodiment 2

[0047] The highly wear-resistant superamphiphobic catalyst coating provided in this embodiment is prepared through the following steps:

[0048] (1) Obtain silica microspheres, and use fluorine modifier to carry out oleophobic and hydrophobic modification on them, wash and dry them for later use.

[0049] (2) To prepare a saturated sodium chloride solution, add the silicon dioxide microspheres obtained in step (1) into a saturated sodium chloride saturated solution, heat and stir until the silicon dioxide is evenly coated with a layer of sodium chloride, and take out ,spare.

[0050] (3) Add 15ml of tetrabutyl titanate into 100ml of absolute ethanol, ultrasonicate for 30min, then add 4g of silica microspheres coated with sodium chloride at the same time under ultrasonic operation, stir for 10min, filter, and place in air at room temperature Naturally air-dried in the atmosphere, then placed in a muffle furnace for 2 h at 500° C., washed three times with deionized water and on...

Embodiment 3

[0056] The highly wear-resistant superamphiphobic catalyst coating provided in this embodiment is prepared through the following steps:

[0057] (1) Obtain silica microspheres, and use fluorine modifier to carry out oleophobic and hydrophobic modification on them, wash and dry them for later use.

[0058] (2) To prepare a saturated sodium chloride solution, add the silicon dioxide microspheres obtained in step (1) into a saturated sodium chloride saturated solution, heat and stir until the silicon dioxide is evenly coated with a layer of sodium chloride, and take out ,spare.

[0059] (3) Add 10ml of tetraethyl orthosilicate to 100ml of absolute ethanol, stir for 10min, then add 4g of silica microspheres coated with sodium chloride and ammonia water at the same time under ultrasonic operation, and react at 70°C for 10h , washed three times by centrifugation with deionized water, and vacuum-dried to obtain micro-nano composite microspheres 2.

[0060] figure 2 Shown is a sch...

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Abstract

The invention relates to the technical field of catalysts and particularly provides a high-wear-resistant super-amphiphobic catalyst coating. A super-amphiphobic coating is prepared on the surface ofa catalyst carrier, so that the coke deposition rate of the surface of the catalyst can be effectively reduced, and the service life of the catalyst is prolonged. Due to an embedded composite microsphere on the surface of the super-amphiphobic coating, the problems difficult to solve in the prior art that an inorganic particle on a surface of the super-amphiphobic coating is taken away from the coating under the action of the frictional force and then the micro coarse structure is destroyed are solved. A gap is further arranged between a core and a shell of the composite microsphere, so that astable air cavity is formed on the solid-liquid interface, the infiltrating of a liquid drop is effectively stopped, and the oleophobic and hydrophobic performances are further improved. The materials adopted by the provided high-wear-resistant super-amphiphobic catalyst coating are easy to prepare or are products capable of being directly purchased, the preparation process is simple and is easyto operate, and the high-wear-resistant super-amphiphobic catalyst coating has an excellent industrial application prospect.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a highly wear-resistant super-amphiphobic catalyst coating and a preparation method and application thereof. Background technique [0002] Hydrogenation catalysts are prone to carbon deposits (also known as coking) during operation. When these carbon deposits cover the active center of the catalyst, the catalyst will be deactivated. At this time, the catalyst must be regenerated to restore its activity, but this It will inevitably reduce catalytic efficiency and increase production energy consumption. Because super-amphiphobic materials have the advantages of anti-fouling, anti-fog, low adhesion, and self-cleaning, if the catalyst can have a super-amphiphobic surface, the carbon deposition rate can be slowed down and the service life of the catalyst can be extended. The so-called super amphiphobic (that is, oleophobic and hydrophobic, can also be called "everything...

Claims

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Application Information

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IPC IPC(8): B01J32/00B01J31/26B01J37/02B01J37/08
Inventor 林科赵文涛郭立新
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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