Aluminum oxide slurry for spray coating and preparation method thereof

A technology of alumina and slurry, which is applied in chemical instruments and methods, catalyst carriers, chemical/physical processes, etc., can solve the problems of poor spraying effect, large slurry particle size, and easy clogging of spraying, so as to improve production efficiency, bubble The effect of small diameter and sufficient dispersion

Active Publication Date: 2013-12-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the technical problems to be solved by the present invention is the large particle size and poor dispersion of the slurry in the prior art, resulting in the problems of easy clogging of spraying and poor spraying effect. A new alumina slurry for spraying is provided.

Method used

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  • Aluminum oxide slurry for spray coating and preparation method thereof
  • Aluminum oxide slurry for spray coating and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Add 400 grams of water, 1000 grams of 15% aluminum sol, 40 grams of lanthanum chloride solution with a concentration of 20%, and 700 grams of γ-alumina powder into the mixer and mix for 60 minutes. Take 20 grams of EMC and 10 grams of Span and add water. 400 grams were placed in a foaming machine to foam to obtain a foam, added to the above slurry, mixed for 20 minutes, added to a colloid mill and ground for 40 minutes to obtain the required slurry A.

Embodiment 2

[0026] Add 500 grams of water, 1000 grams of 20% aluminum sol, 100 grams of 50% tin chloride solution, and 1000 grams of δ-alumina powder into the mixer and mix for 40 minutes. Take 50 grams of PVA and 10 grams of Tween Add 600 grams of water and place it in a foaming machine to foam to obtain a foam, add it to the above slurry, mix for 20 minutes, add it to a colloid mill and grind for 60 minutes to obtain the required slurry B.

Embodiment 3

[0028] Add 300 grams of water, 2000 grams of 40% aluminum sol, 80 grams of 10% cerous chloride solution, and 300 grams of θ-alumina powder into the mixer and stir for 40 minutes. Take 50 grams of HPMC, 20 grams of poly Add 500 grams of ethylene glycol and water and place it in a foaming machine to foam to obtain a foam, add it to the above slurry, mix for 20 minutes, add it to a colloid mill and grind for 60 minutes to obtain the required slurry C.

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Abstract

The invention relates to aluminum oxide slurry for spray coating and a preparation method thereof, which mainly solve the problems that in the prior art, the aluminum oxide slurry has high granularity and poor uniformity and dispersibility, so the blockage is easy to be caused during the spray coating, the atomization effect is poor, and the prepared coating has poor uniformity and poor firmness. The aluminum oxide slurry adopts the technical scheme that the aluminum oxide slurry comprises the following ingredients: water, aluminum sol, aluminum oxide, cation and anion regulating agents and foaming agents, wherein the aluminum sol, the aluminum oxide and the cation and anion regulating agents are dissolved in the water under the stirring condition and are sufficiently mixed, and first slurry is obtained; a certain quantity of foaming agents and water are foamed by a foaming machine, and the foam is added into the first slurry; and the slurry added with the foam is fast emulsified and ground in a short time in a colloid mill. The problems are perfectly solved, and the aluminum oxide slurry can be used for industrial preparation of the aluminum oxide slurry in layered composite carriers.

Description

technical field [0001] The invention relates to an alumina slurry for spraying and a preparation method thereof. Background technique [0002] The non-uniform distribution of active components in the carrier can reduce the amount of precious metals and increase the utilization rate of precious metals; at the same time, in many reactions, catalysts with non-uniform distribution also show better activity, selectivity and lifetime than catalysts with uniform distribution. In the early days, the effect of non-uniform distribution was often achieved through the control of impregnation, but it was often difficult to control the distribution range of the catalyst. This requires a special carrier, which is composed of an inert core and a coating, only the coating absorbs metal and the thickness of the coating is controllable, which is a layered composite carrier. A heterogeneous catalyst with controllable thickness and distribution range can be obtained by impregnating the catalyst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J32/00
Inventor 马春景缪长喜李应成张惠明
Owner CHINA PETROLEUM & CHEM CORP
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