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Through hole type alumina catalyst carrier and preparation method thereof

A catalyst carrier, alumina technology, applied in the direction of catalyst carrier, catalyst activation/preparation, physical/chemical process catalyst, etc., can solve the problems of inability to obtain an array structure, prolonged electrolysis time, etc., achieve high solubility, reduce usage, and cost. low effect

Active Publication Date: 2020-05-22
山东嘉虹化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] (d) Thorough oxidation method: The excessive oxidation method refers to prolonging the electrolysis time, so that the aluminum sheet is fully anodized from one side to penetrate to the underlying metal, and directly obtain a self-supporting through-hole film. The obvious disadvantage of the method is that it must be single Side oxidation, otherwise the array structure cannot be obtained

Method used

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  • Through hole type alumina catalyst carrier and preparation method thereof
  • Through hole type alumina catalyst carrier and preparation method thereof
  • Through hole type alumina catalyst carrier and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] A through-hole alumina catalyst carrier, such as figure 1 As shown, the following processing steps are included:

[0069] (1) Select 5 series aluminum alloy less than 0.5cm as the base material;

[0070] (2) Pretreating the aluminum substrate, the pretreatment process is alkaline-hot water washing-alkali washing-hot water washing-cold water washing-acid washing-water washing steps.

[0071] (3) Anodize the treated aluminum substrate to form an oxide film on the surface. The solution used for anodizing is a mixture of oxalic acid, phosphoric acid and sulfosalicylic acid. The concentration of oxalic acid is 0.25M, and the concentration of phosphoric acid is is 0.2M, the concentration of sulfosalicylic acid is 0.05M, the voltage of the anodic oxidation process is 20V, and the temperature is 30 o C, current density 2A / dm 2 , time 20min.

[0072] (4) The protective film is adsorbed on the surface of the porous layer of the anodized film, and the protective film is not ad...

Embodiment 2

[0077] A through-hole type alumina catalyst carrier, comprising the following processing steps:

[0078] (1) Select 5 series aluminum alloy less than 0.5cm as the base material;

[0079] (2) Pretreating the aluminum substrate, the pretreatment process is alkaline-hot water washing-alkali washing-hot water washing-cold water washing-acid washing-water washing steps.

[0080](3) Anodize the treated aluminum substrate to form an oxide film on the surface. The solution used for anodizing is a mixture of oxalic acid, phosphoric acid and sulfosalicylic acid. The concentration of oxalic acid is 0.275M, and the concentration of phosphoric acid is is 0.3M, the concentration of sulfosalicylic acid is 0.1M, the voltage of the anodic oxidation process is 25V, and the temperature is 30 o C, current density 2.5A / dm 2 , time 25min.

[0081] (4) The protective film is adsorbed on the surface of the porous layer of the anodized film, and the protective film is not adsorbed on the shielding ...

Embodiment 3

[0086] A through-hole type alumina catalyst carrier, comprising the following processing steps:

[0087] (1) Select 5 series aluminum alloy less than 0.5cm as the base material;

[0088] (2) Pretreating the aluminum substrate, the pretreatment process is alkaline-hot water washing-alkali washing-hot water washing-cold water washing-acid washing-water washing steps.

[0089] (3) Anodize the treated aluminum substrate to form an oxide film on the surface. The solution used for anodizing is a mixture of oxalic acid, phosphoric acid and sulfosalicylic acid. The concentration of oxalic acid is 0.3M, and the concentration of phosphoric acid is is 0.4M, the concentration of sulfosalicylic acid is 0.15M, the voltage of the anodic oxidation process is 30V, and the temperature is 30 o C, current density 3A / dm 2 , time 30min.

[0090] (4) The protective film is adsorbed on the surface of the porous layer of the anodized film, and the protective film is not adsorbed on the shielding la...

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Abstract

The invention provides a preparation method of a through hole type alumina catalyst carrier. The preparation method comprises the following steps: performing a selective adsorption reaction on a porous layer and a shielding layer by gamma-chloropropyltrimethylsilane, performing subsequent an alkaline corrosion reaction, effectively removing the shielding layer at the bottom of a pore channel, andperforming a chemical replacement reaction to remove an aluminum base material, thereby obtaining the through-hole type aluminum oxide catalyst carrier.

Description

technical field [0001] The invention relates to a through-hole alumina catalyst carrier and a preparation method thereof, which belongs to the fields of electrochemistry and catalysts, and is especially suitable for the field of catalyst carriers and a preparation method thereof. [0002] technical background [0003] Aluminum or aluminum alloy anodizing refers to the process of immersing aluminum or aluminum alloy in a suitable electrolyte as an anode for electrification, and forming an oxide film (Al2O layer) on the surface of aluminum or aluminum alloy. The existence of this layer of oxide film can improve the corrosion resistance of aluminum alloy. At the same time, with the help of the special structure of the oxide film and the later treatment process, for example, the anodic oxide film can also be combined with surface painting and other further treatments to make the substrate more harsh. To achieve better protection in the environment, or to decorate aluminum and alu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/04B01J35/04B01J37/00B01J37/34B01J32/00
CPCB01J37/348B01J37/009B01J21/04B01J35/56Y02P20/52
Inventor 王永芝
Owner 山东嘉虹化工有限公司
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