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Solid-phase compound type ozone oxidation catalyst and preparation method thereof

A technology of ozone oxidation and catalyst, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the waste of impregnation solution, loss of active components, high production cost, etc. problem, to achieve the effect of enriching surface hydroxyl groups, strong surface hydroxylation degree, and improving oxidation efficiency

Inactive Publication Date: 2017-01-25
浙江巨能环境工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the preparation process, there are problems such as waste of impregnation solution, pollution caused by nitrogen oxides generated during nitrate activation and roasting, high production cost, and loss of active components during use, which leads to a decrease in catalytic activity.

Method used

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  • Solid-phase compound type ozone oxidation catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A.Ti / γ-Al 2 o 3 Preparation of catalytic materials

[0038] (1) Carrier pretreatment: first, powdery γ-Al with a particle size of 90 mesh 2 o 3 Place in a mixture of ethanol: acetone = 1:10 by volume and ultrasonically vibrate for 20 minutes to remove organic matter on the surface; then, shake the γ-Al 2 o 3 Add 0.5mol / L HNO 3 Boil for 30 minutes to remove the oxide layer on the surface; the acid-treated γ-Al 2 o 3 Take it out and wash it with ultrapure water until neutral, and dry it at 105°C;

[0039] (2) Preparation of gel solution: Add 5ml of 12mol / L concentrated hydrochloric acid dropwise to 840ml of absolute ethanol, add dropwise 3ml of analytical pure glacial acetic acid after stirring evenly, add 145ml of tetrabutyl titanate after stirring evenly, and stir rapidly Slowly add 15ml of ultrapure water dropwise to obtain a transparent and stable gel solution;

[0040] (3) Impregnation: Take 20g of pretreated γ-Al 2 o 3 Put it into the gel solution prepare...

Embodiment 2

[0048] A.Ti / γ-Al 2 o 3 Preparation of catalytic materials

[0049] (1) Carrier pretreatment: first, powdery γ-Al with a particle size of 80 mesh 2 o 3 Place in a mixture of ethanol: acetone = 5:1 by volume and ultrasonically vibrate for 2 minutes to remove organic matter on the surface; then, shake the γ-Al 2 o 3 Add 0.1mol / L HNO 3 Medium boiling treatment for 300min to remove the oxide layer on the surface; the acid-treated γ-Al 2 o 3 Take it out, wash it with ultrapure water until neutral, and dry it at 90°C;

[0050] (2) Preparation of gel solution: Add 5ml of 12mol / L concentrated hydrochloric acid dropwise to 840ml of absolute ethanol, add dropwise 3ml of analytical pure glacial acetic acid after stirring evenly, add 145ml of tetrabutyl titanate after stirring evenly, and stir rapidly Slowly add 15ml of ultrapure water dropwise to obtain a transparent and stable gel solution;

[0051] (3) Impregnation: Take 20g of pretreated γ-Al 2 o 3 Put it into the gel soluti...

Embodiment 3

[0059] A.Ti / γ-Al 2 o 3 Preparation of catalytic materials

[0060] (1) Carrier pretreatment: first, powdery γ-Al with a particle size of 85 mesh 2 o 3 Place in a mixture of ethanol: acetone = 10:1 by volume and ultrasonically vibrate for 240 minutes to remove organic matter on the surface; subsequently, shake the γ-Al 2 o 3 Add 4mol / L HNO 3 Boil for 10 minutes to remove the oxide layer on the surface; the acid-treated γ-Al 2 o 3 Take it out and wash it with ultrapure water until neutral, and dry it at 150°C;

[0061] (2) Preparation of gel solution: Add 5ml of 12mol / L concentrated hydrochloric acid dropwise to 840ml of absolute ethanol, add dropwise 3ml of analytical pure glacial acetic acid after stirring evenly, add 145ml of tetrabutyl titanate after stirring evenly, and stir rapidly Slowly add 15ml of ultrapure water dropwise to obtain a transparent and stable gel solution;

[0062] (3) Impregnation: Take 20g of pretreated γ-Al 2 o 3 Put it into the gel solution ...

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Abstract

The invention belongs to the technical field of catalysts and particularly relates to an ozone catalyst with an aim to provide a solid-phase compound type ozone oxidation catalyst low in preparation cost, easy to produce and good in catalytic performance and stability. The solid-phase compound type ozone oxidation catalyst is characterized in that Ti / gamma-Al2O3 and iron hydroxide are taken as catalyst components, and the Ti / gamma-Al2O3 and iron hydroxide are subjected to adhesion through an adhesion agent and pelletizing prior to drying, calcinating and cooling to obtain the ozone oxidation catalyst; the catalyst components respectively include, by weight, 50%-80% of Ti / gamma-Al2O3 and 20%-50% of ion hydroxide; Ti / gamma-Al2O3 takes powdered gamma-aluminum oxide as a carrier and TiO2 of different crystal forms as a load type catalytic material; ion hydroxide is the catalyst material is obtained by dissolving ferrite and ferric salt in water for reaction under the alkaline condition after adding of alcohols prior to drying and grinding.

Description

technical field [0001] The invention belongs to the technical field of catalysts, in particular to an ozone oxidation catalyst. Background technique [0002] Ozone oxidation technology has been widely used in the field of water treatment, such as sterilization and disinfection of urban water supply, advanced treatment of industrial wastewater, etc. At present, this technology has received more and more attention in the treatment of organic wastewater, especially refractory organic wastewater. However, due to its oxidation selectivity, low ozone utilization rate, and high operating costs, the popularization and application of ozone oxidation technology has been severely limited. Against this background, the use of catalysts to improve the efficiency of ozone oxidation, enhance the ability of ozone oxidation, and reduce operating costs has attracted much attention. [0003] Compared with homogeneous catalysts, solid-phase ozonation catalysts have higher application value, so...

Claims

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Application Information

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IPC IPC(8): B01J23/745C02F1/78C02F1/72C02F101/30
CPCB01J23/745C02F1/725C02F1/78C02F2101/30
Inventor 凌明叶国祥李婷郭慧朱宏博
Owner 浙江巨能环境工程有限公司
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