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Catalytic wet-type oxidation catalyst as well as preparation method and application thereof

A catalytic wet oxidation, catalyst technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problem that catalytic active components are easy to lose and cannot be removed at the same time organic pollutants etc.

Active Publication Date: 2019-03-15
厦门顺米可微电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The core of catalytic wet oxidation harmless wastewater treatment technology is catalyst, but the working temperature of existing catalysts is usually >200°C, and under the condition of lower than 200°C, only organic pollutants or ammonia nitrogen can be removed , but cannot remove organic pollutants and ammonia nitrogen pollutants at the same time, and the catalytic active components are easy to lose

Method used

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Examples

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Effect test

preparation example Construction

[0031] The present invention also provides a preparation method of the catalytic wet oxidation catalyst, comprising the following steps:

[0032] impregnating the carrier in a salt solution of the modified metal, and calcining to obtain a carrier loaded with the modified metal;

[0033] HAuCl 4 The solution, the protective agent aqueous solution and the reducing agent aqueous solution are mixed, and after a reduction reaction occurs, a carrier loaded with a modified metal is added for impregnation to obtain a catalytic wet oxidation catalyst.

[0034] In the present invention, unless otherwise specified, all raw material components are commercially available products well known to those skilled in the art.

[0035] In the present invention, the carrier is impregnated and calcined in the salt solution of the modified metal to obtain the carrier loaded with the modified metal; in the present invention, the salt solution of the modified metal is preferably a soluble salt solutio...

Embodiment 1

[0054] Add 1.5 g of activated carbon support to 15.6 mL of RuCl with a concentration of 0.5 g / L 3 solution, stirred for 12h, dried at 80°C for 12h, and the solid powder obtained after drying was placed in H 2 Calcined at 400°C for 4 hours to prepare Ru / C with a loading of 1 wt%, denoted as Ru 1 / C;

[0055] At 30°C, 8.6mL of 10g / L HAuCl 4 Add the solution to 100mL deionized water and sonicate for 10min, then add 10mL of polyvinyl alcohol aqueous solution with a mass concentration of 1wt%, and after sonicating for 10min, then add 10mL of a 7wt% sodium borohydride aqueous solution, sonicate for 30min; add 1g Ru 1 / C, stirred for 3 hours, filtered, washed, and dried at 110°C for 16 hours to obtain Au-Ru with a gold loading of 0.5wt%. 1 / C catalyst, denoted as Au 0.5 Ru 1 / C.

[0056] the Au 0.5 Ru 1 / C Pre-reduction with hydrogen at 250°C for 1h to obtain pretreated Au 0.5 Ru 1 / C;

[0057] 0.1g pretreated Au 0.5 Ru 1 / C and 10mL of wastewater with a pH value of 10 (...

Embodiment 2

[0059] The preparation process of the catalyst refers to Example 1, the only difference is that the concentration of 15.6mL is 0.5g / L RuCl 3 The solution was replaced with 19.8mL concentration of 0.5g / LH 2 PtCl 6 ·6H 2 O solution to prepare Au-Pt / C catalyst, denoted as Au 0.5 Pt 1 / C.

[0060] The catalytic efficiency test refers to Example 1, and the results show that no metal loss is detected after the catalysis is completed, and the conversion rate of ammonia nitrogen in the wastewater is 92.1%, and the removal rate of COD is 90.8%.

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PUM

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Abstract

The invention provides a catalytic wet-type oxidation catalyst, and relates to the field of catalysts. The oxidation catalyst comprises an active component and a carrier, wherein the active componentcomprises Au and a modified metal; the modified metal is one or more of Ru, Rh, Pd, Pt, Fe, Co, Ni and Cu; the mass ratio of Au in the active component to the carrier is (0.01-5.0):(85-100); and the mass ratio of the modified metal in the active component to the carrier is (0.05-10.0):(85-100). The catalytic wet-type oxidation catalyst provided by the invention is used for performing catalytic wetoxidation bio-safety treatment on wastewater, the catalyst has good anti-leakage performance and can simultaneously remove ammonia nitrogen and organic pollutants in the wastewater, and the conversion rate of ammonia nitrogen in the wastewater is greater than 84.3%, and the removal rate of COD is greater than 85.9%.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a catalytic wet oxidation catalyst and its preparation method and application. Background technique [0002] Water is the foundation of life and the environment. However, with the rapid development of the economy, the problem of water pollution has become increasingly prominent, seriously damaging the ecological environment, and there is an urgent need for new and efficient waste water harmless treatment technologies. [0003] At present, the methods for the harmless treatment of wastewater mainly include: biochemical treatment, chemical oxidation, incineration and catalytic wet oxidation. Catalytic wet oxidation has attracted extensive attention due to its wide range of applications and high efficiency. The core of catalytic wet oxidation harmless wastewater treatment technology is catalyst, but the working temperature of existing catalysts is usually >200°C, and under the...

Claims

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Application Information

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IPC IPC(8): B01J23/52B01J23/66B01J23/89C02F1/72C02F101/16C02F101/30
CPCB01J23/52B01J23/66B01J23/8906B01J23/8913B01J23/892B01J23/8926C02F1/725C02F2101/16C02F2101/30
Inventor 张诺伟陈秉辉郭浩哲杨霁豪陈冰冰谢建榕叶松寿郑进保
Owner 厦门顺米可微电子科技有限公司
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