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Wastewater catalyst for treating small organic molecules and preparation method thereof

A catalyst and small molecule technology, which is applied in the field of wastewater catalysts for the treatment of small organic molecules and their preparation, can solve the problems of difficulty in degrading small organic molecules and the investigation of stability, and achieves low operating costs, low production costs, and catalytic stability. Good results

Active Publication Date: 2018-01-02
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are few studies on organic small molecule wastewater, but the treatment of organic small molecules is a crucial link in industrial wastewater treatment, especially at low concentrations, it is also a difficult problem to effectively degrade organic small molecules
In addition, the current research on catalysts for catalytic wet oxidation has almost no investigation on stability, but stability is very important in industrial applications

Method used

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  • Wastewater catalyst for treating small organic molecules and preparation method thereof
  • Wastewater catalyst for treating small organic molecules and preparation method thereof
  • Wastewater catalyst for treating small organic molecules and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: Ru / Ni 0.2 Zr 0.1 Ce 0.7 o 2 resolve resolution

[0030] 1) Weigh 0.23g of Ni(NO 3 ) 2 ·6H 2 O, 0.17g of Zr(NO 3 ) 4 ·5H 2 O and 1.22g of Ce(NO 3 ) 3 ·6H 2 O, dissolved in 100mL water together, stirred for 0.5h to obtain a mixed solution;

[0031] 2) According to the molar ratio of sodium hydroxide and the total molar number of metal ions of Ni, Zr and Ce in step 1) being 2 to 12:1, take 1.5 g of sodium hydroxide and dissolve it in 50 mL of water to obtain lye Wherein, step 1) in Ni, Zr, the metal ion total molar number of Ce and step 1) in the preparation mixed solution water volume, step 2) in the formula ratio of the water volume sum of the preparation lye used water volume sum is about 0.004mol: 150mL, the ratio of the volume of water used to prepare the mixed solution in step 1) to the volume of water used to prepare the lye in step 2) is 2:1; and the amount of sodium hydroxide can make the mixed solution of step 1) and the alkali of step 2) ...

Embodiment 2

[0036] Example 2: Ru / Ni 0.3 Zr 0.1 Ce 0.6 o 2 resolve resolution

[0037] 1) Weigh 0.35g of Ni(NO 3 ) 2 ·6H 2 O, 0.17g of Zr(NO 3 ) 4 ·5H 2O and 1.04g of Ce(NO 3 ) 3 ·6H 2 O, dissolved in 100mL water together, stirred for 0.5h to obtain a mixed solution;

[0038] 2) According to the molar ratio of sodium hydroxide and the total molar number of metal ions of Ni, Zr and Ce in step 1) being 2 to 12:1, take 1.5 g of sodium hydroxide and dissolve it in 50 mL of water to obtain lye Wherein, step 1) in Ni, Zr, the metal ion total molar number of Ce and step 1) in the preparation mixed solution use water volume, step 2) in the preparation ratio of the formula ratio of the use water volume sum of alkali lye is about 0.004mol: 150mL, the ratio of the volume of water used to prepare the mixed solution in step 1) to the volume of water used to prepare the lye in step 2) is 2:1; and the amount of sodium hydroxide can make the mixed solution of step 1) and the alkali of step 2)...

Embodiment 3

[0043] Example 3: Ru / Ni 0.4 Zr 0.1 Ce 0.5 o 2 resolve resolution

[0044] 1) Weigh 0.46g of Ni(NO 3 ) 2 ·6H 2 O, 0.17g of Zr(NO 3 ) 4 ·5H 2 O and 0.87g of Ce(NO 3 ) 3 ·6H 2 O, dissolved in 100mL water together, stirred for 0.5h to obtain a mixed solution;

[0045] 2) According to the molar ratio of sodium hydroxide and the total molar number of metal ions of Ni, Zr and Ce in step 1) being 2 to 12:1, take 1.5 g of sodium hydroxide and dissolve it in 50 mL of water to obtain lye Wherein, step 1) in Ni, Zr, the metal ion total molar number of Ce and step 1) in the preparation mixed solution use water volume, step 2) in the preparation ratio of the formula ratio of the use water volume sum of alkali lye is about 0.004mol: 150mL, the ratio of the volume of water used to prepare the mixed solution in step 1) to the volume of water used to prepare the lye in step 2) is 2:1; and the amount of sodium hydroxide can make the mixed solution of step 1) and the alkali of step 2...

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Abstract

The invention discloses a waste water catalyst for treating small organic molecules and a preparation method thereof. The catalyst comprises a carrier and catalytic components loaded on the carrier. The catalyst carrier of the present invention adopts AxByC1-x-yO2 type composite metal oxide, wherein A is one of Fe, Co, Ni, Cu, B is one of W, Mn, Mo, Zr, and C is La, Ce One of the rare earth elements. The catalytic active center is dominated by noble metals, and the noble metal elements account for 0.1-1wt% of the total mass of the catalyst. When in use, add waste water into the autoclave, add the above-mentioned catalyst at a ratio of 2-12g / L, use air as an oxidant, and remove small organic molecules through an oxidation reaction. The reaction temperature is 40-80°C and the reaction pressure is 0.5-2Mpa. The method of the invention has mild reaction conditions, the TOC degradation rate can reach more than 80%, and the stability is excellent, and is especially suitable for treating waste water containing small organic molecules such as formaldehyde, formic acid, and methanol.

Description

technical field [0001] The invention belongs to the technical field of industrial wastewater treatment, and in particular relates to a wastewater catalyst for treating small organic molecules and a preparation method thereof. Background technique [0002] Industrial wastewater often contains a variety of high-concentration, toxic, and dangerous organic substances. If it is not treated and discharged directly, it will cause serious environmental pollution. Catalytic wet oxidation technology has been used more and more in recent years. Since this method can completely convert organic matter into carbon dioxide and water, the application of this technology is considered to be one of the most effective methods for treating industrial wastewater. Organic small molecule wastewater is a relatively common intermediate product in sewage, such as formic acid, formaldehyde, and methanol. These small molecules are often produced when organic matter is treated. At present, there are few...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89C02F1/74C02F101/30C02F101/34
Inventor 陈秉辉王子丹彭晓芳张诺伟郑进保
Owner XIAMEN UNIV