Preparation method and application of MNO2 catalyst for deep mineralization of phenol wastewater at room temperature

A kind of catalyst, deep technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve problems such as high equipment requirements and complex processes, and achieve application prospects Extensive, easy-to-use, easy-to-repeat effects

Active Publication Date: 2019-06-18
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a kind of MnO that is used for normal temperature deep mineralization phenol waste water 2 The preparation method and application of the catalyst, aiming at the complex process in the prior art and the high requirements on the equipment, the MnO 2 The catalyst preparation process is improved to simplify the process and reduce production costs

Method used

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  • Preparation method and application of MNO2 catalyst for deep mineralization of phenol wastewater at room temperature
  • Preparation method and application of MNO2 catalyst for deep mineralization of phenol wastewater at room temperature
  • Preparation method and application of MNO2 catalyst for deep mineralization of phenol wastewater at room temperature

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preparation example Construction

[0031] The MnO used in the deep mineralization of phenol wastewater at normal temperature proposed by the present invention 2 The preparation method of catalyst comprises the following steps:

[0032] (1) Potassium permanganate and reduction auxiliary agent are mixed, the mass ratio of mixing is: potassium permanganate: reduction auxiliary agent=1: (0.1-0.6), add deionized water 70mL-100mL in the mixture, make the mixture The mass volume concentration is 5.0-10.769g / L, obtains a suspension, and the described reduction auxiliary agent is manganese sulfate monohydrate or ammonium oxalate monohydrate;

[0033] (2) Place the suspension in the above step (1) in a hydrothermal reaction vessel or a water bath reaction vessel, react for 12 hours at 80-200 degrees Celsius, and after the solution is cooled to room temperature, carry out centrifugation, and use deionized water washing the solid obtained by centrifugation;

[0034] (3) Heating the solid in the above step (3) to 90-120 d...

Embodiment 1

[0042] (1) 1.0g potassium permanganate is mixed with 0.15g manganese sulfate monohydrate, and 70mL deionized water is added thereto to obtain a suspension;

[0043] (2) Place the suspension in the above step (1) in a hydrothermal reaction vessel or a water bath reaction vessel, react at 200 degrees Celsius for 12 hours, cool the solution to room temperature, then centrifuge, wash and centrifuge with deionized water isolated solid;

[0044] (3) Heat the solid in the above step (2) to 105 degrees Celsius, keep it warm for 24 hours, and obtain 001 crystal face MnO with the ability to mineralize phenol wastewater at atmospheric pressure after natural cooling 2 catalyst.

[0045] Adopt U.S. Rigaku D / max-2400 type X-ray diffractometer to test the MnO prepared by Example 1 2 The crystal structure of the catalyst is as figure 1 The XRD pattern shown. It can be seen from the spectra that MnO 2 The crystallinity is not very good, the peaks at 12.3°, 24.6°, 36.5° and 65.5° are simil...

Embodiment 2

[0047] (1) 1.0g potassium permanganate and 0.3g manganese sulfate monohydrate are mixed, and 100mL deionized water is added thereto to obtain a suspension;

[0048] (2) Place the suspension in the above step (1) in a hydrothermal reaction vessel or a water bath reaction vessel, react at 200 degrees Celsius for 15 hours, cool the solution to room temperature, then centrifuge, wash and centrifuge with deionized water isolated solid;

[0049] (3) Heat the solid in the above step (2) to 100 degrees Celsius, keep it warm for 30 hours, and naturally cool to obtain 001 crystal face MnO with the ability to mineralize phenol wastewater at atmospheric pressure. 2 catalyst.

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Abstract

The invention relates to a preparation method of a MnO2 catalyst for further mineralizing phenolic waste water at normal temperature, which belongs to the technical field of thermal catalytic materials. The preparation method comprises the following steps: firstly mixing potassium permanganate and reducing adjuvant to obtain turbid liquid, reacting for 10 to 15 hours at the temperature of 180 to 250 DEG C, naturally cooling, thus obtaining the MnO2 catalyst with further mineralization capacity. The MnO2 catalyst prepared by the method of the invention has excellent activity for further mineralizing the phenolic waste water; and moreover, the preparation method provided by the invention is cheap in raw materials and simple, thereby effectively decreasing the product cost, having great environmental protection value, and having high practical value and application prospect.

Description

technical field [0001] The invention relates to a kind of MnO used for deep mineralization of phenol wastewater at normal temperature 2 The preparation method and application of the catalyst belong to the technical field of thermal catalytic materials. Background technique [0002] Phenolic wastewater is one of the most harmful and widely polluting industrial wastewater in the world today. Therefore, how to treat phenol-containing wastewater reasonably and effectively is an important problem in environmental protection. The methods for treating phenolic wastewater include physical and chemical treatment, biochemical treatment and chemical treatment. Among them, among the chemical treatment methods, there are many researches on catalysts applied to the wet oxidation method under high temperature and high pressure, and many of them have been industrialized. However, the catalytic oxidation technology under normal temperature and pressure is still immature, and there are rel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G45/02B01J23/34C02F1/72C02F101/34
CPCB01J23/34C01G45/02C01P2002/72C01P2004/03C01P2004/04C02F1/722C02F1/725C02F2101/345C02F2305/023
Inventor 朱永法杨文娟尤飞闫龙马亚军卢翠英马向荣高平强
Owner TSINGHUA UNIV
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