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Preparation method of alpha-MnO2 catalyst for catalyzing oxidation of volatile organic compounds

An organic compound, volatile technology, applied in the field of α-MnO2 catalyst preparation, can solve the problems of poor stability and water resistance, low reactivity, etc., and achieve good water resistance, good repeatability, and short synthesis cycle. Effect

Active Publication Date: 2020-01-31
HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing manganese oxide catalysts have low reactivity and poor stability and water resistance, and propose a α-MnO catalyst that catalyzes the oxidation of volatile organic compounds. 2 Catalyst preparation method

Method used

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  • Preparation method of alpha-MnO2 catalyst for catalyzing oxidation of volatile organic compounds
  • Preparation method of alpha-MnO2 catalyst for catalyzing oxidation of volatile organic compounds
  • Preparation method of alpha-MnO2 catalyst for catalyzing oxidation of volatile organic compounds

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specific Embodiment approach 1

[0021] Specific implementation mode 1: α-MnO that catalyzes the oxidation of volatile organic compounds in this implementation mode 2 The preparation method of catalyst is carried out according to the following steps:

[0022] 1. Add potassium permanganate to deionized water, perform ultrasonic treatment and magnetic stirring in turn to obtain solution A; solution A is purple;

[0023] 2. Add ethylene glycol to the deionized water, and then adjust the pH value to 7.0-12.0 under the conditions of water bath and magnetic stirring to obtain solution B; solution B is a weakly alkaline transparent solution;

[0024] 3. Add solution A dropwise to solution B, react for 0.5-2 hours in a 20-60°C water bath and stir, then add ethylene glycol, and react in a 20-60°C water bath and stir for 0.5-12h, Obtain suspension C; Suspension C is dark brown;

[0025] Four, filter the suspension C obtained in step 3 to obtain a solid product, wash the solid product repeatedly with deionized water u...

specific Embodiment approach 2

[0031] Embodiment 2: This embodiment differs from Embodiment 1 in that the ratio of the mass of potassium permanganate to the volume of deionized water in step 1 is (1-3) g: (20-50) ml. Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0032] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the ultrasonic treatment time in step 1 is 5-15 minutes. Other steps and parameters are the same as those in the first embodiment.

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Abstract

The invention discloses a preparation method of an alpha-MnO2 catalyst for catalyzing oxidation of volatile organic compounds, relates to the preparation method of the alpha-MnO2 catalyst, and aims tosolve the problems that an existing manganese oxide catalyst is low in reaction activity and poor in stability and water resistance. The preparation method comprises the following steps: preparing apotassium permanganate solution and an ethylene glycol solution with the pH value of 7.0-12.0, mixing, reacting under water bath and stirring conditions, adding ethylene glycol, reacting under water bath and stirring conditions to obtain a turbid liquid, and sequentially filtering, washing, drying and calcining. According to the method, the alpha-MnO2 catalyst is obtained by taking the ethylene glycol as a reducing agent and potassium permanganate as a manganese source for the first time under the condition of room temperature or relatively low temperature, and compared with a traditional high-temperature hydrothermal method and a reflux method, the catalyst disclosed by the invention has the advantages of high activity, high stability and water resistance. The method is suitable for preparing the alpha-MnO2 catalyst.

Description

technical field [0001] The present invention relates to a kind of α-MnO 2 Catalyst preparation method. Background technique [0002] Volatile organic compounds (VOCs), such as benzene, toluene, and xylene emitted from human production and living, are a major class of air pollutants. The emission of VOCs has led to a series of environmental and health problems. Therefore, it is crucial to develop effective technologies and materials to control VOC emissions. At present, adsorption methods, separation methods, biodegradation methods, ozone catalytic oxidation methods, plasma catalytic methods, and photocatalytic methods have been developed for the elimination of VOCs. Among all the strategies, the catalytic oxidation method is considered to be one of the most effective and economical methods. [0003] Currently, noble metal-based materials play an important role in the catalytic oxidation of volatile organic compounds. Although noble metal catalysts such as platinum, palla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01J35/10F23G7/07
CPCB01J23/34F23G7/07B01J35/61
Inventor 宋微娜张天琪董永利赵贾轶白云起魏立国周国江吴鹏解丽萍宋志伟
Owner HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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