Preparation method for nanometer magnesium oxide ozone catalyst and advanced treatment method for catalytically oxidizing wastewater of coal chemical industry by using catalyst

A nano-magnesium oxide, catalytic oxidation technology, applied in the direction of oxidized water/sewage treatment, physical/chemical process catalyst, water/sewage treatment, etc., can solve the secondary pollution metal oxide catalyst catalytic effect, homogeneous catalyst cannot be recycled and repeated Utilization, easy loss of active components and other issues, to achieve the effect of low magnesium ion dissolution, low toxicity, and small adsorption performance

Inactive Publication Date: 2017-12-08
HARBIN INST OF TECH
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention solves the problems of easy loss of active components in the traditional magnesia preparation method, slow oxidation rate and low mineralization rate when ozone alone removes pollutants, inability to recycle and reuse homogeneous catalysts, introd

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  • Preparation method for nanometer magnesium oxide ozone catalyst and advanced treatment method for catalytically oxidizing wastewater of coal chemical industry by using catalyst
  • Preparation method for nanometer magnesium oxide ozone catalyst and advanced treatment method for catalytically oxidizing wastewater of coal chemical industry by using catalyst
  • Preparation method for nanometer magnesium oxide ozone catalyst and advanced treatment method for catalytically oxidizing wastewater of coal chemical industry by using catalyst

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specific Embodiment approach 1

[0033] Specific embodiment one: the preparation method of a kind of nano magnesium oxide ozone catalyst of the present embodiment carries out according to the following steps:

[0034] 1. MgCl 2 Add it into water, stir to dissolve it, and prepare MgCl with a concentration of 0.05mol / L~0.15mol / L 2 solution;

[0035] Two, the concentration obtained in step one is the MgCl of 0.05mol / L~0.15mol / L 2 Add a dispersant to the solution, react at room temperature and a stirring speed of 150r / min to 250r / min, and the reaction time is 40min to 80min to obtain a mixture solution;

[0036] Dispersant described in step 2 and MgCl described in step 1 2 The mass ratio is 0.5~1.5:100;

[0037] 3. Add NaOH solution dropwise at a rate of 0.5mL / min to 1.5mL / min to the mixture solution obtained in step 2, and age for 20h to 24h;

[0038] The amount of the substance of NaOH in the NaOH solution described in step 3 and the MgCl described in step 1 2 The ratio of the amount of substance is 0.4~0...

specific Embodiment approach 2

[0042]Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that in step 1, MgCl with a concentration of 0.1 mol / L is formulated 2 solution. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0043] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the dispersant in step 2 is polyvinyl alcohol. Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a preparation method for a nanometer magnesium oxide ozone catalyst and an advanced treatment method for catalytically oxidizing wastewater of coal chemical industry by using the catalyst. The invention belongs to the technical field of wastewater treatment and environmental catalysis and specifically relates to the preparation method for the nanometer magnesium oxide ozone catalyst and the advanced treatment method for catalytically oxidizing wastewater of coal chemical industry by using the catalyst. The invention aims to solve the problems of the traditional preparation method for magnesium oxide that the active components are easy to lose, the oxidizing rate and the mineralization rate are both low when the ozone is singly used for removing the pollutants, the homogeneous catalyst cannot be reused, the secondary pollution is introduced and the catalytic effect of the metallic oxide catalyst is unstable. The preparation method for the catalyst comprises the following steps: 1) preparing MgCl2 solution; 2) adding a dispersing agent; 3) dropping NaOH solution for ageing; 4) washing; and 5) drying. The water treatment method comprises the following steps: 1) adding the nanometer magnesium oxide ozone catalyst; and 2) introducing the ozone for performing catalytic oxidation reaction, thereby completing the advanced treatment for the wastewater of coal chemical industry.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment and environmental catalysis, and in particular relates to a preparation method of a nano-magnesium oxide ozone catalyst and an advanced treatment method for catalyzing and oxidizing coal chemical industry waste water. Background technique [0002] In recent years, with the rapid development of my country's chemical industry, a large number of organic pollutants have entered water bodies through various channels, and some of them are difficult to biodegrade and remove, which poses a serious threat to both human beings and the environment. Wastewater discharged by coal chemical enterprises is produced during the coal processing process, including gasification wastewater, liquefaction wastewater and coking wastewater, mainly high-concentration coal gas washing wastewater. The water quality of the wastewater is complex, containing a large amount of phenols, polycyclic aromatic compounds ...

Claims

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Application Information

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IPC IPC(8): B01J21/10B01J35/02C02F1/78C02F103/34
CPCB01J21/10B01J35/023C02F1/725C02F1/78C02F2103/34
Inventor 韩洪军朱昊徐春艳麻薇薇韩宇星
Owner HARBIN INST OF TECH
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