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Degradation of nitrobenzol fomite with catalytic wetting shared oxidative method

A technology of nitrobenzene and co-oxidation, which is applied in the direction of protection devices against harmful chemicals, can solve the problems of mutagenicity, high toxicity, teratogenicity, etc., and achieves reduced energy consumption, high treatment concentration, and increased activity. Effect

Inactive Publication Date: 2009-07-29
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

The production wastewater of these industries contains a large amount of organic pollutants such as nitrobenzene, aniline, and nitrotoluene; these organic pollutants are biologically refractory substances and cannot be directly treated by biochemical methods
In addition, nitrobenzene compounds are highly toxic to humans, easy to accumulate in organisms, and have "three effects" of carcinogenicity, teratogenicity, and mutagenicity

Method used

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  • Degradation of nitrobenzol fomite with catalytic wetting shared oxidative method
  • Degradation of nitrobenzol fomite with catalytic wetting shared oxidative method
  • Degradation of nitrobenzol fomite with catalytic wetting shared oxidative method

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Embodiment 1. Wet oxidation method directly treats nitrobenzene waste water

[0022] Put 200ml of nitrobenzene wastewater solution with a concentration of 100mg / L to 400mg / L into the reactor, and replace it with ultra-pure nitrogen for 3 times (the purpose of replacing with nitrogen is to calculate the reaction time and determine the removal rate benchmark), and then add to the system Fill the medium with ultra-pure nitrogen at a certain pressure, heat up to the specified temperature, then fill with high-purity oxygen of 0.2-5Mpa, stir the reaction solution at a speed of 500 rpm, and react for 1 hour. After the reaction, the nitrobenzene compound The removal rate is shown in Table 1.

[0023] Table 1. The removal rate of nitrobenzene compounds under different reaction conditions

[0024] Reactant Concentrated reactants

[0025] Due to the difference in the substitution position of the hydrocarbon group, the removal rate will be different, mainly due to the i...

Embodiment 2

[0026] Embodiment 2, catalytic wet co-oxidation process nitrobenzene waste water

[0027] The difference from Example 1 is that methanol, ethanol, isopropanol, phenol and aniline are added respectively to the nitrobenzene waste water solution, and a catalyst is added simultaneously (the specific consumption is 0.2-5.0g), and after the reaction, the nitrobenzene The removal rate of similar wastewater is shown in Table 2.

[0028] Table 2. Removal rate of nitrobenzene compounds in catalytic wet co-oxidation system

[0029] Reactant

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Abstract

A process for degradating the nitrobenzene-type pollutants by wet catalytic coxidizing method includes such steps as loading said pollutants into a high-pressure reactor, adding cooxidizing substance and catalyst, and cooxidizing reaction at 100-250 deg.C under 0.5-10 MPa.

Description

technical field [0001] The invention relates to a catalytic wet oxidation method, in particular to a catalytic wet co-oxidation method for degrading nitrobenzene pollutants. Background technique [0002] With the rapid development of industrial technology and the continuous expansion of production scale, various industrial wastewater containing high concentrations of organic pollutants that are difficult to biodegrade are increasing. It is difficult to meet the technical and economic requirements of purification treatment by conventional biochemical methods. As an important industrial raw material, nitrobenzene compounds are mainly used in dyestuffs, medicines, pesticides, explosives and other industries. The production wastewater of these industries contains a large amount of organic pollutants such as nitrobenzene, aniline, and nitrotoluene; these organic pollutants are biologically refractory substances and cannot be directly treated by biochemical methods. In addition, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A62D3/00
Inventor 付冬梅梁鑫淼陈吉平
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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