Method oxidation degradating m-nitrobenzene sodium sulfonate by catalytic wet method

A technology of sodium nitrobenzene sulfonate, catalytic wet oxidation, applied in chemical instruments and methods, oxidized water/sewage treatment, physical/chemical process catalysts, etc., can solve the problems of reduced hydrogen peroxide production cost and high treatment cost , to achieve high practicability and application value, high processing efficiency, and short time-consuming effects

Inactive Publication Date: 2007-07-18
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the catalytic wet oxidation using hydrogen peroxide as an oxidant has high treatment costs due to the large amount of hydrogen peroxide used, this method is an expedient, practical, flexible and effective treatment method for some high-concentration toxic and harmful wastewater. Moreover, due to the improvement of the production process of hydrogen peroxide in recent years, the production cost of hydrogen peroxide has been further reduced, which makes the exploration of hydrogen peroxide degrading some refractory industrial wastewater under certain conditions gradually developed, and a series of achievements have been made. progress

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  • Method oxidation degradating m-nitrobenzene sodium sulfonate by catalytic wet method
  • Method oxidation degradating m-nitrobenzene sodium sulfonate by catalytic wet method
  • Method oxidation degradating m-nitrobenzene sodium sulfonate by catalytic wet method

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Experimental program
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Effect test

Embodiment 1

[0040] Add 500 mL of sodium m-nitrobenzenesulfonate solution (initial TOC: 2560 mg / L) containing 1.0 g of copper nitrate and 25 mL of hydrogen peroxide into a 1 L reaction vessel, and seal it. Introduce 500mL of oxygen with an initial pressure of 1.0MPa, set the temperature at 180°C, stir, heat the reaction, take a sample after 1 hour of reaction, continue to heat up after sampling, and start timing when the temperature reaches 200°C, continue to react after 1 hour Sampling, reaction sampling at 220°C, 240°C, and 260°C in turn, using a total organic carbon analyzer (model TOC-V) produced by Shimadzu Corporation of Japan CPH ) to measure total organic carbon (TOC).

[0041] The measurement results are shown in the table:

[0042] Table 1 Sample treatment effect under different temperature conditions

[0043] temperature reflex

[0044] It can be seen from the above table that as the temperature increases and the time prolongs, the total organic carbon (TOC) of the ...

Embodiment 2

[0046] Add 500 mL of sodium m-nitrobenzenesulfonate solution (TOC: 2560 mg / L) containing 1.0 g of copper nitrate and 30 mL of hydrogen peroxide into the reaction kettle, and seal it. Introduce 500mL of oxygen with an initial pressure of 1.0MPa, set the temperature at 180°C, stir, heat and react, and take out the treatment liquid from the sampling valve at different time periods. The sampling time is set to 10 minutes, 20 minutes, 40 minutes, 60 minutes Minutes, 80 minutes, with a total organic carbon analyzer (model TOC-V) produced by Shimadzu Corporation of Japan CPH ) to measure total organic carbon (TOC). Change the reaction temperature to repeat the experiment, and select 200°C, 220°C, 240°C, 260°C to investigate the relationship between the removal rate and the reaction temperature. When the temperature is 180°C, the TOC removal rate is 87.26% after 80 minutes of reaction; when the temperature rises to 200°C, the TOC removal rate is 89.07% after 80 minutes of reaction; a...

Embodiment 3

[0049] Add 500 mL of sodium m-nitrobenzenesulfonate solution (TOC: 2560 mg / L) containing 1.0 g of copper nitrate and 30 mL of hydrogen peroxide into the reaction kettle, and seal it. Introduce 500mL of oxygen with an initial pressure of 1.0MPa, set the temperature at 200°C, stir, heat and react, and take out the treatment liquid from the sampling valve at different time periods, and set the sampling time as 10 minutes, 20 minutes, 40 minutes, 60 minutes Minutes, 80 minutes, with a total organic carbon analyzer (model TOC-V) produced by Shimadzu Corporation of Japan CPH ) to measure total organic carbon (TOC). Change the consumption of reaction copper nitrate catalyst, be selected as 0.5g, 1.5g, 2.0g, 3.0g. Investigate the relationship between removal rate and catalyst dosage. After 80 minutes of reaction, when no catalyst was added, the corresponding catalytic wet oxidation process removed m-nitrobenzene sulfonate with a removal rate of 86.23%; when adding 0.5 gram of cataly...

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Abstract

This invention discloses a method of catalysis wet process oxygenizing and degrading sodium metanitrobenzene sulphonate, which relates to industry nickel decoating waste water. It belongs to catalytic oxidation technique domain. Add sodium metanitrobenzene sulphonate solution which has certain TOC density in reactor, of which volume is 11. Add hydrogen dioxide and oxygen as oxidizing agent, add cupric nitrate as catalytic agent, seal up; import oxygen of which incipient pressure is 0.1-15MPa, mix, heat to 150-300deg, degrade, react 0.5h-2.5h, cool, process to finish, measure total organic carbon. After 30 minutes, removal rate of total organic carbon is 95.94%; After 2 hours, removal rate of total organic carbon is 96.51 %.

Description

technical field [0001] The invention belongs to the technical field of catalytic oxidation, and specifically provides a method for catalytic wet oxidation degradation of sodium m-nitrobenzenesulfonate in industrial nickel deplating wastewater related to environmental protection technology. technical background [0002] Electroplating avoids huge economic losses caused by metal corrosion, so it is widely used in machine manufacturing, light industry, electronics and other industries. The deplating wastewater generated during the nickel electroplating operation is a kind of harmful wastewater, and its chemical oxygen demand (COD for short) can reach up to 80000mg / L. Wastewater contains high concentrations of organic matter, mainly sodium m-nitrobenzene sulfonate (molecular formula C 6 h 4 NNaO 5 S), sodium m-aminobenzenesulfonate (molecular formula is NH 2 C 6 h 4 SO 3 Na) and other substances, the concentration of sodium m-nitrobenzenesulfonate is about 10-50g / L, and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72B01J27/25C02F101/38
Inventor 李鱼董国华刘建林刘亮王健赵文晋王宪恩
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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