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Preparation method and application of catalyst for organophosphorus pesticide production wastewater

A technology for organophosphorus pesticides and wastewater production, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc. Increased operating costs and other issues to achieve the effect of high catalytic activity, low requirements for equipment material selection, and reduced input costs

Pending Publication Date: 2021-09-28
重庆南科环工环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, in the process of treating high COD wastewater, the treatment conditions all involve high temperature (300°C-1000°C) and high pressure (0.1MPa-6MPa). Due to the high temperature and high pressure involved, not only the operation risk factor is high, the safety hazard is great, but also the equipment The material requirements are high, which makes the initial investment cost high, and increases the operating cost during operation

Method used

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  • Preparation method and application of catalyst for organophosphorus pesticide production wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1, the preparation one of catalyst

[0031] S1: Preparation of the carrier: select 100 g of diatomite that has not been calcined at high temperature, stir in 2-3 times the mass of deionized water at room temperature for 1 hour, stir evenly, and then filter with suction to obtain a solid, and put the filtered solid at 70 Under the condition of ℃, bake for 1H, dry, and set aside;

[0032] S2: Preparation of the precursor: select the inorganic salt of Cu and Mn, put the inorganic salt of 10g Cu and the inorganic salt of 20g Mn in the water-polyethylene glycol solution and stir well, after stirring evenly, adjust the pH of the mixed solution to 5-7, again at room temperature, mechanical stirring for 1H, after the stirring is completed, at room temperature, ultrasonication for 3H, after the ultrasonication is completed, the mixed solution is recrystallized at 70-100°C, and after the recrystallization is completed, Centrifuge again to obtain a recrystallized solid...

Embodiment 2

[0034] Embodiment 2, the preparation two of catalyst

[0035] S1: Preparation of the carrier: select 120 g of diatomite that has not been calcined at high temperature, stir in 2-3 times the mass of deionized water at room temperature for 2 hours, stir evenly, and then suction filter to obtain a solid, which is filtered at 60 Bake at ℃ for 1.5H, after drying, set aside;

[0036] S2: Preparation of the precursor: select inorganic salts of Mn and Ce, place 13g of Mn inorganic salts and 20g of Ce inorganic salts in water-polyethylene glycol solution and stir well, and adjust the pH of the mixed solution to 5- 7. Stir mechanically for 2 hours at room temperature again. After the stirring is completed, ultrasonicate for 5 hours at room temperature. After ultrasonication is completed, recrystallize the mixed solution at 70-100°C. After the recrystallization is completed, centrifuge again. Separation to obtain a recrystallized solid, drying the solid at 50-70°C, placing the solid in ...

Embodiment 3

[0038] Embodiment 3, the preparation three of catalyst

[0039] S1: Preparation of the carrier: select 150 g of diatomite that has not been calcined at high temperature, stir in deionized water with 2-3 times the mass for 3 hours at room temperature, stir evenly, and then filter with suction to obtain a solid, and put the filtered solid at 70 Bake at ℃ for 1H, after drying, set aside;

[0040] S2: Precursor preparation: select inorganic salts of Cu and Ce, place 12g of Cu inorganic salts and 25g of Ce inorganic salts in water-polyethylene glycol solution and stir well, and adjust the pH of the mixed solution to 5- 7. Stir mechanically for 3 hours at room temperature again. After the stirring is completed, ultrasonicate for 7 hours at room temperature. After ultrasonication is completed, recrystallize the mixed solution at 70-100°C. After the recrystallization is completed, centrifuge again. Separation to obtain a recrystallized solid, drying the solid at 50-70°C, placing the ...

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Abstract

The invention relates to the technical field of wastewater treatment, in particular to a preparation method and application of a catalyst for organophosphorus pesticide production wastewater, and the preparation method comprises the following steps: S1, preparation of a carrier: selecting diatomite which is not calcined at high temperature, uniformly stirring in deionized water at room temperature, then carrying out suction filtration to obtain a solid, and drying the solid subjected to suction filtration for later use; s2, preparation of a precursor: selecting a proper active metal inorganic salt, fully combining the active metal inorganic salt in a water-organic solvent solution, performing high-temperature activation, and naturally cooling to obtain the precursor for later use; and S3, preparing the catalyst. The invention aims to provide the preparation method and the application of the catalyst for the organophosphorus pesticide production wastewater, the treatment temperature of COD can be effectively reduced and the requirements on equipment can be reduced in the evaporation and concentration process of the high-COD wastewater, thereby reducing the operation cost in the treatment process of the high-COD wastewater.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a preparation method and application of a catalyst for organophosphorus pesticide production wastewater. Background technique [0002] Energy crisis and ecological problems are the two major restrictive factors of scientific and technological progress and human development. In the face of the current high-pressure environmental protection policy, various fields and industries are forced to continuously increase their investment in environmental protection. Active metals (noble metals or rare earth metals) have been continuously researched and developed into various forms of highly active catalysts, and a large number of reports have been used in the field of air pollution control, such as photocatalysts, high-temperature flameless combustion catalysts, etc. However, there are relatively few research reports on the application of active metal catalysts in the process...

Claims

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Application Information

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IPC IPC(8): B01J23/34B01J23/83B01J23/889C02F1/04C02F101/30
CPCB01J23/8892B01J23/34B01J23/83C02F1/048C02F2101/306
Inventor 蒲桃周红军付振程马小军唐华王一恒
Owner 重庆南科环工环保科技有限公司