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Method for treating methanol and formaldehyde industrial wastewater by electrocatalytic oxidation

A technology for electrocatalytic oxidation and industrial wastewater, applied in chemical instruments and methods, water/sludge/sewage treatment, sterilization/microdynamic water/sewage treatment, etc. Formaldehyde wastewater treatment difficulty and other issues, to achieve the effect of low cost, stable properties, and convenient operation

Inactive Publication Date: 2018-03-30
南京桐纳新材料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Research on the treatment of wastewater containing methanol and formaldehyde has attracted more and more attention from scientific researchers, especially the formaldehyde solution is a true solution, and the coagulation process is difficult to achieve degradation effects, thus increasing the difficulty of formaldehyde wastewater treatment

Method used

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  • Method for treating methanol and formaldehyde industrial wastewater by electrocatalytic oxidation
  • Method for treating methanol and formaldehyde industrial wastewater by electrocatalytic oxidation
  • Method for treating methanol and formaldehyde industrial wastewater by electrocatalytic oxidation

Examples

Experimental program
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Effect test

Embodiment 1

[0026] (1) Etch the porous titanium tube with an outer diameter of 30 mm, a thickness of 2.5 mm, and a length of 200-1000 mm with a mixed solution of acid and alcohol, take it out, ultrasonically clean it, dry it in an oven, and set it aside;

[0027] (2) The germanium bismuth lanthanum coated electrode was prepared by impregnation and coating pyrolysis method. An electrode coating solution A of Ge:Bi:La=100:X:Y (molar ratio) is prepared with a low-carbon alcohol solution as a solvent, wherein the value of X is 1-40, and the value of Y is 1-15. Immerse the etched porous titanium tube in solution A for 1.6 minutes at room temperature, dry the surface solvent in an oven, and calcinate in a heating furnace at 300-500°C for 60 minutes; repeat 5 times;

[0028] (3) Loading TiO by sol-gel method 2 The substrate is the cathode, and a low-carbon alcohol solution is used as the solvent to add a titanium source to prepare a uniform and transparent sol, and then brush coating and therma...

Embodiment 2

[0040] (1) The porous titanium tube with an outer diameter of 30 mm, a thickness of 2.5 mm, and a length of 200-1000 mm is etched with a mixed solution of acid and alcohol, taken out, ultrasonically cleaned, dried in an oven, and set aside;

[0041] (2) The germanium bismuth lanthanum coated electrode was prepared by impregnation method and coating pyrolysis method. Using low-carbon alcohol solution as a solvent, prepare electrode coating solution A with Ge:Bi:La=100:X:Y (molar ratio), wherein the value of X is 1-40, and the value of Y is 1-15. Immerse the etched titanium film substrate in the above-prepared solution A, immerse at room temperature for 1 min, dry the surface solvent in an oven, and calcinate in a heating furnace at 300-500 ° C for 60 min; repeat 5 times;

[0042] (3) The electrode prepared by the above process is used to electrochemically treat wastewater containing methanol and formaldehyde. The anode is the above-mentioned porous titanium-based catalytic acti...

Embodiment 3

[0048] (1) The porous titanium mesh with a length of 8-10 cm, a width of 8-10 cm, and a thickness of 2.5 mm was etched in a constant temperature water bath with a mixed solution of acid and alcohol for a certain period of time, and then ultrasonically cleaned after taking it out, and carried out in an oven. dry, ready for use;

[0049] (2) The nickel-cobalt coated electrode was prepared by impregnation method and coating pyrolysis method. Using low-carbon alcohol as a solvent, prepare electrode coating solution B with Ni:Co=90:Z (molar ratio), where Z value is 1-20. Soak the etched porous titanium mesh in the above preparation solution B, soak for 2 minutes at room temperature, dry the surface solvent in an oven, and calcinate in a heating furnace at 400°C for 60 minutes; repeat 5 times;

[0050] (3) Use the electrode prepared by the above process to electrochemically treat wastewater containing methanol and formaldehyde. The anode is a porous titanium-based catalytic active ...

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Abstract

The invention discloses a method for electrocatalytic oxidation treatment of industrial wastewater containing methanol and formaldehyde. An active oxide coating electrode with electrocatalytic function is used for electrocatalytic oxidation treatment of industrial wastewater containing methanol and formaldehyde. Operating process conditions: the operating voltage is 3~100V, current 0.01A / cm2~2.60A / cm2. The invention has the advantages of simple treatment process, convenient operation, stable performance, high efficiency, low power consumption, less investment and low cost. The coating electrode has stable properties and has a good application prospect in the field of treating such industrial wastewater and recycling. The COD content in the water after wastewater treatment in the production of methanol and formaldehyde series products can be reduced to less than 30 mg / L, and the pH value after treatment is neutral, which can make the wastewater treatment in the production of methanol and formaldehyde series products reach recycling recycling The quality requirements stipulated by the national and chemical industry standards used.

Description

technical field [0001] The invention relates to a method for treating methanol and formaldehyde industrial wastewater by electrocatalytic oxidation, which is used for treating the industrial wastewater produced in the production of methanol and formaldehyde series products. Background technique [0002] Methanol and formaldehyde series products are one of the organic chemical raw materials with wide application, complex production process and sufficient supply of raw materials. In 2014, the output of methanol in my country was 37.407 million tons, and the apparent consumption reached 40.99 million tons. The largest amount of organic chemical raw materials; Methanol production process will inevitably produce methanol-containing wastewater. Methanol has a toxic effect on the central nervous system, optic nerve, and retina of the human body, and may even cause poisoning, coma, blindness, and even death. Formaldehyde is mainly used in the plastic industry, synthetic fiber, leathe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/467C02F101/34
Inventor 周幸福张也贤贺五洲
Owner 南京桐纳新材料科技有限公司
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