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Electrocatalytic oxidation coated electrode for treating oilfield wastewater and preparing method thereof

An electrocatalytic oxidation and coating electrode technology, applied in the field of electrochemistry, can solve the problems of short circuit, easy peeling of electrode coating, deformation of electrode plate, etc.

Inactive Publication Date: 2015-02-25
杭州广联新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The use of electrodes for oily sewage treatment has been studied for a long time, but due to the complex composition of oily sewage in oilfields, traditional electrodes are easily polluted by oil, easy to corrode, and easy to cause short circuits due to plate deformation, etc., and have not been vigorously applied in the field of oilfield water treatment. Promote application
Conventional titanium-based ruthenium-based coated electrodes, titanium-based iridium-based coated electrodes, titanium-based manganese dioxide coated electrodes and titanium-based lead dioxide coated electrodes encounter such and such problems: such as titanium-based manganese dioxide coated electrodes Electrode catalytic activity and corrosion resistance are not as good as titanium-based ruthenium-based coated electrodes and titanium-based iridium-based coated electrodes; titanium-based ruthenium-based coated electrodes and titanium-based iridium-based coated electrodes are expensive, and in actual production, in In the case of oxygen precipitation at the anode, the ruthenium-based coating will be rapidly damaged; and the titanium-based iridium-based coating electrode avoids the above problems due to the low oxygen overpotential, but other properties are not ideal, and the electrode coating is easy to peel off; Due to the large electrodeposition distortion, the lead oxide coated electrode is brittle, difficult to process, low yield, and not suitable for large-scale production; not only the preparation method of the metal oxide coated titanium electrode has a great influence on its actual working performance

Method used

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  • Electrocatalytic oxidation coated electrode for treating oilfield wastewater and preparing method thereof
  • Electrocatalytic oxidation coated electrode for treating oilfield wastewater and preparing method thereof

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preparation example Construction

[0026] The preparation method of a titanium-based coated electrode provided by the present invention includes two main steps:

[0027] Step 1: Apply the coating.

[0028] First, TA1 or TA2 titanium-based materials are selected as the raw material of the plate, and the size of the titanium-based plate is L×d=1500×(700~1000) mm. It is plate-shaped or mesh-shaped, and the mesh grille is diamond-shaped, with specifications of 2×1 mm, 3×6 mm, 3×2 mm, 4.5×12.5 mm, 5×10 mm, 6×10 mm, 5×12 mm, etc. .

[0029] Iridium trichloride (Cl 3 Ru), tantalum chloride (Cl 5 Ta), platinum chloride (Cl 4 Pt 2 ), iridium chloride (IrCl 3 h 2 Any one or more raw materials in O) are mixed in a certain proportion with ethanol as a solvent. After mixing evenly, apply it to the surface of the titanium-based plate with a brush. At the same time, appropriate additives can be added. Additives include but are not limited to Any one or more of manganese dioxide, cobalt oxide, nickel oxide, cobalt nitr...

Embodiment 1

[0043] (1) TA1 is selected as the base material;

[0044] (2) Dilute with ethanol, the mole fraction of Ru is 0.3%, and the mole fraction of La as an additive is 0.2%~0.4%. Apply one layer with a brush as an intermediate layer.

[0045] (3) The manganese dioxide coating was prepared alternately by thermal decomposition method and electrodeposition method to obtain a coating thickness of 20 μm.

[0046] (4) Place the plate flat, dry at 100°C at low temperature, and then sinter at 500°C at high temperature to obtain an electrocatalytic oxidation coating electrode for treating oilfield sewage. The electrode has excellent performance and strong oil pollution resistance.

Embodiment 2

[0048] (1) TA2 is selected as the base material;

[0049] (2) Dilute with ethanol, the mole fraction of Ir is 33%, and the mole fraction of Ta is 10%. Apply one layer with a brush as an intermediate layer.

[0050] (3) Repeat the operation of Example 1 to obtain an electrocatalytic oxidation coating electrode for treating oil field sewage, which has strong oil pollution resistance.

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Abstract

The invention discloses an electrocatalytic oxidation coated electrode for treating oilfield wastewater and a preparing method thereof, wherein the preparing method comprises the following steps: preparing a titanium-based polar plate; mixing arbitrary one or more of iridium trichloride (Cl3Ru), tantalum chloride (Cl5Ta), platinum chloride (Cl4Pt2) and iridium chloride (IrCl3H2O) with ethanol, and after mixing evenly, coating the surface of the titanium-based polar plate with a hair brush; coating the MnO2 surface layer; drying; and sintering at the high temperature to form the titanium-based coated electrode. The electrode having better structural strength can be obtained by the method, and the effective reaction area and the service life of an electrode material are improved. The electrode can effectively remove dispersed oil and emulsified oil in the oily wastewater, can overcome the disadvantage that a common electrode lose efficacy because of being easily polluted by oil stain, can be widely and effectively applied to the fields of oilfield wastewater treatment and reinjection and the like, has the advantages of good treatment effect, good oil pollution resistance performance, small electrode loss, simple preparation method and operation, and good reproducibility, and is suitable for large-scale production and popularization.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to a metal oxide-coated titanium-based electrode for oily sewage treatment and a preparation method thereof. Background technique [0002] With the rapid development of the petrochemical industry, titanium-based coated electrodes have emerged as the times require, and are widely used in many industries such as chemical industry, environmental protection, water electrolysis, water treatment, electrometallurgy, and electroplating. Titanium as the base material has a stable oxide layer protection, so it has good durability and stability under the condition of brine electrolysis. Metal titanium can be mechanically processed at will, and can be used to make titanium plates, titanium rods, titanium wires, titanium meshes, titanium tubes, porous plates, etc., which are widely used. [0003] Titanium electrodes coated with metal oxides showed incomparably excellent...

Claims

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Application Information

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IPC IPC(8): C02F1/461C02F1/463C02F1/40C02F1/72
CPCC02F1/40C02F1/46109C02F1/463C02F1/72C02F2001/46138C02F2101/32
Inventor 董滨林树森林升耀彭友新
Owner 杭州广联新能源科技有限公司
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