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A kind of preparation method of sodium hypochlorite generator electrode

A sodium hypochlorite and generator technology, applied in electrodes, electrolysis components, electrolysis processes, etc., can solve the problems of reduced electrode current efficiency, poor conductivity of inert films, and difficulty in meeting industrial applications, achieving long service life, low chlorine evolution potential, The effect of improving oxygen evolution potential and service life

Active Publication Date: 2019-02-12
AWS ENVIRONMENT TECH LTD
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Problems solved by technology

Although this method improves the adhesion between the titanium substrate and the coating, the inert film has poor conductivity and poor oxygen penetration resistance, resulting in reduced current efficiency and poor corrosion resistance of the electrode, which increases the power consumption and salt consumption of the sodium hypochlorite generator. The short service life of electrodes is not conducive to energy saving and consumption reduction
[0005] Patent CN02804636.6 Electrode coating and its use and preparation method discloses an electrode coating for preparing sodium hypochlorite and its preparation method. The biggest problem is that the service life of the electrode is low and it is difficult to meet industrial applications.

Method used

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  • A kind of preparation method of sodium hypochlorite generator electrode

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preparation example Construction

[0041] A kind of preparation method of sodium hypochlorite generator electrode, comprises the following steps:

[0042] 1) Use a titanium plate with a titanium content of 99.9% and a thickness of 1 mm as the substrate. After the titanium plate is sandblasted and polished to remove the oxide layer, it is placed in a NaOH solution with a concentration of 10% and shaken for 30 minutes, and then the oxalic acid solution with a concentration of 20% is used. Etch the titanium plate for 2 hours, wash it and place it in an ethanol solution for use;

[0043] 2) Preparation of active coating solution for the inner layer: use a mixed solution of n-butanol and isopropanol as a solvent, the volume ratio of n-butanol and isopropanol is 2:1, use ruthenium trichloride, chloroiridic acid, titanic acid Tetrabutyl ester and oxygen evolution inhibitor are used as solute, and concentrated hydrochloric acid is used as a stabilizer to form an inner layer active coating solution; the metal ion concen...

Embodiment 1a

[0072] A kind of preparation method of sodium hypochlorite generator electrode, comprises the following steps:

[0073] 1) Use a titanium plate with a titanium content of 99.9% and a thickness of 1 mm as the substrate. After the titanium plate is sandblasted and polished to remove the oxide layer, it is placed in a NaOH solution with a concentration of 10% and shaken for 30 minutes, and then the oxalic acid solution with a concentration of 20% is used. Etch the titanium plate for 2 hours, wash it and place it in an ethanol solution for use;

[0074] 2) Preparation of active coating solution for the inner layer: use a mixed solution of n-butanol and isopropanol as a solvent, the volume ratio of n-butanol and isopropanol is 2:1, use ruthenium trichloride, chloroiridic acid, titanic acid Tetrabutyl ester and oxygen evolution inhibitor are used as solute, and concentrated hydrochloric acid is used as a stabilizer to configure an inner layer active coating solution; the metal ion c...

Embodiment 1b

[0082] A kind of preparation method of sodium hypochlorite generator electrode, comprises the following steps:

[0083] 1) Use a titanium plate with a titanium content of 99.9% and a thickness of 1 mm as the substrate. After the titanium plate is sandblasted and polished to remove the oxide layer, it is placed in a NaOH solution with a concentration of 10% and shaken for 30 minutes, and then the oxalic acid solution with a concentration of 20% is used. Etch the titanium plate for 2 hours, wash it and place it in an ethanol solution for use;

[0084] 2) Preparation of active coating solution for the inner layer: use a mixed solution of n-butanol and isopropanol as a solvent, the volume ratio of n-butanol and isopropanol is 2:1, use ruthenium trichloride, chloroiridic acid, titanic acid Tetrabutyl ester and oxygen evolution inhibitor are used as solute, and concentrated hydrochloric acid is used as a stabilizer to form an inner layer active coating solution; in the inner layer a...

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Abstract

The invention discloses a preparation method of a sodium chlorate generator electrode. The preparation method comprises the following steps of (1) matrix treatment, (2) preparation of inner-layer active coating liquid, (3) preparation of inner-layer metal oxide, (4) preparation of outer-layer active coating liquid, and (5) preparation of the electrode. According to the novel preparation method of the sodium hypochlorite generator electrode, the prepared electrode has the advantages of being low in chlorine evolution potential, high in oxygen evolution potential, energy-saving, environmentally friendly, long in service life and high in electrolytic efficiency.

Description

technical field [0001] The invention relates to a sodium hypochlorite generator electrode, in particular to a preparation method of the sodium hypochlorite generator electrode. Background technique [0002] With the continuous pollution of water resources on the earth and the continuous shortage of water resources, disinfection water treatment is becoming more and more important; compared with other disinfection technologies, the preparation of sodium hypochlorite on site has obvious advantages, but the sodium hypochlorite generators currently on the market have power consumption. Problems such as high salt consumption and short electrode service life seriously restrict its large-scale application. The key to affecting the performance of sodium hypochlorite generators and restricting its application lies in the electrode material. [0003] Patent CN200910111957.2 A titanium electrode for chlorine generator and its preparation method discloses a titanium electrode for electro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/26C25B11/04
CPCC25B1/265C25B11/051C25B11/057C25B11/091
Inventor 倪康祥赵皓翰
Owner AWS ENVIRONMENT TECH LTD
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