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Inner layer active coating liquid and preparation method thereof

An active, liquid-coating technology, applied in electrodes, electrolysis process, electrolysis components, etc., can solve the problems of low oxygen evolution potential, economic loss, and increase equipment cost, so as to reduce the oxygen evolution rate, improve the oxygen evolution potential, and improve the usage longevity effect

Inactive Publication Date: 2017-09-08
AWS ENVIRONMENT TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[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, sodium hypochlorite prepared on site has obvious advantages, but the electrode life of sodium hypochlorite generators currently on the market Short, the electrode failure occurs when the equipment is in operation for about 1-2 years, so it has to be stopped to replace the electrode. Therefore, the electrode failure not only increases the cost of the equipment, but also delays the normal operation of the sodium hypochlorite generator, causing huge economic losses. loss
The root cause of electrode failure is that the oxygen evolution potential of the electrode is too low and the oxygen evolution rate is too fast during the electrolysis process, and the generated oxygen easily penetrates the coating and reacts with the titanium substrate to form non-conductive TiO 2 , so that the substrate is passivated and the electrode fails

Method used

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  • Inner layer active coating liquid and preparation method thereof
  • Inner layer active coating liquid and preparation method thereof

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preparation example Construction

[0029] A preparation method for inner layer active coating solution, comprising the following steps:

[0030] 1) Prepare the raw materials required for the solvent, solute and stabilizer, and prepare the solvent and solute according to the proportion for subsequent use;

[0031] 2) Add the solute to the solvent in turn, after fully dissolving, pour the stabilizer into it, and mix evenly.

Embodiment 1

[0033] A kind of inner active coating liquid, comprises solvent, solute and stabilizer, and solvent is made up of n-butanol, isopropanol, and the mass ratio of n-butanol, isopropanol is 2:1 in the solvent, and stabilizer is concentrated hydrochloric acid, and solute It is composed of ruthenium trichloride, chloroiridic acid, tetrabutyl titanate and oxygen evolution inhibitor. The oxygen evolution inhibitor is composed of antimony pentachloride and cerium nitrate; the concentration of metal ions in the active coating solution of the inner layer is 0.32mol / L, the volume ratio of solvent to stabilizer is 10:1.

[0034] In the active coating solution of the inner layer, in terms of molar percentage of metal ions, the proportion of metal ions in the solution occupied by ruthenium ions is 17mol%, the proportion of metal ions in the solution occupied by iridium ions is 9mol%, and the proportion of metal ions in the solution occupied by titanium ions is The proportion of metal ions i...

Embodiment 2

[0036] A kind of inner active coating liquid, comprises solvent, solute and stabilizer, and solvent is made up of n-butanol, isopropanol, and the mass ratio of n-butanol, isopropanol is 2:1 in the solvent, and stabilizer is concentrated hydrochloric acid, and solute It is composed of ruthenium trichloride, chloroiridic acid, tetrabutyl titanate and oxygen evolution inhibitor. The oxygen evolution inhibitor is composed of chromium sulfate and cobalt carbonate; the metal ion concentration in the inner layer active coating solution is 0.34mol / L, The volume ratio of solvent to stabilizer is 10:1.

[0037] In the active coating solution of the inner layer, in terms of molar percentage of metal ions, the proportion of metal ions in the solution occupied by ruthenium ions is 19mol%, the proportion of metal ions in the solution occupied by iridium ions is 11mol%, and the proportion of metal ions in the solution occupied by titanium ions is The proportion of metal ions in the solution ...

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Abstract

The invention discloses inner layer active coating liquid and a preparation method thereof. The inner layer active coating liquid comprises solvents, solutes and stabilizers. The solvents are composed of normal butanol and isopropanol. The solutes are composed of ruthenium trichloride, chloroiridic acid, tetrabutyl titanate and oxygen evolution inhibitors. The concentration of metal ions in the inner layer active coating liquid is 0.3-0.4 mol / L. The volume ratio of the solvents to the stabilizers is 10:1. According to the inner layer active coating liquid, the situation that an electrode of a sodium hypochlorite generator is high in oxygen evolution potential, small in oxygen evolution rate and long in service life is promoted. The preparation method of the inner layer active coating liquid is simple in step, easy to operate and convenient for large scale industrialized production.

Description

technical field [0001] The invention relates to a sodium hypochlorite generator electrode, in particular to an inner layer active coating solution and a preparation method thereof. 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, sodium hypochlorite prepared on site has obvious advantages, but the electrode life of sodium hypochlorite generators currently on the market Short, the electrode failure occurs when the equipment is in operation for about 1-2 years, so it has to be stopped to replace the electrode. Therefore, the electrode failure not only increases the cost of the equipment, but also delays the normal operation of the sodium hypochlorite generator, causing huge economic losses. loss. The root cause of electrode failure is that the oxygen evolution potential of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/04
CPCC25B11/097
Inventor 倪康祥赵皓翰
Owner AWS ENVIRONMENT TECH LTD
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