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Additive for electrolyzing manganese from manganese sulfate electrolyte system and application method of additive

An application method and technology of electrolytic manganese, applied in electrolytic process, electrolytic components, photography technology, etc., can solve problems such as endangering human health, affecting the quality and price of electrolytic manganese, and low product purity

Inactive Publication Date: 2014-05-07
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When sulfur dioxide is used as an electrolytic additive, the product has low purity, low current efficiency, and the sulfur content easily exceeds the standard, which affects the quality and price of electrolytic manganese, and limits the application range of this product.
When selenium dioxide is used as an electrolytic additive, its current efficiency is relatively higher than when sulfur dioxide is used as an additive, and the ability to resist impurities is strong. Harmful to human health and seriously pollute the environment

Method used

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  • Additive for electrolyzing manganese from manganese sulfate electrolyte system and application method of additive

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The composition and implementation process conditions of the cathode tank selenium-free electrolytic manganese liquid adopted in the embodiment of the present invention except additives are as follows:

[0027] Process conditions

[0028] The results obtained are as follows:

[0029] Additives

[0030] It can be seen that sodium citrate, potassium citrate, and ammonium citrate, which are monovalent compounds containing citrate, are all good additives for electrolytic manganese. Compared with other additives, the selenium-free electrolytic manganese additive of the invention is non-toxic, non-polluting, has high current efficiency and simple production process.

Embodiment 2

[0032] The composition and implementation process conditions of the cathode cell electrolytic manganese liquid adopted in the embodiment of the present invention except the compound are as follows:

[0033] Process conditions

[0034] The results obtained are as follows:

[0035] experiment number

[0036] As can be seen from the experimental results in the above table, reduce the addition of sodium citrate, and add a small amount of p-aminobenzenesulfonic acid, sodium thiosulfate, sodium laurylsulfonate, thiourea, sodium lauryl sulfate respectively for compounding. Matching, can get high-purity electrolytic manganese products, and has a good electrolytic efficiency.

Embodiment 3

[0038] Sodium citrate is used as an additive to the electrolytic manganese solution, and the electrolytic manganese sulfate solution in the cathode tank is prepared according to the following raw material ratio and method: the content of sodium citrate in the electrolytic manganese solution is 20-50g / L.

[0039] The cathode tank electrolytic manganese solution adopted in the embodiment of the present invention is composed and implemented process conditions: the concentration of manganese is 18g / L, ammonium sulfate 110g / L, sodium thiosulfate 40mg / L, pH value 7.5, tank temperature 38 ℃, current density 350A / m 2 , the voltage is 5.1V, and the amount of sodium citrate added is shown in the table below. According to the requirements of Experiment 12, Experiment 13, Experiment 14 and Experiment 15, respectively prepare catholyte, stir at room temperature until completely dissolved, adjust the pH value of the cathode tank electrolyte with sodium hydroxide solution, and then put it in...

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Abstract

The invention discloses an additive for electrolyzing manganese from a manganese sulfate electrolyte system and an application method of the additive. The additive is characterized in that a citric acid compound or a compound additive containing the citric acid compound as the main component is added into an ammonium sulfate contained manganese sulfate electrolyte in a cathode tank to replace the poisonous selenium dioxide and sulfur dioxide added into the traditional electrolytic manganese solution. In the electrolytic manganese solution in the cathode tank, the content of citrate in the electrolytic manganese solution is 5-80g / L, then, the pH value is regulated to 6.5-8.5 by using an alkaline solution, the concentration of the compound is 0.01-1g / L, and the concentration of ammonium sulfate is 30-180g / L; and in a solution in an anode tank, the concentration of sodium thiosulfate is 0.01-1g / L, the concentration of ammonium sulfate is 30-180g / L, and the concentration of sulfuric acid is 25-35g / L. Electrolytic manganese with the purity of 99.95-99.99% can be obtained through producing the electrolytic manganese under such a condition. The additive can be recycled.

Description

technical field [0001] The present invention is an additive for electrolyzing manganese from a manganese sulfate electrolyte system and its application method, which is characterized in that in the cathode tank, in the manganese sulfate electrolyte containing ammonium sulfate, add citrate and mainly The composite additives replace the toxic selenium dioxide and sulfur dioxide added in the traditional electrolytic manganese solution, and the electrolytic manganese with a purity of 99.95%-99.99% can be obtained. Background technique [0002] The electrolytic manganese industry is an industry that consumes a lot of resources and energy, and produces a large amount of pollutants. It should implement energy-saving and emission-reduction strategies, and explore new additives and new processes with high technological content, good economic benefits, low resource consumption, and less environmental pollution. The selenium-free and non-toxic electrolytic manganese additive is an impo...

Claims

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Application Information

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IPC IPC(8): C25C1/10C25C7/06
Inventor 阳卫军屈晓娟朱利军
Owner HUNAN UNIV