Method for preparing hydrogen in process of producing trimanganese tetroxide from electrolytic manganese metal

A technology of electrolytic manganese metal and trimanganese oxide, which is applied in the production of manganese oxide/manganese hydroxide and hydrogen, can solve problems such as combustion explosion, low hydrogen concentration, and no recycling value, and achieve energy saving and economic cost The effect of low and good economic benefits and social value

Inactive Publication Date: 2013-08-14
湖南特种金属材料有限责任公司宁乡分公司
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  • Abstract
  • Description
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Problems solved by technology

[0003] The production of trimanganese tetroxide by electrolytic manganese metal is the main production method in the trimanganese tetraoxide industry in my country. During the production process, the reaction of manganese and water can release hydrogen. The hydrolysis reaction and the oxidation reaction are carried out simultaneously, resulting in a low concentration of hydrogen gas, which has no recovery value
The hydrogen generated by the reaction may also cause safety accidents such as combustion and explosion in the production process of manganese tetraoxide. Therefore, hydrogen is often discharged as a harmful gas in the production process of manganese tetraoxide in my country.

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  • Method for preparing hydrogen in process of producing trimanganese tetroxide from electrolytic manganese metal

Examples

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Embodiment 1

[0041] The method for preparing hydrogen in a kind of electrolytic manganese metal production process of manganese tetraoxide of the present embodiment comprises the following steps:

[0042] (1) Weigh 1000g of electrolytic manganese metal, crush it in a ball mill for 1 hour to make electrolytic manganese metal powder, and use an analytical sieve to test that its particle size is 100% less than 100 μm;

[0043] (2) Add 3L of distilled water to the electrolytic manganese metal powder to prepare a slurry, and put the slurry into the hydrogen generator;

[0044] (3) Weigh 10g of ammonium chloride, add it to the slurry, control the temperature of the system at 65°C, stir for 1 hour, and control the pH at 6. After the slurry is hydrolyzed, manganese hydroxide will be generated and hydrogen will be released;

[0045] (4) After discharging the gas released in the first 3 minutes of reaction, use a collection bag to collect the gas released in the subsequent reaction, and pass the man...

Embodiment 2

[0048] The method for preparing hydrogen in a kind of electrolytic manganese metal production process of manganese tetraoxide of the present embodiment comprises the following steps:

[0049] (1) Weigh 2000 g of electrolytic manganese metal, crush it in a ball mill for 1.5 hours to make electrolytic manganese metal powder, and use an analytical sieve to test that its particle size is 100% less than 75 μm;

[0050] (2) Add 5L of distilled water to the electrolytic metal manganese powder to prepare a slurry, and put the slurry into the hydrogen generator;

[0051] (3) Weigh 25g of ammonium sulfate, add it to the slurry, control the system temperature at 80°C, stir for 1 hour, and control the pH at 7. After the slurry is hydrolyzed, manganese hydroxide will be generated and hydrogen will be released;

[0052](4) After discharging the gas released in the first 3 minutes of reaction, use a collection bag to collect the gas released in the subsequent reaction, and pass the manganese...

Embodiment 3

[0055] The method for preparing hydrogen in a kind of electrolytic manganese metal production process of manganese tetraoxide of the present embodiment comprises the following steps:

[0056] (1) Weigh 1500g of electrolytic manganese metal, add 4L of distilled water to make a slurry;

[0057] (2) Put the slurry into a ball mill and grind it for 1 hour to make a slurry with a particle size of 100% less than 60 μm, and put the slurry into a hydrogen generator;

[0058] (3) Weigh 20g of manganese chloride, add it to the slurry, control the system temperature at 85°C, stir for 1 hour, and control the pH at 9. After the slurry is hydrolyzed, manganese hydroxide will be generated and hydrogen will be released;

[0059] (4) After discharging the gas released in the first 3 minutes of reaction, use a collection bag to collect the gas released in the subsequent reaction, and pass the manganese hydroxide generated by the reaction into compressed air for oxidation reaction at a temperatu...

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Abstract

The invention relates to a method for preparing hydrogen in process of producing manganous-manganic oxide through electrolytic manganese metal and belongs to the field of chemical metallurgy. The preparation method comprises the following steps: crushing the electrolytic manganese metal in the process of producing the manganous-manganic oxide by taking the electrolytic manganese metal as a raw material, reacting the electrolytic manganese metal with water to generate manganese hydroxide under specific conditions under the catalytic action of a catalyst, and releasing the hydrogen, wherein the specific reaction conditions in the process of preparing the hydrogen are that the crushing particle size of the electrolytic manganese metal is less than 150 microns, the addition amount of the catalyst is 5-15g of catalyst added into each 1000g of electrolytic manganese metal, the reaction temperature is controlled to be 40-90 DEG C, and the PH value of the reaction process is controlled to be 6-12. The manganese hydroxide generated through the reaction is prepared into a manganous-manganic oxide product through other oxidation processes, and the hydrogen concentration of the hydrogen released from the reaction can reach 80-90 percent, and the hydrogen becomes a final gas product. The added catalysts are ammonium chloride, ammonium sulfate, hydrochloric acid, manganese chloride and oxalic acid and also comprise two or more catalysts.

Description

technical field [0001] The invention relates to the field of metallurgical and chemical production, in particular to a method for preparing hydrogen by reacting manganese and water under specific conditions in the process of producing manganese tetraoxide by using electrolytic metal manganese as a raw material. Background technique [0002] Hydrogen is recognized as a clean energy source, and it is also an important raw material for the petrochemical industry, electronics industry, aerospace industry, and flotation glass industry. With the advent of the era of clean energy, the demand potential for hydrogen is undoubtedly huge. [0003] The production of trimanganese tetraoxide by electrolytic manganese metal is the main production method in the trimanganese tetraoxide industry in my country. During the production process, the reaction of manganese and water can release hydrogen. The hydrolysis reaction and the oxidation reaction are carried out simultaneously, resulting in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/08C01G45/02
CPCY02E60/36
Inventor 赵凯陈飞宇银瑰
Owner 湖南特种金属材料有限责任公司宁乡分公司
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