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[Chemical Knowledge]：Production and manufacturing method and process flow of ammonium molybdate

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The manufacturing method
of ammonium molybdate
1. Introduction

Ammonium molybdate is an important chemical production raw material, widely used in metallurgy, petroleum, chemical, agriculture and other fields. Mastering the manufacturing method of ammonium molybdate is of great significance for improving product quality, reducing costs and promoting industrial development. This paper will introduce the manufacturing method of ammonium molybdate in detail, including raw material preparation, reaction process, post-treatment and so on.

2. raw material preparation

the main raw materials for the manufacture of ammonium molybdate, including molybdenum concentrate, ammonia, sulfuric acid and so on. In order to ensure product quality, it is necessary to select high-quality raw materials and conduct strict inspections. Among them, molybdenum concentrate molybdenum content should be not less than 45%, ammonia concentration should be between 25% ~ 28%, sulfuric acid concentration should be 93% ~ 98%.

3. reaction process

1. Leaching
Molybdenum concentrate and sulfuric acid mixed in a certain proportion, heated to a certain temperature, leaching reaction. Appropriate stirring speed and time should be maintained during the leaching process to ensure that the molybdenum concentrate is fully reacted. After completion of the reaction, molybdic acid leaching solution was obtained by filtration.

2. Neutralization
Mix molybdic acid leaching solution and ammonia water according to a certain proportion, adjust the pH value to an appropriate range, and precipitate ammonium molybdate. In order to maintain the stability of ammonium molybdate in the solution, the addition rate and amount of ammonia should be controlled during the neutralization process.

3. Crystallization
The neutralized solution was subjected to a crystallization operation to obtain crystals of ammonium molybdate. Crystallization temperature and stirring speed should be controlled in order to obtain crystals with uniform particle size and high purity.

4. Post-Treatment

1. Centrifugal Separation
The crystallized solution was centrifuged to obtain ammonium molybdate crystals and a mother liquor. Centrifugation speed and time should be controlled during centrifugation to ensure effective separation of crystals and mother liquor.

2. Washing
The ammonium molybdate crystal is washed with deionized water to remove impurity ions attached to the surface. The washing liquid needs to be replaced several times during the washing process to ensure the purity of the crystals.

3. Drying
The washed ammonium molybdate crystals are dried to obtain the final ammonium molybdate product. The drying temperature and time should be controlled during the drying process to avoid crystal agglomeration and deterioration.
Precautions for
5.

1. During the entire manufacturing process, the temperature and pH value of each link should be strictly controlled to ensure the quality and purity of the product.
2. The ratio of raw materials should be adjusted according to the actual situation to ensure the smooth progress of the reaction and the quality of the product.
3. In the process of operation, attention should be paid to safety and avoid contact with toxic and harmful substances.

6. conclusion

mastering the manufacturing method of ammonium molybdate is of great significance for improving product quality, reducing costs and promoting industrial development. Through strict raw material preparation, scientific reaction process and post-treatment operation, high-purity ammonium molybdate products can be produced to meet the needs of different fields. In the actual production process, the manufacturing method should be optimized and improved according to the specific situation to improve production efficiency and product quality.

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