Manufacturing method of heptammonium molybdate
I. INTRODUCTION
Ammonium heptamolybdate is an important raw material for the production of chemicals, which is widely used in metallurgy, chemical industry, aerospace, military and other fields. Due to its unique physical and chemical properties, the manufacturing method of heptamolybdate ammonium molybdate has attracted much attention. In this paper, the manufacturing method of heptammonium molybdate will be introduced in detail, including the preparation of raw materials, reaction process, post-treatment and other aspects.
II. Raw material preparation
1. Ammonium molybdate: Ammonium molybdate is the main raw material for the manufacture of Ammonium heptamolybdate, which should be analytically pure or chemically pure reagent to ensure the purity of the product.
2. Sulfuric acid: Sulfuric acid is used as the catalyst for the reaction, and industrial grade sulfuric acid with suitable concentration should be selected.
3. Deionized water: it is used to prepare the solution and wash the product to ensure the purity of the product.
3. Reaction process
1. Preparation of solution: dissolve ammonium molybdate in deionized water to make ammonium molybdate solution of certain concentration. At the same time, add sulfuric acid into deionized water to make a certain concentration of sulfuric acid solution.
2. Mixing reaction: Mix ammonium molybdate solution with sulfuric acid solution, control a certain reaction temperature and time, so that ammonium molybdate and sulfuric acid fully reacted to produce ammonium heptamolybdate.
3. Crystallization: After the reaction, the mixture is cooled and crystallized to obtain ammonium heptamolybdate crystals.
4. Post-treatment
1. Washing: Wash the crystals of ammonium heptamolybdate with deionized water to remove the impurities attached on the surface.
2. Drying: Dry the washed ammonium heptamolybdate crystals to obtain dried ammonium heptamolybdate product.
3. Packing: Pack the dried ammonium heptamolybdate product and store it in a cool and dry place.
V. Precautions
1. Strictly control the reaction temperature and time to avoid generating by-products or affecting product quality.
2. Appropriate temperature and time should be controlled during washing and drying to avoid decomposition or deterioration of the product.
3. Attention should be paid to safety during the production process, avoiding contact with acidic solution and high temperature equipment, and preventing burns and corrosion.
VI.CONCLUSION
VII The manufacturing method of ammonium molybdate includes the preparation of raw materials, the reaction process, post-treatment, etc., in which the reaction temperature and time are the key factors affecting the quality of the product. By strictly controlling the process parameters of each link, the product of ammonium heptamolybdate with high purity and stable quality can be obtained, which can provide important raw material guarantee for metallurgy, chemical industry, aerospace, military and other fields.
