The principle of the ammonium metatungstate tungstate method mainly involves the chemical reaction process of tungstic acid and ammonia water, which can be summarized as follows:
Raw materials and reactants
The main raw materials are tungstic acid and ammonia water.
Dissolution process
Tungstic acid is first dissolved by ammonia water, and this step is carried out in boiling deionized water.
Reaction process
Under stirring and heating conditions, ammonia water and tungstic acid react chemically to make the pH value of the solution reach 8.
In this process, tungstic acid combines with ammonia in ammonia water to form ammonium metatungstate (AMT) and the corresponding hydrate.
Reaction conditions
Appropriate temperature and stirring speed need to be controlled to ensure the smooth progress of the reaction.
Accurate control of temperature is crucial to the purity and quality of the product.
Subsequent treatment
After the reaction is completed, the solution needs to be cooled and filtered to remove possible impurities.
Subsequently, the solution can be evaporated and crystallized to obtain ammonium metatungstate crystals.
Product Features
Ammonium metatungstate is an important inorganic compound that is easily decomposed at high temperatures. The decomposition products are tungsten oxide, ammonia and water. The decomposition temperature is usually around 400°C-500°C, depending on the process conditions and product purity.
Application Fields
Ammonium metatungstate is widely used in many industries such as electronics, metallurgy, petrochemicals, ceramics, etc.
In summary, the principle of the ammonium metatungstate tungstic acid method is to generate ammonium metatungstate through the chemical reaction of ammonia water and tungstic acid, and then obtain pure ammonium metatungstate products through subsequent treatment. In this process, the reaction conditions need to be precisely controlled to ensure the quality and purity of the product.
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