The production process of ammonium metatungstate does involve an evaporation crystallization step. Reference article 2 clearly mentions a method of producing ammonium metatungstate powder, which includes taking ammonium metatungstate solution as raw material, and finally obtaining ammonium metatungstate powder through evaporation and crystallization, far-infrared low-temperature heating to remove free water, and high-temperature heating and drying.
Specifically, the evaporation crystallization step serves to evaporate the water in the solution by heating, thereby crystallizing the ammonium metatungstate from the solution. This step not only helps to remove impurities in the solution and improve the purity of the product, but also helps to control the particle size of the product, so that the ammonium metatungstate powder obtained is more uniform and delicate.
In addition, the specific operating conditions of the evaporation and crystallization step, such as temperature, pressure, time, etc., need to be adjusted and optimized according to the specific production process and equipment conditions to ensure that high-quality ammonium metatungstate products are obtained. Therefore, the production process of ammonium metatungstate does include an evaporation crystallization step, and this step plays an important role in improving product quality and performance.
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