Ammonium metatungstate reacts readily under the following conditions:
Temperature conditions
Ammonium metatungstate begins to decompose when heated at a temperature of about 250-300 degrees Celsius. In this temperature range, it gradually decomposes into ammonia, oxygen and tungsten oxide.
For the conversion of ammonium metatungstate to ammonium tungstate, the appropriate reaction temperature is between 60-80 degrees Celsius. The appropriate temperature can promote the reaction rate, but too high or too low temperature will affect the reaction.
pH condition
In the preparation of ammonium metatungstate, the control of pH is crucial for the reaction to proceed. For example, in the neutralization method, ammonium sec-metatungstate and nitric acid need to be reacted at pH 2 to 4 to produce ammonium metatungstate.
In the study of the preparation of ammonium metatungstate solution by electrodialysis, the pH in the salt chamber was controlled between 2.5 and 4 to obtain the best current efficiency and product quality.
Other reaction conditions
Ammonium metatungstate may react chemically when it comes into contact with organic substances, alkaline substances and acidic gases, etc. Therefore, mixed storage should be avoided.
Oxygen concentration also affects the conversion reaction of ammonium metatungstate. Oxygen acts as an oxidizer in the reaction and promotes the conversion of ammonium metatungstate. Therefore, it is necessary to maintain an appropriate concentration of oxygen during the reaction.
The choice of catalyst also plays an important role in the reaction. Commonly used catalysts include transition metal ions and so on, which can improve the reaction rate and product purity.
In summary, ammonium metatungstate reacts easily under specific temperature, pH and other reaction conditions. In practical application, it is necessary to choose the appropriate preparation method and control parameters according to the specific needs and conditions to ensure the efficient conduct of the reaction and the quality of the product.
More details of ammonium metatungstate product, please visit website: http://ammonium-metatungstate.com/
Please contact CHINATUNGSTEN for inquiry and order of ammonium metatungstate:
Email: sales@chinatungsten.com
Tel.: 86 592 5129595
