The stability of Ammonium Metatungstate Dispersions is affected by many factors, which can be summarized as follows:
- Time of material placement
Time effect
Experiments show that the extraction rate of tungsten and molybdenum tends to be stabilized when the placement time of the feed solution reaches 24h, however, too long placement time may also affect the stability of the feed solution, so it is necessary to avoid too long placement time under the premise of ensuring the reaction is complete.
- pH value
Influence of pH value
The pH value of ammonium metatungstate has a significant effect on its stability. In the range of pH1.0~2.4, with the increase of feed solution pH, the more stable the feed solution is, and the lower the pH, the worse the stability of the feed solution is. When the pH value of the material is very low, the material will precipitate after a very short period of time. Therefore, when preparing the complexing solution, choosing the appropriate pH value (e.g. pH1.6) is the key to ensure stability.
- Temperature
Temperature control
The temperature control of ammonium metatungstate in the dehydration process requires strict, otherwise it is easy to cause the dissolution of crystals, which in turn affects the stability of its dispersion. In the preparation and use of the process, the temperature needs to be strictly controlled to avoid too high or too low temperature on the stability of adverse effects.
- Solvent-solute interaction
Solvent type
The solubility of ammonium metatungstate is affected by the type of solvent, and the solubility and stability of ammonium metatungstate may be different in different solvents. Therefore, when selecting solvents, its influence on the stability and dispersion of ammonium metatungstate needs to be considered.
- Ion concentration and presence of chemical substances
Ion concentration
Ion concentration in solution affects the pH and stability of ammonium metatungstate. When other acid-base substances or salts are present in the solution, their ionic concentration will have an effect on the acid-base of the solution, thus changing the pH value and affecting the stability of ammonium metatungstate.
Presence of chemical substances
Certain chemical substances may react with ammonium metatungstate to produce unstable compounds or precipitates, thus affecting the stability of its dispersion.
- Other factors
Pressure
Although the effect of pressure on the solubility of Ammonium Metatungstate is small, under some specific conditions (such as high-pressure reaction), pressure may become one of the factors affecting the stability.
Operating environment
The cleanliness and humidity of the operation environment may also affect the stability of ammonium metatungstate dispersion.
In summary, the stability of ammonium metatungstate dispersion is affected by the time of material placement, material pH, temperature, solvent-solute interaction, ion concentration and the presence of chemical substances, as well as other factors (such as pressure and operating environment). In practical application, these factors need to be considered comprehensively to improve the stability of ammonium metatungstate dispersions by optimizing the preparation process and use conditions.
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
