The drying process of the produced ammonium metatungstate crystals needs to follow certain steps to ensure the quality and stability of the product. The following are the steps and precautions for drying ammonium metatungstate crystals:
Drying steps
Preliminary filtration
The ammonium metatungstate crystals crystallized from the solution are preliminarily filtered through a filtering device (such as a Buchner funnel, suction filter, etc.) to remove excess mother liquor.
Washing
The ammonium metatungstate crystals after preliminary filtration are washed with deionized water or purified water to remove impurities attached to the surface of the crystals and residual mother liquor. The washing process can be repeated several times to improve the purity of the crystals.
Drying preparation
The washed ammonium metatungstate crystals are evenly spread on a drying plate or drying tray to ensure that the crystals are not too dense to facilitate heat transfer and water evaporation during the drying process.
Choose a drying method
Choose a suitable drying method according to the production scale and equipment conditions. Common drying methods include natural drying, oven drying, spray drying, etc.
Natural drying
Suitable for small-scale production or laboratory preparation. Place the drying tray with crystals in a well-ventilated, dust-free room and let the crystals dry naturally. The drying time depends on the ambient temperature and humidity, and usually takes several hours to several days.
Oven drying
Suitable for medium-scale production. Place the drying tray with crystals in a constant temperature oven, set the appropriate temperature (usually 80°C to 100°C) and time (depending on the water content of the crystals and the drying efficiency, usually a few hours to more than ten hours), and let the crystals dry in the oven.
Spray drying
Suitable for large-scale production. The solution containing ammonium metatungstate crystals is spray-dried through a spray dryer, and the water in the solution is quickly evaporated by high-temperature air to obtain dry ammonium metatungstate powder. Spray drying has the advantages of high drying efficiency and good product quality.
Precautions during the drying process
The temperature and time must be strictly controlled during the drying process to avoid excessive temperature causing crystal decomposition or excessive drying of the crystals due to long time and loss of activity.
The drying environment must be kept clean and dust-free to prevent the crystals from being contaminated during the drying process.
Drying equipment must be regularly inspected and maintained to ensure normal operation of the equipment and drying effect.
The drying process of ammonium metatungstate crystals is a key step. It is necessary to select the appropriate drying method and control the drying conditions to ensure the quality and stability of the product. During the drying process, attention should be paid to temperature, time, environmental cleanliness and equipment maintenance.
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
