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There are two methods used in laboratories to prepare effervescent granules (dry method and wet method).
The two methods lead to granules that are consistent in characteristics, size, shape, chemically and physically.
Dry method ( fusion) :
In this way, machines for mixing and grinding are adopted, provided that they are strong and durable of steel and are resistant to rust or long-term effects.
It begins with grinding a strong acid such as citric acid or tartaric acid, as these acids are considered a source of oxygen and some other substances are added to it in the same sieve such as sweeteners, sugars, colors and other lubricants that add to the granules in a state of dispersion .
Of course, grinding each material separately is very important for an approximate consistency of the particle, so the accuracy in the proportions of the ingredients increases .
When mixing, mixing is done at a certain temperature and low humidity so that an early chemical reaction does not occur that leads to the spoilage of one of the materials, so it is in a short and fast time for less environmental impact.
The acid has water molecules in its components from the beginning, so the particle is heated at certain temperatures to release the water molecules .
When the water is liberated, the acid has oxygen molecules, and the water also contains oxygen, so some carbon dioxide is released .
During heating and movement, it leads to the softness of the particle, and it becomes softer, like a spongy bread dough to a certain degree. At this moment, it is extruded and quickly rubbed in a circular motion in the sieves to produce granules of a consistent size according to the openings in the sieves.
All the granules come out of the negative of the sieve and are spongy until this moment, so they are placed at certain temperatures to remove the moisture of the water entering the crystallization, dry the granules and prepare them for storage at normal temperature and acceptable humidity in tightly sealed containers.
