Formally, dissolution is defined as mixing of two phases with formation of a new homogenous phase.
Dissolution is the physico-chemical process by which a solid, liquid or gaseous substance (known as a solute) is brought into contact with a liquid or incorporated into a solvent where it is dissolved to form a homogeneous mixture called a solution.
Homogenisation by dissolution is a process which finds many applications in the industrial world, in sectors such as chemistry, petrochemistry, pharmacy, food processing or cosmetics.
To achieve homogeneous solutions, two agitating techniques are mainly used:
- by means of magnetic stirrers equipped with turbines, propellers or anchors depending on the application concerned and the qualities of the solute used (viscosity, fibrous aspect, low or high miscibility, etc.).
In the dissolution process, the agitator has a dual role: it creates dispersion from the physical point of view and absorption from the chemical point of view.
It is the technique most often used for solid/liquid mixtures, where it ensures faster dispersion, homogenisation and dissolution.
- By using static mixers which, thanks to the different shapes of the elements that make them up, make it possible to respond to many industrial applications. For example, helical elements that ensure the homogenisation of products by the turbulence created, or alternating Cross type elements that are more suitable for mixing high viscosity fluids.