Solid / liquid dispersion

Solid/liquid dispersion is a process for immersing solid particles in a liquid in a homogeneous manner. In principle, the liquid phase is aqueous or oily and the solid particles can be made up of organic polymers in the pharmaceutical industry, for example, in the manufacture of various creams (clay slurry) and toothpastes (silica).

Colloids are small particles that make up the solids that are mixed with a liquid. A suspension is thus defined by a process of immersing these colloids in a liquid phase in order to make the mixture homogeneous and avoid heaps.

Which agitator should be chosen to facilitate the immersion of solid particles in a liquid?

The AGM-FCR rapid tank bottom dispersing magnetic stirrer has been designed to disperse powders and functions as a homogenizer for the simple maintenance of mixtures up to the dispersion of complex powders in a carrier liquid by coupling it with an AGM-FC type stirrer.

The MARLLIN TA4, TA3, TA2 range of turbines, thanks to the action of its 45° inclined blades, creates a vortex which transfers the mixture (emulsion) from the axis to the walls of the tank. It also allows suspension without heaps for many applications in the field of biotechnology and fine chemistry. The impact of the systematic introduction of gas into the mixture during this process must be taken into account.

What is the use of solid/liquid dispersion in the industrial field?

In the field of agro-food, there are many applications for coatings and/or adhesion.

In the field of fine chemistry, the manufacture of flavours requires the use of solid/liquid dispersion.

In the field of pharmacology and in order to preserve the active properties of the components, the industrial technique of immersing solid particles in a liquid is common in the manufacture of antibiotics.

In the field of cosmetics, dispersion is made useful in order to preserve in a homogeneous way the care creams for example.

Equipments adapted for the application: Solid/liquid dispersion :


Stirrer propeller important shearing effect
AX3 profiled propeller for magnetic stirrer, high shear rate


Turbine stirrer with blades inclined at 45 °
45° tilted blade impellers - radial centrifugal and axial vertical effect
Flat dispersing turbine stirrer with toothed disk
Dispersion in industrial stirrer : flat toothed disc turbine