Applications - Glossary

Dilution

Dilution is a process that consists of obtaining a final solution with a lower concentration than at the outset, either by adding solvent, or by drawing off some of the solution and topping up with solvent to keep the same volume. Dilution is characterized by its dilution ratio. This concept presupposes that the diluted body is soluble in the solvent used.

Dissolution

Dissolution is the physico-chemical process by which a solute is incorporated in a solvent (we say the solute is dissolved) and forms a homogenous mixture called a solution.
Formally, dissolution is defined as mixing of two phases with formation of a new homogenous phase.

Emulsion

Emulsion is the action of high-intensity mixing, with the aim of making two immiscible liquids miscible. It can be summarized as dispersing a liquid in fine droplets (dispersed phase) in another liquid (continuous phase).  This action uses Rotor/Stator* type blades.

Gas absorption

Absorption is a very common operation in gas purification. The aim of the operation is to transfer a weakly-concentrated compound from a gas phase to the liquid phase. The absorbed compound can physically dissolve in the liquid and may react there chemically. Absorption is therefore a phenomenon whereby a product in gaseous state dissolves into a liquid in the solvent.

Gas/liquid dispersion

Gas/liquid dispersion defines incorporation of a gas by separation into small bubbles in a liquid thanks to Rushton* and/or Disgaz* type turbines in order to obtain a chemical/thermal reaction.

Heat transfer

Heat transfer, more commonly just called heat, is an exchange of thermal energy between two bodies at different temperatures, in order to obtain molecular evolution and thermal equilibrium between them. It corresponds to a chaotic microscopic energy transfer. The three fundamental heat transfer methods are conduction, convection and radiation.

Homogenization

Action of making one or more substances or a mixture uniform, or blending different elements in an assembly, in order to give unity and coherence to the whole. Hence it is the fact of submitting certain liquids to mechanical processing that prevents settlement of the constituent elements in the mass.

Liquid/liquid dispersion

Liquid/liquid dispersion is the action of mixing, in order to make two or more miscible liquids homogenous. This action uses Propeller* and/or Turbine* type blades.

Maintenance in suspension

The maintenance in suspension process precedes suspension. It involves mixing two bodies of different sizes (liquid/solid) in order to, thanks to the force of movement and the energy generated, raise all the bodies in the vessel and keep them moving. The fluid will thus drag the isolated solid particle in a regular movement somewhat different from its own.

Mixing fibrous liquids/solids

In order to encourage complex mixing of fibrous solids, AGITEC is developing special blades such as the AX4 accompanied by liquid to homogenize the solution and prevent fibres getting tangled around the blade.

Mixing immiscible liquids

Process of stirring two or more immiscible liquids (eg: oil & water), in order to obtain a chemical solution/reaction which is more or less homogenous. The opposite process is called settlement.

Mixing miscible liquids

Mixing miscible liquids corresponds to stirring two or more perfectly homogenous mixtures.

Solid/liquid dispersion

Solid/liquid dispersions are systems formed of a liquid in which small solid particles are submerged. There are different types of dispersion, the majority of which are used as a processing intermediate.

Spalling

Spalling is a process in which a solid breaks down due to pressure exerted by a moving liquid. 

Suspension

The suspension process involves mixing two bodies of different sizes (liquid/solid) in order to, thanks to the force of movement and the energy generated, raise all the bodies in the vessel. The fluid will thus drag the isolated solid particle in a movement somewhat different from its own.