UNITÉ D'OPÉRATIONS

Unit operations are each of the physical changes that occur in the processes of the chemical industry. They arise from the study of different chemical processes in which a different operation is apparently performed but they have the same basis.

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These operations can be divided into three types:

    • Mass transfer. A change in the mass or composition of the matter, which may include a chemical change. These operations are distillation, absorption, adsorption, extraction and ion exchange, in which the change is mainly physical.
    • Energy transfer. Energy change that, for example, may suppose a change of state due to a change of pressure and/or temperature. This classification includes the evaporation, although other operations that combine energy transfer with mass transfer (drying, lyophilization, sublimation, crystallization and humidification) are also included.
    • Momentum transfer. Change in the kinetic conditions of matter. The operations involving a kinetic change are filtration, sedimentation, flotation and centrifugation.

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All of them are experimentally based on the corresponding conservation laws.

This type of operations is used in multiple industries. They are the basis of a wide range of processes from different fields of application, as for example the food industry, the energy industry, etc.

PRODUITS DE UNITÉ D'OPÉRATIONS
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