Chapter 4
Introduction to Separation Methods
Estados de la materia y cambios de fase
The internal energy of a substance—the total kinetic energy of all its molecules and the potential energy of their associated forces—depends ...
Destilación: Equilibrios vapor-líquido
Distillation is a separation technique that takes advantage of the boiling point properties of disparate elements in a mixture. To perform distillation, ...
Filtración
Filtration is the physical separation of solids from a fluid using a filtration medium.
The filtration medium is chosen depending on the purpose of ...
Centrifugación
Centrifugation is a method of separating suspended particles from a liquid by spinning in a centrifuge at a high number of revolutions per minute.
...
Sublimación
Sublimation is the direct phase transformation from the solid to the gaseous phase, bypassing the liquid state.
For example, solid carbon dioxide, or dry ...
Recristalización: Equilibrios sólido-solución
Recrystallization is a purification technique used to separate impurities from solid compounds. In this technique, no chemical reactions occur. Instead, ...
Crecimiento de cristales: Principios de cristalización
Crystallization is a phase transformation process in which crystals are precipitated from a supersaturated solution or formed from other sources. During ...
Precipitación y coprecipitación
Precipitation and coprecipitation techniques can be applied to separate a mixture of ions.
When different ions form sparingly soluble salts with the same ...
Coagulación
Coagulation is the agglomeration of colloidal particles to form larger aggregates.
This technique is applied to purify wastewater containing suspended ...
Electrodeposición
During electrodeposition, ions are separated from a solution by deposition on an electrode in an electrolytic cell.
While reduction occurs at the cathode ...
Extracción: Coeficientes de partición y distribución
The distribution law or Nernst's distribution law is the law that governs the distribution of a solute between two immiscible solvents. This law, also ...
Extracción: Efectos del pH
Consider a weak base, B, with a partition coefficient, K, between the organic and aqueous phases.
While organic bases are usually more ...
Extracción: Métodos avanzados
Metal ions can be separated by complexation with organic ligands to form uncharged chelates.
The chelating agent must contain hydrophobic groups and ...
Cromatografía: Introducción
Chromatography is a technique used to separate compounds based on differences of partitioning between two phases, the stationary phase and the mobile ...
Diálisis
Dialysis separates desired analyte ions or molecules from unwanted molecules, or 'interferents', by allowing the sample solution to diffuse ...
Volatilización
Volatilization separates a desired component, known as an analyte, from the other compounds in a sample by converting it to a volatile species through ...
Intercambio iónico
Ion exchange separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the ...
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