Liquid Solid Extraction 🎯 🔥

– Always followed by a separation (e.g., filtration, decantation, centrifugation) to recover the miscella (extract solution) from the raffinate (depleted solid).

– Generally lower energy consumption compared to distillation or evaporation for separating soluble components, especially when followed by solvent recovery.

: The liquid solvent is brought into contact with the solid material. liquid solid extraction

The theoretical maximum extraction yield is determined by the equilibrium between the solute within the solid matrix and the solute dissolved in the solvent. This relationship is often described by a distribution coefficient, $K$: $$ K = \fracC_sC_m $$ Where $C_s$ is the concentration of the solute in the solid and $C_m$ is the concentration in the liquid phase. Factors influencing this equilibrium include the solute's solubility in the solvent, temperature, and the presence of other solutes.

: The solute is recovered from the solvent, often through evaporation or distillation, allowing the solvent to be recycled. Key Factors Affecting Extraction Efficiency – Always followed by a separation (e

: The solute migrates from the solid matrix into the surrounding solvent.

Several operational parameters must be optimized to maximize yield and selectivity: The theoretical maximum extraction yield is determined by

– Used in food (oil extraction from seeds), pharmaceuticals (herbal extraction), mining (heap leaching of metals), and waste treatment.

– Can use co-current, counter-current, or cross-current flow patterns to maximize recovery and minimize solvent usage.