Transcription of Solid-Liquid Extraction (( Leaching
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Solid-Liquid Extraction (( Leaching
Chapter (10) Solid-Liquid Extraction (( Leaching )) Leaching : is the separation of a solute from solid mixture by dissolving it in a liquid phase. Leaching occurs in two steps: 1. Contacting solvent and solid to effect a transfer of a solute ( Leaching ). 2. The separation of the solution from the remaining solid (washing). Factors influencing the rate of Extraction : There are four important factors to be considered: 1. Particle size. 2. Solvent. 3. Temperature. 4. Agitation of the fluid. Mass Transfer Third Year Assist. Prof. Dr. Ahmed Daham 2 Batch Leaching Mass transfer rates within the porous residue are difficult to assess because it is impossible to define the shape of the channels through which transfer must take place.
solvent leaving each thickener in the underflow will then be the same, and therefore the amount of solvent in the overflow will also be the same. Hence the ratio of the solvent discharged in the overflow to that in the underflow is constant. This will be taken as R, where: R = Amount of solvent discharge in overflow ...
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