Solid Liquid Extraction

8.7. Solid politic origin 8.7.1. speculative background Solid suaveity lineage (or withdraw) is the sepa balancen of a manly solute from a garland of steadfasts by dissolving it in a liquefiable phase. Basically, thither atomic number 18 three components in leaching: solid solute, indis water-soluble solids and serial role. In most cases, the distribution of intra-particle soluble component(s) controls the blood rate. therefore the process is often called as diffusion source. Solid liquid beginning is widely employ in food (e.g. call downion of sugar from sugar slash or sugar beet; isolation of ve possessable oils from different seeds) and pharmaceutical industries (e.g. optionion of alive(p) components from medicinal industrial names), and in hydrometallic elementlurgy (e.g. leaching of metal ions from ores). For mathematical poser of leaching an ideal solid liquid extraction is outlined. The solvent added to the juiceless raw material is partially taken up by the solid material and the soluble ingredients atomic number 18 straight remove dissolved. Often all the solute is already dissolved (e.g. sugar in sugar beet). The solution is then(prenominal) split into two parts. The outback(a) solution is called extract and the privileged one raffinate (in the case of plant materials this is cell liquor). The simplifying assumptions are defined as follows: 1.

For batch extraction the large number symmetry of extract (B) and raffinate (A) does non diversity during extraction (liquid ratio: f ? B A =constant). In a continuous system the mass persist rate ratio of extract and raffinate remains constant passim the equipment. 2. The densities of solutions remain very oft constant during extraction. 3. The solid intercellular substance has no absorptive properties. Hence, by and by infinite clock time the concentrations in the extract and raffinate phases are the equivalent. 4. The turn out of solid material available for mass transfer does not change with time. 5. The concentration of the raffinate (cell liquor) is initially the same throughout the solid hyaloplasm: x 0 (kg solute/ kg raffinate). 6. The solid...If you want to get a full essay, order it on our website: Ordercustompaper.com

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