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Density of Fluids - Essay Example

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Among the commonly used methods is the use of float sinks which employs the principle of relative density. This principle was developed and patented in United States (Jody, Daniels &…
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Density of Fluids
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Download file to see previous pages The solution preferred for this process was an alkali metal salt or an alkaline earth metal salt of metatungstate. The solution should have a concentration of 1 to 80. The oxidant used is preferably selected from any of the following dichromate, chromate, nitrate, permanganate, peracid and perester group (Allies & Pagenkopf, 1998). These should have a preferred concentration of 0.05 to 0.5 weight %.
The preferred alkaline salts are salts of lithium or sodium namely sodium dihydrogendodecawolframate or lithium dihydrogendodecawolframate .However, sodium dihydrogendodecawolframate is preferentially used. According to the invention bringing the solid mixture into contact with the separating liquid is advantageous. These liquid should be of differing density in gradations of 0.005 g/cm.sup.3 to 0.1 g/cm.sup.3, preferably 0.05 g/cm.sup.3 to 0.01 g/cm.sup.3 (Jody, Daniels & Pomykala , 2003).Within a selected region of the density range the the sinking solid component is removed after each stage.
Besides this solution, other solution that have been used in separation of mixtures include ethanol or solutions containing ethanol, Ca(NO 3) 2, CaCl 2 ZnCl 2.or NaCl. All thse method rely on the relative buoyancy of the separating ...Download file to see next pagesRead More
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