ABSTRACT
Solvent sublation is a kind of adsorptive bubble separation technique in which the surface-active (or hydrophobic) compounds in aqueous phase are adsorbed on the bubble surfaces of an ascending gas stream and then collected in an organic layer placed on top of the aqueous phase. The technique has many advantages, such as high separation efficiency, high concentration coefficient, low dosage of organic solvent, soft separation process, and simple operation. Thus, this technique has been widely applied in many fields. The present article reviews solvent sublation's theoretical research and some applications in the last 10 years, and gives the development trend in the future.
Subject(s)
Chemical Fractionation/methods , Models, Chemical , Solvents/chemistry , Hydrophobic and Hydrophilic Interactions , KineticsABSTRACT
The nature of palladium (I) and copper (II) is very similar, so it is very difficult to determine trace palladium (II) in the coexistence of a great quantity of copper (II). This paper applied ion floatation-spectrophotometric principle, using 1-(2-pyridylazo)-2-naphthol (PAN) as collector, and through controlling pH of the solution and determination wavelength, without separation to determine palladium (II) content in acetaldehyde catalyst with a great quantity of copper (II). The relative error was 0.61%, and RSD was 2.33%. The results were satisfactory.