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An experimental setup to mix crude oil with propane or other gases at high pressure and high temperature is described. The system permitted the injection of predefined volumes of oil and pressurized gas above its saturation pressure to get a homogeneous mixture and subsequent fractionation of the sample into a solid residue and a liquid extract. For propane, the solubility parameter prevailing in...
The removal of emulsified residual oil from water is an important issue due to the increasing concern with the environment. In the present paper various surface chemistry aspects of dissolved gas flotation were studied aiming at a better understanding of the mechanisms of the process. These studies included surface and interfacial tension measurements of a model system composed of n-dodecane in the...
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