Abstract

A continuous foam fractionation column in the simple mode is used to treat the dilute aqueous solutions of a surface active solute, benzyl-dimethyl-cetylammonium chloride. The drainage of the interstitial liquid makes the foam column more effective. This is because it not only serves as the internal reflux but also reduces the amount of bulk solution carried in the overflowing foam. Higher feed concentration and higher gas flow rate reduce the drainage of the interstitial liquid and thus are unfavorable to the separation capability of the foam fractionation column.

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