Abstract
With the separation of ammonia from dilute aqueous solutions as an example, relationships for the design of a liquid membrane process based on the principle of double emulsions will be given in this paper for the case of a stirred countercurrent flow column. The advancing front model in its pseudo steady-state form has been employed for the calculation of mass transport in the emulsion drops. Backmixing in the column has been taken into account by employing a simple two layer dispersion model. Experiments have been carried out with a stirred countercurrent flow column of 67 mm inner diameter and an active length of 1.8 m. The experimental results confirm that the calculations are sufficient for design pruposes.
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