The uranium-vanadium separation was carried out in the apparatus described in Figure 2. The main difference was in the stripping devices that are connected to the foam column, D, by a glass joint. Test solutions, prepared as described above, were transferred to the foaming vessel, B, provided with a porous septum, e . The nitrogen flow, saturated with water in A , was started, to produce foam. Foam passed first into E, containing 10 ml. of 0.2M Versene solution, then into G containing 10 ml. of 2.ON HCl. Each run, conducted at a gas flow rate of 20 ml. per minute and room temperature (21 ' to 24' C . ) , was terminated after 6 hours' operation.
I t is evident from the summarized data of Table I1 that the extracted uranium and vanadium can be scrubbed from the foam and recovered separately in the stripping solutions.
Table II.
Stripping of Uranium and Vanadium St rijjing I . 0.2M 2N Extracted by Foam, versene II.HCI - ~ M.4. _ _ _ solution, solution, Scrubbed Foam, pg* U V V , mg. U, mg. U V 4.10 1.80 1.75 4.15
