Abstract
The presented results demonstrate the possibility of electrodialysis production of concentrated solutions of perrhenic acid (HReO4 concentration >400 g/l). KReO4 is used as a precursor. The investigations are performed in a three-chamber electrodialysis cell in a continuous mode. The optimal processing parameters are as follows: the current is 3–5 A, the voltage is 30–40 V, and the anode chamber temperature is 20–25°C. Grade AR-0 ammonium perrhenate is precipitated from the obtained HReO4 solution.
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