Purification of Crude Ammonium Perrhenate from Potassium by Recrystallization, Sorption, and Membrane Electrodialysis

Resumo

The results of experiments on preparing pure (marketable) salt from crude salt of ammonium perrhenate are presented; the pure salt is rigidly standardized in elements–impurities and rhenium by recrystallization, sorption, and membrane electrodialysis. AP-0 salt is obtained from solutions purified from elements–impurities by recrystallization, AP-00 salt is obtained by sorption, and the salt purer than AP-00 is obtained by electrodialysis. The advantages and disadvantages of each of the methods are specified.