PROCEDEU DE OBTINERE A CLORURII DE ZINC-AMONIU

摘要

The process of the general formula 2ZnCl1-mNH4Cl,nNH3, where m=1-4 and n=1-2. Waste zinc oxide material is contacted with 35% concentration hydrochloric acid to solubilise the zinc. The resulting solution is purified relative to iron by oxidisation and neutralisation with filtration. Then the stoichiometric amounts of ammonium chloride and ammonia are introduced to obtain double zinc and ammonium salts. The solution is concentrated by boiling, and coled to crystalise the salts for filtration, centrifugation and drying in hot air.