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Precipitation of Germanium from Sulphate Solutions Containing Tin and Indium Using Tannic Acid
The precipitation of tannin complex of germanium from sulfuric solutions obtained after dross leaching was investigated. The tested solutions contained mainly zinc, germanium, indium, and tin. The influence of temperature, time, amount of added tannic acid and its purity was determined. The application of pure tannic acid allowed the precipitation of >99% of germanium and decreased its concentration in a solution <0.015 g/dm3. It required ca. 11–13 g of pure tannic acid per each 1 g ofdoi:10.3390/app9050966 fatcat:2vfiprqacvbojiyoxuzcf55yie