Ardibash
Well-known member
Hey guys, any one knows anything about this process?
"The method of extraction of silver from scrap of plasma TV monitors using noncyanide reagents – sodium thiosulfate and acidothiourea – was investigated, which was followed by silver recovery from acidothiourea leach solutions. It was found that acidothiourea solution gave almost complete extraction of silver while thiosulfate provided only 40% extraction. The rate of silver extraction using acidothiourea solution was found to be extremely fast. An increased dissolution rate was also found at elevated temperature. The recovery of silver through coagulation-precipitation from acidothiourea leach solutions was carried out with a natural biodegradable material, persimmon tannin extract. It was proved to be a promising material for complete silver recovery. Besides, precipitative recovery of silver by means of cementation with zinc powder was conducted. It was found that simple cementation with zinc powder exhibits a very good precipitative property for which it could be used in hydrometallurgical processing."
"The method of extraction of silver from scrap of plasma TV monitors using noncyanide reagents – sodium thiosulfate and acidothiourea – was investigated, which was followed by silver recovery from acidothiourea leach solutions. It was found that acidothiourea solution gave almost complete extraction of silver while thiosulfate provided only 40% extraction. The rate of silver extraction using acidothiourea solution was found to be extremely fast. An increased dissolution rate was also found at elevated temperature. The recovery of silver through coagulation-precipitation from acidothiourea leach solutions was carried out with a natural biodegradable material, persimmon tannin extract. It was proved to be a promising material for complete silver recovery. Besides, precipitative recovery of silver by means of cementation with zinc powder was conducted. It was found that simple cementation with zinc powder exhibits a very good precipitative property for which it could be used in hydrometallurgical processing."