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·The most likely scenario for the formation of silver fulminate occurs when wet silver powder containing some silver nitrate or nitric acid is dried by displacement washing with ethanol In the presence of nitric acid the formation of fulminic acid takes place in the following steps The oxidation of ethanol to acetaldehyde
·A sustainable and effective sulfuric acid based process with the combination of facile acid leaching and electrowinning has been developed for the recovery of valuable elements from spent silver
·Abstract The results of platinum extraction from a low concentration nitric acid platinum containing solution by sulfide and electrolytic precipitation are presented The problem of the study is the question about a possibility of platinum IV extraction from refining nitric acid mother liquors of a complicated ionic and quantitative composition The best result for platinum
·Table 3 summarizes the parameters and the obtained results for silver and gold extraction and recovery Silver was recovered from the pregnant solution by % via N 2 H 4 reduction The recovery of gold via N 2 H 4 reduction reached % The purity of the produced silver and gold precipitates was determined at % and % respectively
·The extraction and recovery of Ag from Ag containing waste materials has become necessary It was reported that 25% of the global demand of Ag is supplied by recycling and photographic wastes represent 75% of the total volume of Ag containing waste materials being recovered Aktas et al 2010 Photography is still a large consumer of Ag in the form of
·The extraction of gold from its ores and its recycling from waste materials represent significant technological and environmental challenges 1 2 3 to the current industrial practice
concentrated nitric acid Cyanide and chloride leaching have also been studied as an alternative to this technique Recovery of silver from these leaching solutions was investigated by both solvent extraction3 6 and ion exchange 9 The solvent extraction process offers signi˚cant advantag
·In addition to nickel limonite ore typically contains % cobalt 5% magnesium oxide and 40 50% Leaching of limonite ore in acid solutions such as sulfuric hydrochloric and nitric acid would result in a pregnant solution that contains nickel cobalt iron magnesium and some other elements in lower concentrations such as
·Copper is extensively utilised in electrical materials architecture mechanical electronic and military industries The demand of copper products in the world has been increased due to the progress in science and technology and the development of economy [1 2] Copper is found principally in nature in the form of oxide and sulphide minerals such as malachite
·In this study the silver extraction potential from waste x ray films using sodium hydroxide and nitric acid was studied Sodium hydroxide and nitric acid of different concentrations were used as
· Materials and reagents All the reagents used in the experiment such as sulfuric acid H 2 SO 4 nitric acid HNO 3 copper sulfate CuSO 4 sodium thiosulfate Na 2 S 2 SO 3 and sodium hydroxide NaOH were analytically pure and the water used in the whole experiment was deionized water with the electrical resistivity of MΩ The refractory
·The laterite ore consists of a limonitic ore layer a transitional layer and a saprolitic layer from top to bottom [6] The composition of each layer varies greatly among which the saprolitic laterite ore SLO has the characteristics of high Si Mg and low Fe content [7] For the treatment of SLO the traditional process is to produce Ni Fe alloy through pyrometallurgy
·Silver Metal Extraction from Refractory Silver Ore Using Chloride Hypochlorite and Hydrochloric Acid Media Under High Pressure January 2021 Mining Metallurgy & Exploration 38 3
·The electrolyte in this process is made up of 3% silver in the form of silver nitrate 2% free nitric acid and a little liquid glue with the purpose of toughening the silver deposit on the cathode
·Silver forms fairly insoluble sulfate s so we need a purer nitric acid free of sulfates where possible for use with silver Some sulfates in nitric or aqua regia are not a problem for gold or most base metals and the sulfate could be somewhat helpful as it makes lead insoluble in the gold chloride solution
·Effect of temperature on extraction a silver and b copper from Ag Cu alloy having a particle size of 75∼150 µm with mol/L HNO 3 and a stirring rate of 250 r/min
·Sulfuric acid concentrations of 2 8 M resulted in initial and final copper recoveries of 15% and 22% respectively Nitric acid in concentrations from to 14 M yielded maximum copper extraction at M achieving 71% Cu recovery with around 50% recovery within the 3 9 M HNO 3 range The other acids except ascorbic acid achieved
·The leaching of rare earth elements REEs including cerium lanthanum and neodymium from apatite concentrate obtained from iron ore wastes by nitric acid was studied The effects of nitric acid concentration solid to liquid ratio and leaching time on the recoveries of Ce La and Nd were investigated using response surface methodology The
·Qing hua et al 2012 developed a combined novel process to extract silver from manganese silver ore The preferential dissolution of manganese from the primary materials was achieved through reductive leaching in dilute sulfuric acid medium with sodium sulfite as reductant Stripping of adsorbed silver by 2 M nitric acid at 85
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·The purpose of this study was to liberate gold from sulfide minerals in a gold concentrate through microwave nitric acid leaching and to separate the light minerals in an insoluble residue using a
·I have also just found out that when lead nitrate is dropped with chlorides the nitric acid is regenerated so I thinking it might be possible to reuse the same solution depending on some factors I have plenty of time 15kg of ore therefore 15oz silver $300 a little bit of money And I am seeking to extract a pure silver button
·This appears to be a sulfide/sulfate based ore If the ore was pre treated prior to leaching with a nitric wash would this also dissolve the PGMs I was thinking of roasting the ore at 1000 degrees for 15 minutes prior to adding the nitric and then washing really well with DI water before performing the HCl/Cl leach Thanks for any thoughts on
