PROCEDURE FOR OBTAINING SCORODITE WITH A HIGH ARSENIC CONTENT FROM ACIDIC SOLUTIONS WITH HIGH CONTENT OF SULFURIC ACID

A technical problem that has not been solved, is that today there is no procedure by which a final residue containing scorodite stabilized with a high arsenic content, higher than 15 % from highly acidic solutions greater than 30 g/L of free acidity or pH below 1.0. The present invention provides a...

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Hauptverfasser: ACUNA GOYCOLEA MARCELO GUSTAVO, ROMAN ESPINOZA ENRIQUE ANSELMO, PEZOA CONTE RICARDO MIGUEL
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creator ACUNA GOYCOLEA MARCELO GUSTAVO
ROMAN ESPINOZA ENRIQUE ANSELMO
PEZOA CONTE RICARDO MIGUEL
description A technical problem that has not been solved, is that today there is no procedure by which a final residue containing scorodite stabilized with a high arsenic content, higher than 15 % from highly acidic solutions greater than 30 g/L of free acidity or pH below 1.0. The present invention provides a solution to this problem through a process that allows: the oxidation of trivalent arsenic and ferrous ion, simultaneous with neutralization of the acid solution to be treated, the precipitation of arsenic and oxidized ferric iron added in a molar ratio Fe:As determined at a defined pH, all of the above with a high efficiency of precipitation of arsenic as ferric arsenate or scorodite, obtaining a final residue stable in the long term, characterized by their higher content of arsenic in a lower volume compared with the procedures described in the state of the prior art. 一个尚未解决的技术问题是,目前没有这样的方法:由大于30g/L的游离酸度或低于1.0的pH强酸性溶液生产含有稳定具有高砷含量(高于15%)的臭葱石的最终残留物。本发明通过提供一种方法了该问题的解决方案,该方法允许:三价砷和亚铁离子的氧化,同时中和待处理的酸溶液,在规定的pH下以确定的Fe:As
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subjects CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
PRETREATMENT OF RAW MATERIALS
PRODUCTION AND REFINING OF METALS
TREATMENT OF ALLOYS OR NON-FERROUS METALS
title PROCEDURE FOR OBTAINING SCORODITE WITH A HIGH ARSENIC CONTENT FROM ACIDIC SOLUTIONS WITH HIGH CONTENT OF SULFURIC ACID
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