Results 31 to 40 of about 1,040,720 (337)
Leaching and recovery of gold from low grade raw materials in cyanide-free media
, 2021 Defence is held on 23.4.2021 10:00 – 13:00 Remote: https://aalto.zoom.us/j/69597217589Due to the toxicity and low efficiency of the dominant cyanide technology in the treatment of refractory gold ores, there is a growing demand for environmentally ...
Altinkaya, Pelin
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Cyanide leaching of gold catalysts
Catalysis Communications, 2015 Abstract Gold catalysts remain of great interest, but a high gold price presents a concern. Gold can be leached from gold–titania catalysts using alkaline cyanide solutions. The specific activity of gold for CO oxidation can thereby be increased substantially, though the precise nature of the gold before and after treatment remains unclear.
M.C. Raphulu, M.S. Scurrell
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ACS Omega, 2022 Refractory gold ore is usually affected by the associated carbonaceous matter through the preg-robbing effect, which is eliminated by oxidation roasting, followed by leaching, to achieve a satisfactory gold leaching efficiency.
Hui Li +4 more
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Kuangchan zonghe liyong, 2023 Gold resources in China are mainly concentrated in Shandong, Gansu, Xinjiang, Inner Mongolia, Henan and Yunnan Provinces, which are mainly composed of placer gold, rock gold and associated gold.
Man Qiu +3 more
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Thiosulphate leaching for gold hydrometallurgy
Hydrometallurgy, 1995 Thiosulphate leaching of precious metals has been developed as an alternative and non-toxic technique to the conventional cyanidation. This process has advantages over cyanide in a decreased interference from foreign cations and a lower environmental impact.
Abbruzzese C +4 more
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, 2020 The thiourea (TU) leaching of gold from refractory ores can be considered an alternative to cyanidation. However, the high reagent consumption causes an increase in cost, which seriously limits its use.
Rui Xu +7 more
semanticscholar +1 more source
Equilibrium, 2023 Gold is a very important metal in human life. Most gold is processed using the sodium cyanide (NaCN) leaching method. Maximizing the leaching recovery can be done by optimizing the leaching process parameters, one of which varies the concentration of ...
Frideni Yushandiana Putri GF +2 more
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Metals, 2021 Gold as a precious metal resource has high recycling significance. However, the current extraction methods cannot achieve the both efficiency and environmental friendliness.
Feng Feng +10 more
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Colorimetric determination of copper ions based on the catalytic leaching of silver from the shell of silver-coated gold nanorods [PDF]
, 2014 We have developed a method for the colorimetric determination of copper ions (Cu2+) that is based on the use of silver-coated gold nanorods (Au@Ag NRs).
Wang, Xiaokun, Chen, Lingxin, Chen, Ling
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The comparison of gold extraction methods from the rock using thiourea and thiosulfate
Open Chemistry, 2023 Gold extraction from the rock is generally carried out using mercury. However, the high toxicity of mercury has a very dangerous impact on the environment and health.
Yanti Ika +4 more
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