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A study on extraction of copper using LIX 84-1 and LIX 622N

机译：LIX 84-1和LIX 622N提取铜的研究

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摘要

The bulk sulphide precipitate obtained after addition of Na2S to the Fe- and Mn-free leach liquor of manganese nodule was leached with H2SO4 and the leach liquor contained 13 kg/m~3 copper, 15.6 kg/m~3 nickel, 2.6 kg/m~3 cobalt, 2.6 kg/m~3 zinc and 13.0 kg/m~3 Na2SO4. Extraction of copper from this leach liquor was carried out with the extractants LIX 84-1 and LIX 622N in kerosene. Extraction of copper increased with increasing equilibrium pH and extractant concentration with both the extractants. The quantitative extraction of copper was obtained in 4-stages at A:0 ratio of 3:4 with 25% LIX 84-1 and in 3-stages at 1:1 phase ratio with 25% LIX 622N. The counter-current extraction study showed 0.032 and 0.015 kg/m~3 copper in the raffinate with LIX 84-1 and LIX 622N indicating 99.75 and 99.88% extraction, respectively. The stripping of copper loaded LIX 84-1 and LIX 622N increased with increasing H2SO4 concentration (10-120 kg/m~3), but stripping of the latter was lower than the former. The stripping studies carried out with the copper spent electrolyte showed quantitative stripping of copper from the loaded organic in 3-stages at 0:A ratio of 2:1 with both the extractants. The effect of various diluents such as cyclohexane, n-hexane, toluene, kerosene and xylene on extraction of copper was studied including the study of synergism due to the solvents.
机译：将Na2S加入到锰结核的无铁和无锰浸出液中后，得到的块状硫化物沉淀用H2SO4浸出，浸出液含13 kg / m〜3铜，15.6 kg / m〜3镍，2.6 kg / m〜3钴，2.6 kg / m〜3锌和13.0 kg / m〜3 Na2SO4。用浸出剂LIX 84-1和LIX 622N在煤油中从浸出液中萃取铜。铜的萃取量随着两种萃取剂的平衡pH和萃取剂浓度的增加而增加。使用25％LIX 84-1时，以3：4的A：0比例以4阶段获得铜的定量萃取，使用25％LIX 622N时以1：1的相比以3阶段获得铜的定量萃取。逆流萃取研究表明，萃余液中铜的含量为0.032和0.015 kg / m〜3，LIX 84-1和LIX 622N分别表明萃取率为99.75和99.88％。随着H2SO4浓度（10-120 kg / m〜3）的增加，负载铜的LIX 84-1和LIX 622N的汽提量增加，但后者的汽提率低于前者。用废铜电解质进行的汽提研究表明，两种萃取剂均以3：0的比例从负载的有机物以3：2的比例进行了铜的定量汽提。研究了各种稀释剂（例如环己烷，正己烷，甲苯，煤油和二甲苯）对铜萃取的影响，包括研究了由于溶剂引起的协同作用。

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