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已获得了25℃时用 Alamine336和 DEHPA(二-2-乙基己基磷酸)从硫酸溶液中萃取钼与钨以及用 DEHPA 从硫酸溶液中提取钼-钨溶液的平衡数据。将萃取剂(10%体积)溶于煤油中,并用乙基己醇(2%体积)作调节剂。报道了钼的初始浓度在1～10克/升之间和钨在5～10克/升之间,萃取数据与初始 pH(下表为 pH°)、有机相与水相体积比和钨钼比的函数关系。Alamine336能萃取钼(pH°1～2)和钨(pH°3),产率较高,而 DEHPA 只能选择性萃取钼(pH°3)。在 pH°3和有机相与水相的体积比为1/2时,达到钨存在下萃钼的最好选择性。
Equilibrium data for the extraction of molybdenum and tungsten from sulfuric acid solutions with Alamine 336 and DEHPA (di-2-ethylhexylphosphoric acid) at 25 ° C and the molybdenum-tungsten solution from sulfuric acid solutions with DEHPA have been obtained. The extractant (10% by volume) was dissolved in kerosene and treated with ethylhexanol (2% by volume) as a regulator. The initial concentration of molybdenum between 1 and 10 g / L and between 5 and 10 g / L of tungsten have been reported. The extraction data are correlated with the initial pH (pH ° in the table below), the volume ratio of organic to aqueous phase, The ratio of the function. Alamine336 can extract molybdenum (pH ° 1 ~ 2) and tungsten (pH ° 3) with high yield, while DEHPA can only selectively extract molybdenum (pH ° 3). At pH ° 3 and the volume ratio of organic to aqueous phase of 1/2, the best selectivity for extracting molybdenum in the presence of tungsten is reached.