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获得了用Alamine336和DEHPA(二-2-乙基己基磷酸)从硫酸溶液中萃取钼和钨,以及用DEHPA从钼钨硫酸溶液中选择性萃取钼和钨的平衡数据(25℃)。萃取剂(10％体积)用煤油稀释,用2-乙基已醇(2％体积)作改良剂。报道了初始钼浓度(1—10g/L)和初始钨浓度(5—10g/L)随初始pH、有机相/水相体积比和钨/钼比变化的萃取数据。Alamine336对钼(pH°1—2)和钨(pH°3)的萃取效率都很高,而DEHPA在pH°3时可选择性萃取钼。在pH°3和有机相/水相体积比为1/2时,从钨钼溶液中萃取钼的选择性最好。
The equilibrium data (25 ° C.) for the extraction of molybdenum and tungsten from sulfuric acid solution with Alamine 336 and DEHPA (di-2-ethylhexylphosphoric acid) and the selective extraction of molybdenum and tungsten from molybdenum tungsten sulfuric acid solution with DEHPA were obtained. The extractant (10% by volume) was diluted with kerosene and treated with 2-ethylhexanol (2% by volume) as modifier. The extraction data of initial molybdenum concentration (1-10 g / L) and initial tungsten concentration (5-10 g / L) with initial pH, organic / aqueous phase volume ratio and tungsten / mol ratio were reported. Alamine 336 has a high extraction efficiency for molybdenum (pH ° 1-2) and tungsten (pH ° 3), while DEHPA selectively extracts molybdenum for pH ° 3. At pH ° 3 and the organic / aqueous phase volume ratio of 1/2, molybdenum extraction from tungsten and molybdenum solutions is most selective.