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铁锰结核的氨浸,美国肯奈科特公司首先申请了此法的专利(Beck R.B.等1971;Berner H.E.等1974,1975;AgaTwalJ.C.1976)称为“丘普里恩”法(Cuprionprocess)。因为转入溶液中的铜离子在还原二氧化锰的过程中积极参与:
Ammonia leaching of ferromanganese nodules, the United States Kennet Company first applied for this patent (Beck RB et al 1971; Berner HE et al 1974, 1975; AgaTwalJ.C.1976) called the “Cuprion process” (Cuprionprocess ). Because the copper ions transferred into the solution actively participate in the reduction of manganese dioxide: