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Method of separating metallic compounds.
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Procedimiento para el tratamiento acido continuo de arci- llas y esquistos crudos.
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Hydrometallurgical processing of precious metal ores
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Extraction of nickel from sulphide minerals
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Process for organic acid bioleaching of nickel ore
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Process for organic acid bioleaching of nickel ore
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1992-09-10
Process for producing electrolytic lead and elemental sulfur from galena
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1977-05-25
Process for extraction and separation of metals using liquid cation exchangers
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1932-12-20
Process for extracting metals from ores, minerals, and other materials
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Recovery of copper and or nickel from cupriferous and or nickeliferous material
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一种从含银锌精矿中提取银并提高锌精矿品质的方法
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1946-05-14
Recovery of nickel and ammonia
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1972-08-01
Process for winning metals
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1976-08-16
Procedimiento para producir cristales de gran pureza de sulfato de hierro monohidratado.
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Process for recovering copper and zinc from hydrothermal ore sludges
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A method of recovering base metals from low grade ores and residues
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1975-08-28
Recovery of metals
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1958-04-08
Process of eliminating nickel contained in solutions of mixed salts of cobalt and nickel
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Metal extraction (recovery systems)
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1957-01-22
Method of concentrating metal values from sulfur solutions
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1935-11-26
Process for differentially leaching ores to separate lead and other metals from zinc sulphide
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Verfahren zur Verarbeitung armer Kobalterze
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