Process for producing fluorides of Mo, W, Nb, Ta, V, Re, Ti, Zr, Hf, Co, Ni, Cr, Sb, Sn, Zn, Pb, Al and rare earth metals comprising heating fluorine-containing ammonium salts of corresponding metals in a stream of an inert or reducing gas to convert them into fluorides of the metals.
대표청구항▼
A process for producing fluorides of Mo, W, Re, Co, Ni, Cr, Sb, Sn, Pb and rare earth metals, comprising bringing an organic solvent containing ions or complex ions of a metal selected from the group consisting of Mo, W, Re, Co, Ni, Cr, Sb, Sn, Pb and rare earth metals into contact with an aqueous s
A process for producing fluorides of Mo, W, Re, Co, Ni, Cr, Sb, Sn, Pb and rare earth metals, comprising bringing an organic solvent containing ions or complex ions of a metal selected from the group consisting of Mo, W, Re, Co, Ni, Cr, Sb, Sn, Pb and rare earth metals into contact with an aqueous solution containing F-ion and NH4+ion to transfer the metal ions or metal complex ions into the aqueous phase, said organic solvent being one selected from the group consisting of alkylphosphoric acid, alkyl aryl phosphoric acids, carboxylic acids, oximes, ketones, neutral phosphoric acid esters, and primary through quaternary amines, said solvent being diluted with a petroleum hydrocarbon to separate fluorine-containing ammonium salts from said aqueous solution and to simultaneously regenerate said organic solvent, and heating said fluorine-containing ammonium salts in a stream of inert or reducing gas to decompose said salts into fluorides of the corresponding metals and form NH4F or NH4HF2 gases.
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이 특허를 인용한 특허 (9)
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