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- W747768064 abstract "Rhenium (Re) was recovered as high purity ammonium perrhenate (APR) from a scrub liquor produced by a pilot plant treating 2000 m3/h of a fume discharged from a molybdenite roaster. The hydrometallurgical process adopted incorporates first a neutralisation stage using lime to remove most of Mo, all Cu, As and other minor contaminants to produce a liquor containing 260–280 mg/L Re and 80–90 mg/L Mo. Solvent extraction was subsequently used to first load the Re and Mo into a 10 v/v.% tertiary amine (Alamine 304–1), 10 v/v.% Isodecanol in 80% Anysol-150. The organic phase which contained typically 6.2 g/L Re and 1.29 g/L Mo was stripped with 30% ammonium hydroxide to yield a liquor containing 29.9 g/L Re and 5.63 g/L Mo. High purity APR (> 99.8% purity) was recovered from this liquor by adding sulphuric acid to pH 6.8. The whole process would provide an efficient method to recover at least 85% of Re produced from the roaster, with some loss probably incurred due to the re-condensation and/or re-crystallisation of gaseous Re oxide in the cool part of the fume extraction circuit." @default.
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- W747768064 date "2015-07-01" @default.
- W747768064 modified "2023-10-06" @default.
- W747768064 title "Recovery of rhenium from a molybdenite roaster fume as high purity ammonium perrhenate" @default.
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- W747768064 doi "https://doi.org/10.1016/j.hydromet.2015.06.008" @default.
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