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Extraction and Recovery of Molybdenum and Rhenium from Molybdenite Concentrates by Electrooxidation: Process Demonstration.

Authors
Scheiner-BJ; Lindstrom-RE; Pool-DL
Source
NTIS: PB 255 399 :12 pages
Link
NIOSHTIC No.
10007771
Abstract
The federal Bureau of Mines has successfully demonstrated an electrooxidation-solvent extraction-carbon adsorption process for recovering molybdenum and rhenium from offgrade concentrates. The flow sequence consists of dissolution of metal values by electrooxidation, liquid-solid separation by thickening, acidification and chlorate ion removal by sulfur dioxide treatment, solvent extraction to concentrate the molybdenum and rhenium, separation of molybdenum and rhenium by carbon adsorption, and metal recovery by crystallization. Molybdenum and rhenium were recovered as ammonium paramolybdate and ammonium perrhenate. Electrolysis of brine-concentrate pulps to generate a hypochlorite oxidizing agent in situ resulted in the dissolution of 98.9 and 99.1 pct of the molybdenum and rhenium, respectively, at an energy consumption of 13.7 Kwhr/lb of molybdenum extracted.
Publication Date
19760101
Document Type
IH; Report of Investigation;
Fiscal Year
1976
NTIS Accession No.
PB-255399
NTIS Price
A03
Identifying No.
RI 8145
NIOSH Division
RERC;
Source Name
NTIS: PB 255 399
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