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Method for extracting rhenium and tungsten from wastes of rhenium-tungsten alloys

Patent ·
OSTI ID:6073127
; ;
Rhenium and tungsten are recovered from a rhenium tungsten alloy by electrochemically dissolving the alloy in substantially 4 to 5 normal sodium hydroxide to form a rhenium-containing solution, solvent extracting the rhenium-containing solution with an organic heteroatom-containing solvent (E.G. Pyridine) or acetone to form a second solution of the solvent containing rhenium, distilling the solvent from the second solution to form a raffinate containing rhenium, adding sulfuric acid to the raffinate to adjust the pH thereof to about 1, extracting tungsten from the raffinate with a solution of trioctylamine in kerosene containing octyl alcohol, and subjecting the raffinate containing sodium perrhenate to ion exchange to eventually convert it to ammonium perrhenate.
Assignee:
Institute Po Obshta I Neorganichna Chimia (Bulgaria)
Patent Number(s):
US 4278641
OSTI ID:
6073127
Country of Publication:
United States
Language:
English

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Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320305* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
36 MATERIALS SCIENCE
360101 -- Metals & Alloys-- Preparation & Fabrication
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400 -- Electrochemistry
ALCOHOLS
ALKALI METAL COMPOUNDS
ALLOYS
AMINES
ANODES
AZINES
CHELATING AGENTS
CHEMISTRY
ELECTROCHEMISTRY
ELECTRODES
ELEMENTS
EXTRACTION
FUELS
HETEROCYCLIC COMPOUNDS
HYDROGEN COMPOUNDS
HYDROXIDES
HYDROXY COMPOUNDS
INORGANIC ACIDS
ION EXCHANGE
KEROSENE
LIQUID FUELS
METALS
OCTANOLS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PETROLEUM PRODUCTS
PYRIDINE
PYRIDINES
REFRACTORY METALS
RHENIUM
RHENIUM ALLOYS
SEPARATION PROCESSES
SODIUM COMPOUNDS
SODIUM HYDROXIDES
SOLVENT EXTRACTION
SULFURIC ACID
TOA
TRANSITION ELEMENTS
TUNGSTEN
TUNGSTEN ALLOYS
WASTES