Process for recovering tungsten from tungsten bearing material containing arsenic

Patent · Tue May 03 04:00:00 EDT 1988

OSTI ID:7201518

Vanderpool, C D; Scheithauer, R A; MacInnis, M B

A process for recovering tungsten from tungsten bearing material containing arsenic, is described comprising: (a) adjusting a water slurry of the material to a pH of less than about 4 with an acid to solubilize the major portion of the tungsten; (b) adding to the resulting pH adjusted slurry a ferric compound capable of adsorbing arsenic without adsorbing appreciable amounts of tungsten, and insoluble in the pH adjusted slurry at a pH of less than about 4, to form a two phase system consisting essentially of a solid phase containing the major portion of the arsenic and of any phosphorus which may be present, and a solution phase containing the major portion of the tungsten; (c) separating the solid phase from the solution phase; (d) adjusting the pH of the solution phase to less than about 2 with an acid; (e) adding hexamethylenetetramine to the resulting pH adjusted solution phase in an amount sufficient to form a precipitate containing the major portion of the tungsten which is the solution; and (f) separating the precipitate from the resulting mother liquor.

• Assignee: GTE Products Corp., Stamford, CT
• Patent Number(s): US 4741886
• OSTI ID: 7201518
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ADDITIVES
AMINES
AQUEOUS SOLUTIONS
ARSENIC COMPOUNDS
COMPLEXES
DISPERSIONS
ELEMENTS
METALS
MIXTURES
ORGANIC COMPOUNDS
PH VALUE
PRECIPITATION
RECOVERY
SEPARATION PROCESSES
SLURRIES
SOLUTIONS
SUSPENSIONS
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENTS
TUNGSTEN
TUNGSTEN COMPLEXES