Recovery of tungsten and rhenium

Patent · Tue Jul 08 04:00:00 EDT 1986

OSTI ID:5399105

Douglas, A D; MacInnis, M B; Reilly, K T

A process is described for recovering tungsten and rhenium from a relatively impure tungsten and rhenium solution. The process consists of: (a) adjusting the pH of the relatively impure solution to from about 9.0 to about 10.0 to precipitate impurities contained therein and form a purified tungsten and rhenium solution, the pH adjustment from a value below about 9.0 being done with a base, and from a value above about 10.0 being done with a mineral acid; (b) separating the impurities from the purified solution; (c) adjusting the pH of the purified solution to from about 0.5 to about 7.0 with a mineral acid; (d) adding to the pH adjusted purified solution a solution containing sufficient hexamine to subsequently form a first hexamine tungsten solid containing the major portion of the tungsten the hexamine solution being at essentially the same pH as that of the pH adjusted purified solution; (e) agitating the resulting hexamine-tungsten-rhenium mixture at a sufficiently low temperature and for a sufficient time to form a first hexamine tungsten solid containing the major portion of the tungsten and a first mother liquor containing the major portion of the rhenium; and (f) separating the first solid from the first mother liquor.

• Assignee: GTE Products Corp., Stamford, CT
• Patent Number(s): US 4599222
• OSTI ID: 5399105
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101 -- Metals & Alloys-- Preparation & Fabrication
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
AMINES
DISPERSIONS
ELEMENTS
EXTRACTION
HYDROGEN COMPOUNDS
IMPURITIES
INORGANIC ACIDS
MANAGEMENT
MATERIALS RECOVERY
METALS
MIXTURES
ORGANIC COMPOUNDS
PH VALUE
PRECIPITATION
PROCESSING
PURIFICATION
RECOVERY
RHENIUM
SEPARATION PROCESSES
SOLUTIONS
SOLVENT EXTRACTION
TIME DEPENDENCE
TRANSITION ELEMENTS
TUNGSTEN
WASTE MANAGEMENT
WASTE PROCESSING