Recovery of molybdenum from molybdenum disulfide
A process is described for recovering molybdenum from molybdenum disulfide. The process consists of: (a) forming a slurry of the molybdenum disulfide in a solution of an alkali metal hydroxide, the amount of alkali metal hydroxide being sufficient to react with at least a portion of the molybdenum disulfide to form an alkali metal molybdate and an alkali sulfate; (b) heating the slurry in an oxidizing atmosphere at an elevated temperature and pressure and for a sufficient time to convert at least a portion of the molybdenum disulfide to the alkali metal molybdate and provide a pregnant liquor of the alkali metal molybdate and a residue; (c) separating the pregnant liquor from the residue; (d) adding a sufficient amount of a hexamine to the pregnant liquor to form an hexamine-molybdenum compound containing the major portion of the molybdenum which is in the pregnant liquor; (e) adjusting the pH of the resulting hexamine-treated pregnant liquor to from about 1.5 to about 3.8 to precipitate the major portion of the hexamine-molybdenum compound; and (f) separating the hexamine-molybdenum compound from the resulting mother liquor.
- Assignee:
- GTE Products Corp., Stamford, CT
- Patent Number(s):
- US 4599224
- OSTI ID:
- 5459519
- Resource Relation:
- Patent File Date: Filed date 22 Aug 1985
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
36 MATERIALS SCIENCE
MOLYBDENUM
MATERIALS RECOVERY
SOLVENT EXTRACTION
ALKALI METAL COMPOUNDS
AMINES
HEATING
HYDROXIDES
MOLYBDATES
MOLYBDENUM OXIDES
MOLYBDENUM SULFIDES
OXIDATION
PH VALUE
PRECIPITATION
PRESSURE DEPENDENCE
RESIDUES
SLURRIES
SULFATES
TEMPERATURE DEPENDENCE
TIME DEPENDENCE
CHALCOGENIDES
CHEMICAL REACTIONS
DISPERSIONS
ELEMENTS
EXTRACTION
HYDROGEN COMPOUNDS
MANAGEMENT
METALS
MIXTURES
MOLYBDENUM COMPOUNDS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PROCESSING
RECOVERY
REFRACTORY METAL COMPOUNDS
SEPARATION PROCESSES
SULFIDES
SULFUR COMPOUNDS
SUSPENSIONS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
WASTE MANAGEMENT
WASTE PROCESSING
400201* - Chemical & Physicochemical Properties
360101 - Metals & Alloys- Preparation & Fabrication