PURE COLUMBIUM AND TANTALUM OXIDES BY LIQUID-LIQUID EXTRACTION

Journal Article · Wed Jun 01 04:00:00 EDT 1960 · J. Metals

OSTI ID:4138833

Carlson, C W; Nielsen, R H

A system for the plant-scale separation of Nb and Ta in ores and preparation of their oxides was developed and put into operation at the Albany, Oreg., plant of Wah Chang Corp. Its principle is the extraction of the acid fluorides of Ta from a H/sub 2/SO/sub 4/-HF aqueous phase by a hexone phase. subsequent precipitation of the separated Nb and Ta by 28% NH/sub 3/, and their calcination to the oxides. The mixing of the phases is done in three pulse-plate column units of all-polyethylene construction. The equipment aind steps in the plant-scale operation are described in detail, and flow sheets are given for both pilot and plant operations. A table of typical annlyses of impurities in the Nb and Ta oxides is presented: in no case did the content of any impurity exceed 600 ppm. Oxides of Nb and Ta of the same order can be produced from ores having a Nb/ Ta ratio from 4: I to 1:4 and a combined Nb-Ta oxide content of more than 30%. (D.L.C.)

• Research Organization: Wah Chang Corp., Albany, Ore.
• NSA Number: NSA-14-015705
• OSTI ID: 4138833
• Journal Information: J. Metals, Journal Name: J. Metals Vol. Vol: 12
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ALBANY
AMMONIA
CHEMISTRY
COMBUSTION
HYDROFLUORIC ACID
IMPURITIES
MIXING
NIOBIUM OXIDES
ORES
PRECIPITATION
SEPARATION PROCESSES
SOLVENT EXTRACTION
SULFURIC ACID
TANTALUM FLUORIDES
TANTALUM OXIDES