Technological and Economic Problems of Rare-earth Metal and Thorium Resources in Colorado, New Mexico, and Wyoming
Author: Francis Joseph Kelly
Publisher:
Published: 1962
Total Pages: 46
ISBN-13:
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Mineral and Water Resources of New Mexico
Author: Geological Survey (U.S.)
Publisher:
Published: 1965
Total Pages: 458
ISBN-13:
DOWNLOAD EBOOKMineral and Water Resources of New Mexico
Author: United States. Congress. Senate. Interior and Insular Affairs
Publisher:
Published: 1965
Total Pages: 464
ISBN-13:
DOWNLOAD EBOOKMineral and Water Resources of California: Mineral resources
Author: Geological Survey (U.S.)
Publisher:
Published: 1966
Total Pages: 478
ISBN-13:
DOWNLOAD EBOOKMineral and Water Resources of California
Author: Geological Survey (U.S.)
Publisher:
Published: 1966
Total Pages: 698
ISBN-13:
DOWNLOAD EBOOKHearings, Reports and Prints of the Senate Committee on Public Works
Author: United States. Congress. Senate. Committee on Public Works
Publisher:
Published: 1963
Total Pages: 1420
ISBN-13:
DOWNLOAD EBOOKMineral Facts and Problems
Author: United States. Bureau of Mines
Publisher:
Published: 1970
Total Pages: 1306
ISBN-13:
DOWNLOAD EBOOKSolvent Extraction Recovery of Thorium and Yttrium from Siliceous Colorado Ores
Author: Samuel Ralph Borrowman
Publisher:
Published: 1964
Total Pages: 24
ISBN-13:
DOWNLOAD EBOOKThorium and yttrium oxides were recovered from siliceous ores of the Powderhorn, Colo., area. Processing comprised (1) acid curing and subsequent (2) acid baking, (3) leaching, and (4) solvent extraction of thorium, using a primary alkylamine, and yttrium, using di-2-ethylhexy1 phosphoric acid. About 95 pct of the contained thorium and yttrium was recovered from ore containing 1.2 pct ThO2 and 0.5 pct Y2O3. The thoria product was 99 pct ThO2 ; the yttria product was 77 pct Y2O3. A 150-to-1 concentration ratio was effected on the latter, but some contaminating lanthanon-group oxides remained.
