RI 6457 Solvent Extraction Recovery of Thorium and Yttrium from Siliceous Colorado Ores
- Organization:
- The National Institute for Occupational Safety and Health (NIOSH)
- Pages:
- 23
- File Size:
- 3320 KB
- Publication Date:
- Jan 1, 1964
Abstract
Thorium 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 - ethylhexyl phosphoric acid . About
95 pct of the contained thorium and yttrium was recovered from ore containing
1.2 pct Th02 and 0.5 pct Y₂ 03. The thoria product was 99 pct Tho ; the
yttria product was 77 pct Y₂ 03. A 150 - to - 1 concentration ratio was effected
on the latter , but some contaminating lanthanon - group oxides remained .
Citation
APA: (1964) RI 6457 Solvent Extraction Recovery of Thorium and Yttrium from Siliceous Colorado Ores
MLA: RI 6457 Solvent Extraction Recovery of Thorium and Yttrium from Siliceous Colorado Ores. The National Institute for Occupational Safety and Health (NIOSH), 1964.