Report of Investigations 9564: Rapid Separation of Heavy Rare-Earth Elements

Details

• Journal Article:
  Salt Lake City, UT: U.S. Department of the Interior, Bureau of Mines, RI 9564
• Personal Author:
  Froisland, Lawrence J. ; Moore, Bruce W. ; Petersen, A. E.
• Description:
  The U.S. Bureau of Mines investigated the separation of heavy rate-earth elements (REE) in an ion exchange process. An ion-exchange column consisting of two sections, a loading section and a separation section, provides high 1evels of REE loading and good REE separation with an expected processing cycle of less than a month, while current ion-exchange technology requires more than 5 mouths. A different resin is used in each section: sulfonic resin in the loading section and iminodiacetic resin in the separation section. The separation section is further divided into two segments: the first conditioned with NH4 and the second with acid. Erbium is loaded onto both segments of the separation column as a retaining ion. Bands of mixed REE eluting between separated bands of pure REE were recycled directly to the columns. Without mixed-band recycle, over 80% of the REE eluted from the column was separated into fractions with 99% purity of each element; with such recycle, the percentage of separated elements can be increased to around 90%. [Description provided by NIOSH]
• Subjects:
  Chemistry Metals Minerals Mining Occupational Health Safety
• Keywords:
  Chemical-extraction; Chemical-reactions; Chemical-synthesis; Mining-industry
• Source:
  Salt Lake City, UT: U.S. Department of the Interior, Bureau of Mines, RI 9564, 1995 Jan; :1-17
• Series:
  NIOSH Numbered Publications   ; Mining Publications  
• Subseries:
  Report of Investigations
• Document Type:
  Text
• Genre:
  Report
• Place as Subject:
  OSHA Region 8 ; Utah
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  SLRC - Salt Lake City Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  23 pdf pages
• NIOSHTIC Number:
  nn:20026516
• NTIS Accession Number:
  PB95-251864
• Federal Fiscal Year:
  1995
• Peer Reviewed:
  False
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:43808e1d79f5174299d4b1325be95b1a4a24c9c0bedc3cc0410be6bd63601c99491bfbadd965579bb51a056ac10ffbba012d69a1da248f11a7496df1212df39d
• Download URL:
  https://stacks.cdc.gov/view/cdc/10214/cdc_10214_DS1.pdf
• File Type:
  [PDF - 2.58 MB ]