Rapid separation of heavy rare-earth elements

Details

• Personal Author:
  Froisland, Lawrence J. ; Moore, B. W. ; Petersen, A. E.
• Corporate Authors:
  United States. Bureau of Mines
• 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%." - NIOSHTIC-2
  
  NIOSHTIC no. 20026516
  
  
• Subjects:
  Occupational Health Safety
• Series:
  Mining Publications
• Subseries:
  Report of Investigations
• Document Type:
  Text
• Genre:
  Report
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  ii, 17 numbered pages
• NIOSHTIC Number:
  nn:20026516
• 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 ]