Acid sulfation of alunite

Details

• Personal Author:
  Froisland, Lawrence J. ; Harbuck, D. D. ; Wouden, Marinus L.
• Corporate Authors:
  United States. Bureau of Mines
• Description:
  "The U.S. Bureau of Mines conducted laboratory studies on sulfuric acid (h2so4) digestion of alunite [kal3(so4)2(oh)6] as a means for treating domestic deposits of this mineral. Digesting alunite ore in boiling h2so4 at concentrations of 88-wt-pct acid or higher breaks down the alunite and permits a convenient separation of potassium and aluminum. The digestion reaction is a complex sulfation reaction occurring in two stages. In this reaction, the potassium component extracts into the h2so4 for eventual recovery as potassium sulfate (k2so4) in a separate unit operation. Aluminum is left as acid-insoluble aluminum sulfate [al2(so4)3], which can be extracted by a 95 deg. C water leach. Additional purification of al2(so4)3 produced in this study is needed to meet cell-grade alumina (al203) purity specifications. Extraction and separation of potassium and aluminum from the alunite ore were consistently above 90 pct." - NIOSHTIC-2
  
  NIOSHTIC no. 10006814
  
  
• 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, 12 numbered pages
• NIOSHTIC Number:
  nn:10006814
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:2c76b6408a10dee8bf50e115e7a17efaf41adc0b6a99dcae68d8ccbc9f35f270ca79592561260a5aface94f08831b6774feaf7d38e51322025515a57274eeced
• Download URL:
  https://stacks.cdc.gov/view/cdc/10297/cdc_10297_DS1.pdf
• File Type:
  [PDF - 1.03 MB ]