Recovery of Bismuth from Chloride Process Solutions

Details

• Personal Author:
  Carnahan, Thomas G. ; Flynn CM Jr. ; Lindstrom RE
• Description:
  Bismuth is recovered from a complex chloride leach solution by adding a stoichiometric amount of a precipitating agent such as hexammine cobalt(III) salts or hexammine chromium(III) salts to precipitate bismuth as a hexammine cobalt(III) bismuth salt or a hexammine chromium(III) bismuth salt. The precipitate is separated from the solution. Thus, 1 l of chloride leach solution containing Cu 25, Fe 90, Zn 2, Pb 0.6, and Bi 0.37 G/l at ph 2 and 20 deg C was treated with 0.55 G Co(NH3)6Cl3 in 15 ml H2O. The precipitated Co(NH3)6BiCl6 was flocculated, centrifuged, washed with 3-pct HCl, slurried with water, and treated with CaO to ph 10-11. The resulting mixture was centrifuged to recover Bi2O3 and CO(NH3)6Cl3- CaCl2 solution. Bismuth recovery was 90 pct and that of the cobaltammine was 85 pct. Copper precipitation was 0.03 g Cu/g Bi. [Description provided by NIOSH]
• Subjects:
  Chlorine Metals Occupational Health Safety
• Keywords:
  Bismuth Chlorides Metal Alloys Soluable Salts
• Series:
  Mining Publications
• Document Type:
  Text
• Genre:
  Other
• Place as Subject:
  Nevada ; OSHA Region 9
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  RERC - Reno Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1-3
• NIOSHTIC Number:
  nn:10006731
• Citation:
  US Pat 4,285,912 1981 Aug; :1-3
• CAS Registry Number:
  Bismuth (CAS RN 7440-69-9)
• Federal Fiscal Year:
  1981
• Peer Reviewed:
  False
• Source Full Name:
  United States Patent 4,285,912
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:8db3c881e0a087bd961a28bcf91f7a37803c460d188beee705c296e7d5f15b62fe0686628a6a5862a8d5403dfedad3acbd32cb5f52d2147c8f3aeedabaf143fc
• Download URL:
  https://stacks.cdc.gov/view/cdc/219771/cdc_219771_DS1.pdf
• File Type:
  [PDF - 307.37 KB ]