Report of Investigations 8320: Cobalt and Nickel Removal from Zinc Sulfate Electrolyte by Solvent Extraction and Precipitation Techniques

Details

• Personal Author:
  Hebble, Terry L. ; Sandberg, Richard G.
• Corporate Authors:
  United States. Bureau of Mines
• Description:
  Sphalerite concentrates prepared during processing of Missouri lead ores contain small percentages of cobalt and nickel which adversely affect zinc electrolysis. The Bureau of Mines has evaluated solvent extraction and precipitation techniques to remove and recover cobalt and nickel from zinc sulfate solution prior to zinc electrolysis. Prepared zinc sulfate solutions containing about 190 gpl of zinc and 50 ppm of both cobalt and nickel were treated using various combinations of complexing reagents, solvent, ph, concentration, time, and temperature. The following complexing reagents gave the best results: a-nitroso-b-naphthol, b-nitroso-a-naphthol, 1,2 cyclohexane dione dioxime (nioxime), di-2-pyridyl ketone oxime, and dimethylglyoxime. These reagents in suitable solvents lowered the cobalt and nickel levels to less than 0.1 Ppm. Stripping the complexed reagents from the solvents was not possible except for nioxime. Direct addition of the appropriate reagent to the prepared zinc sulfate solution resulted in the precipitation of cobalt and nickel. Several possible flowsheets are presented for the removal and recovery of cobalt and nickel. Good zinc deposits were successfully electrowon from zinc sulfate solutions purified by solvent extraction and precipitation. [Description provided by NIOSH]
• Subjects:
  Cobalt Metals Nickel Occupational Health Safety Zinc Compounds
• Series:
  Mining Publications
• Subseries:
  Report of Investigations
• ISSN:
  1066-5552 (print)
• Publisher:
  United States. Bureau of Mines
• Document Type:
  Text
• Genre:
  Case Report
• Place as Subject:
  Missouri ; OSHA Region 7
• Rights:
  Public Domain
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  RORC - Rolla Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  28 pdf pages
• NIOSHTIC Number:
  nn:10007885
• NTIS Accession Number:
  PB-289773
• Citation:
  NTIS: PB 289 773 :17 pages
• Federal Fiscal Year:
  1978
• Peer Reviewed:
  False
• Source Full Name:
  NTIS: PB 289 773
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:534cbd804649f5fd1e549f7029de982d2ac2cf56e3c98f87eb3f6da9622aa67f18d9916016c760f47ecd8197dfc3f84c4dbb1b001a203d6ced3f8e6e0207e3ed
• Download URL:
  https://stacks.cdc.gov/view/cdc/201880/cdc_201880_DS1.pdf
• File Type:
  [PDF - 939.88 KB ]