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Dense hydrolysis products from iron (III) nitrate and sulfate solutions

Public Domain


Details

  • Personal Author:
    Flynn CM Jr.
  • Description:
    The U.S. Bureau of Mines studied the hydrolysis of fe(III) in no3- and so2/4- solutions at different temperatures to determine the conditions under which dense fe(III) precipitates form. Solutions of known composition made from reagent chemicals were maintained in controlled-temperature baths, and changes in color and formation of solid phases were observed as a function of time. Solids were isolated and characterized by x-ray powder diffraction or infrared spectroscopy. Dense fe(III) precipitates are obtained in fe(no3)3 solutions especially at temperatures greater than or equal to 60 deg c in acidified solutions. At lower acidities, colloids, a cationic hydrolytic polymer, or gelatinous precipitates form. In so2/4- - containing solutions a dense amorphous basic ferric sulfate (dabfs) of compositions fe4(oh)10 so4.Xh2o (x = 2 to 3) forms at lesser than or equal to 40 deg c from solutions with so2/4- and fe3+ concentrations lesser than or equal to 0.2 M and mole ratio so2/4- /fe(III) greater than or equal to 0.5. Chemical observations showed that dabfs is related to the fe(III) cationic hydrolytic polymer. [Description provided by NIOSH]
  • Subjects:
  • Series:
    Mining Publications
  • ISSN:
    0304-386X
  • Document Type:
    Text
  • Genre:
    Journal Article
  • Place as Subject:
  • CIO:
    National Institute for Occupational Safety and Health (NIOSH)
  • Division:
    RERC - Reno Research Center
  • Topic:
    Workplace Safety & Health
  • Location:
    North America
  • Pages in Document:
    257-270
  • Volume:
    25
  • Issue:
    2
  • NIOSHTIC Number:
    nn:10008637
  • Citation:
    Hydrometallurgy 1990 Jan; 25(2):257-270
  • Contact Point Address:
    C.M. Flynn, Jr., Reno Research Center, Bureau of Mines, U.S. Department of Interior, Reno, Nevada, 89512-2295 (U.S.A.)
  • Federal Fiscal Year:
    1990
  • Peer Reviewed:
    False
  • Source Full Name:
    Hydrometallurgy
  • Collection(s):
  • Main Document Checksum:
    urn:sha-512:3372ff37c6faa21b03227563876604383ff59a04d28853c3d23ec3f151cf15dbd010fb21205a5bb78cf99010f16d6ab1fbbe4060757478f35850e58a1d8822a6
  • Download URL:
  • File Type:
    Filetype[PDF - 736.34 KB ]
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