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The role of intermediates in the process of red ferric pigment manufacture from FeSO4 center dot 7H(2)O

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F02%3A00001692" target="_blank" >RIV/61989592:15310/02:00001692 - isvavai.cz</a>

  • Alternative codes found

    RIV/61989592:15310/02:00007752

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    The role of intermediates in the process of red ferric pigment manufacture from FeSO4 center dot 7H(2)O

  • Original language description

    One method of industrial manufacture of red ferric pigments is based on the thermal decomposition of FeSO4.7H(2)O into alpha Fe2O3(copperas red). The difficult reproducibility of the color quality of the final pigment is the main problem of this process.One of the factors that can influence the pigment color is contamination by some of the intermediates formed during the transformation process. The identification of two groups of intermediates is the basic result of an extensive laboratory investigation carried out using Fe-57 Mossbauer spectroscopy and X-ray powder diffraction (XRD). The first group of intermediates includes sulfato-phases as FeSO4.H2O, FeSO4, Fe(OH) SO4, Fe2O(SO4)(2), Fe2O(SO4)(2).xH(2)O xis an element of(0, 1), and Fe-2(SO4)(3). Thermally metastable polymorphs of iron(III) oxide, beta-Fe2O3, gamma-Fe2O3 and epsilon-Fe2O3, represent the other group. Mossbauer characterization of all intermediate products is given. A significant influence of beta-Fe2O3 on the pigment

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    CF - Physical chemistry and theoretical chemistry

  • OECD FORD branch

Result continuities

  • Project

    <a href="/en/project/ME%20351" target="_blank" >ME 351: Mössbauer Study of Nanostructured Fe-O Particles</a><br>

  • Continuities

    Z - Vyzkumny zamer (s odkazem do CEZ)

Others

  • Publication year

    2002

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Hyperfine Interactions

  • ISSN

    0304-3843

  • e-ISSN

  • Volume of the periodical

    139/140

  • Issue of the periodical within the volume

    N

  • Country of publishing house

    NL - THE KINGDOM OF THE NETHERLANDS

  • Number of pages

    9

  • Pages from-to

    437-445

  • UT code for WoS article

  • EID of the result in the Scopus database