1 Ocak 2011 Dergi makalesi Açık Erişim

Gonen, Mehmet; Balkose, Devrim; Ulku, Semra

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  <identifier identifierType="URL">https://aperta.ulakbim.gov.tr/record/18361</identifier>
  <creators>
    <creator>
      <creatorName>Gonen, Mehmet</creatorName>
      <givenName>Mehmet</givenName>
      <familyName>Gonen</familyName>
      <affiliation>Suleyman Demirel Univ, Engn &amp; Architecture Fac, Dept Chem Engn, TR-32260 Isparta, Turkey</affiliation>
    </creator>
    <creator>
      <creatorName>Balkose, Devrim</creatorName>
      <givenName>Devrim</givenName>
      <familyName>Balkose</familyName>
      <affiliation>Izmir Inst Technol, Dept Chem Engn, TR-35430 Izmir, Turkey</affiliation>
    </creator>
    <creator>
      <creatorName>Ulku, Semra</creatorName>
      <givenName>Semra</givenName>
      <familyName>Ulku</familyName>
      <affiliation>Izmir Inst Technol, Dept Chem Engn, TR-35430 Izmir, Turkey</affiliation>
    </creator>
  </creators>
  <titles>
    <title>Supercritical Ethanol Drying Of Zinc Borates Of 2Zno Center Dot 3B(2)O(3)Center Dot 3H(2)O And Zno Center Dot B2O3 Center Dot 2H(2)O</title>
  </titles>
  <publisher>Aperta</publisher>
  <publicationYear>2011</publicationYear>
  <dates>
    <date dateType="Issued">2011-01-01</date>
  </dates>
  <resourceType resourceTypeGeneral="Text">Journal article</resourceType>
  <alternateIdentifiers>
    <alternateIdentifier alternateIdentifierType="url">https://aperta.ulakbim.gov.tr/record/18361</alternateIdentifier>
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  <relatedIdentifiers>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsIdenticalTo">10.1016/j.supflu.2011.08.004</relatedIdentifier>
  </relatedIdentifiers>
  <rightsList>
    <rights rightsURI="http://www.opendefinition.org/licenses/cc-by">Creative Commons Attribution</rights>
    <rights rightsURI="info:eu-repo/semantics/openAccess">Open Access</rights>
  </rightsList>
  <descriptions>
    <description descriptionType="Abstract">Supercritical ethanol (SCE) drying of zinc borates was investigated to obtain dry zinc borate nanoparticles and to elucidate possible chemical interactions between zinc borates and ethanol. Commercial and synthesized 2ZnO center dot 3B(2)O(3)center dot 3H(2)O and ZnO center dot B2O3 center dot 2H(2)O samples were dried by both conventional and SCE drying methods and the products were compared. Zinc borates were characterized using X-ray powder diffraction (XRD), thermo gravimetric analysis (TGA), Fourier transform infrared (FTIR) analysis, transmission electron microscopy (TEM), scanning electron microscopy (SEM) and helium pycnometer. Zn and B contents of samples were also determined by analytical titration. It was found that zinc borate of ZnO center dot B2O3 center dot 2H(2)O decomposed completely into zinc oxide and boric acid. However, zinc borate having oxide formula of 2ZnO center dot 3B(2)O(3)center dot 3H(2)O decomposed partially to form anhydrous zinc borate, zinc oxide, water and boric acid during the SCE drying carried out at 250 degrees C and 6.5 MPa. Boric acid and water were extracted from both of zinc borates by supercritical ethanol. The extraction of boric acid by ethanol in the SCE drying of zinc borates is an important result which can be utilized in the production of boric acid from water insoluble natural minerals, e.g. colemanite. The boric acid-ethanol solution could be directly utilized in the synthesis of ethyl borate. (C) 2011 Elsevier B.V. All rights reserved.</description>
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