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Synthesis of nanosized Cr2O3 from turkish chromite concentrates with sodium borohydride (NaHB4) as reducing agent

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dc.contributor.authorAKTAŞ, SERDAR
dc.contributor.authorsMorcali, Mehmet Hakan; Eyuboglu, Cagri; Aktas, Serdar
dc.date.accessioned2022-03-12T20:28:24Z
dc.date.available2022-03-12T20:28:24Z
dc.date.issued2016
dc.description.abstractIn this work, we investigated chromium extraction using a pyrometallurgical process and the subsequent production of nano-sized chromium oxide from Turkish chromite concentrate by assessing the effects of the base amount, fusion temperature, and fusion time on the chromium conversion. Nano-sized chromium oxide (Cr2O3) can be employed in many applications, such as catalysis, wear resistant materials, and advanced colorants, etc. To convert Cr(III) to Cr(VI) in the form of potassium chromate, potassium hydroxide (KOH) was employed under air flowing at a rate of 20.0 L/min. The kinetics of conversion from Cr(III) to Cr(VI) were also explored. Dissolution of the resulting potassium chromate in distilled water and pH neutralization afforded precipitation of aluminum hydroxide, which could be removed by filtration. The Cr(VI) in solution was subsequently converted to Cr(III) using sodium borohydride. The resulting chromium hydroxide was converted to nano sized chromium oxide by heating at ambient pressure and temperatures between 1073 K and 1473 K. Heating to lower temperatures was found to be associated with a smaller particle size. (C) 2016 Elsevier B.V. All rights reserved.
dc.identifier.doi10.1016/j.minpro.2016.08.018
dc.identifier.eissn1879-3525
dc.identifier.issn0301-7516
dc.identifier.urihttps://hdl.handle.net/11424/233909
dc.identifier.wosWOS:000390506600002
dc.language.isoeng
dc.publisherELSEVIER SCIENCE BV
dc.relation.ispartofINTERNATIONAL JOURNAL OF MINERAL PROCESSING
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectChromium
dc.subjectChromite Concentrate
dc.subjectSodium Borohydride
dc.subjectReduction
dc.subjectMECHANICAL ACTIVATION
dc.subjectPOTASSIUM HYDROXIDE
dc.subjectORE
dc.subjectREDUCTION
dc.subjectOXIDE
dc.subjectWATER
dc.titleSynthesis of nanosized Cr2O3 from turkish chromite concentrates with sodium borohydride (NaHB4) as reducing agent
dc.typearticle
dspace.entity.typePublication
local.avesis.ide495deca-6689-4922-afb9-eb60b3a198b1
local.import.packageSS17
local.indexed.atWOS
local.indexed.atSCOPUS
local.journal.numberofpages9
local.journal.quartileQ2
oaire.citation.endPage15
oaire.citation.startPage7
oaire.citation.titleINTERNATIONAL JOURNAL OF MINERAL PROCESSING
oaire.citation.volume157
relation.isAuthorOfPublication46159ed0-7c30-4490-a7db-8149b83bce7c
relation.isAuthorOfPublication.latestForDiscovery46159ed0-7c30-4490-a7db-8149b83bce7c

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