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Open Chemistry

formerly Central European Journal of Chemistry

1 Issue per year


IMPACT FACTOR 2016 (Open Chemistry): 1.027
IMPACT FACTOR 2016 (Central European Journal of Chemistry): 1.460

CiteScore 2016: 0.61

SCImago Journal Rank (SJR) 2016: 0.288
Source Normalized Impact per Paper (SNIP) 2016: 0.735

Open Access
Online
ISSN
2391-5420
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Volume 13, Issue 1 (Nov 2014)

Issues

Alkali roasting of bomar ilmenite: rare earths recovery and physico-chemical changes

Sergio Sanchez-Segado
  • Corresponding author
  • Institute for Materials Research, Houldsworth Building, University of Leeds, Leeds LS2 9JT, UK
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Abhishek Lahiri
  • Institute of Electrochemistry, Clausthal University of Technology, 38678 Clausthal-Zellerfeld, Germany
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Animesh Jha
  • Institute for Materials Research, Houldsworth Building, University of Leeds, Leeds LS2 9JT, UK
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
Published Online: 2014-11-01 | DOI: https://doi.org/10.1515/chem-2015-0033

Abstract

In this work, the alkali roasting of ilmenite (FeTiO3) is presented as a process route for integrated beneficiation of the mineral for rutile-rich phase and rare earth oxides; the latter is released as a consequence of physical changes in the ilmenite matrix, during the water leaching after roasting. The oxidative alkali roasting transforms ilmenite mineral into water-insoluble alkali titanate and water-soluble ferrite. After roasting the insoluble alkali titanate is separated from rare-earth oxide mixture in colloidal form and water-soluble ferrite. Further leaching of alkali titanate is carried out with oxalic (0.3M) and ascorbic (0.01M) acid solution which removes the remaining Fe2+ ions into the leachate and allows precipitation of high-purity synthetic rutile containing more than 95% TiO2. Iron is removed as iron oxalate. The physico-chemical changes occurred during the roasting and leaching processes are reported by comparing the role of alkali on the roasting process and product morphologies formed.

Keywords : Titanium; Rare Earth oxides; Leaching; Selective separation; Synthetic Rutile

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About the article

Received: 2014-02-07

Accepted: 2014-04-06

Published Online: 2014-11-01


Citation Information: Open Chemistry, ISSN (Online) 2391-5420, DOI: https://doi.org/10.1515/chem-2015-0033.

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© 2015 Sergio Sanchez-Segado et al.. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

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