Catalytic production of antimonate through alkaline leaching of stibnite concentrate

GÖK Ö.

HYDROMETALLURGY, cilt.149, ss.23-30, 2014 (SCI-Expanded, Scopus) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 149
  • Basım Tarihi: 2014
  • Doi Numarası: 10.1016/j.hydromet.2014.06.007
  • Dergi Adı: HYDROMETALLURGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.23-30
  • Anahtar Kelimeler: Alkaline leaching, Antimony oxidation, Hydroquinone, Sodium hydroxyantimonate, Stibnite
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

A hydrometallurgical treatment based on leaching and oxidation of trivalent antimony in hydroquinonecatalyzed alkaline electrolyte and precipitation of sodium hydroxyantimonate was elucidated. The influences of temperature and hydroquinone concentration on both the leaching and oxidation processes were discussed. Similar trends for recovery curves of antimony were obtained at different temperatures and hydroquinone concentrations in oxygen-rich alkaline electrolyte. The antimony recovery was calculated to be 90% within 1 h at 80 degrees C in 0.4 g.L-1 HQ The complete trivalent to pentavalent antimony oxidation was achieved within 4 h under optimum conditions in a single-stage process. The oxidation rate equation is as follows: