Sulfuric acid leaching of Bangka Indonesia ilmenite ore and ilmenite decomposed by NAOH

Latifa Hanum Lalasari, Rudi Subagja, Akhmad Herman Yuwono, F. Firdiyono, Sri Harjanto., Bambang Suharno

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Citations (Scopus)


Ilmenite (FeO.TiO2) ore from Bangka island-Indonesia is a potential raw material for synthesizing titanium dioxide (TiO2), which can be used further as pigmen and photocatalyst. The fabrication of TiO2 particles from ilmenite can be carried out through the solvent extraction using sulfuric acid route. Therefore, the solubility of the ilmenite ore in sulfuric acid environment is one of the key factors to obtain the desired TiO2 particles. The current research is aimed at comparing the solubility of pristine Bangka ilmenite ore with that of precedingly decomposed by sodium hidroxide (NaOH) in pressurized and atmospheric reflux reactors. The dissolution of both precursors was carried out in those reactors under various temperatures of 75, 100, 125, 150 and 175°C. The results showed that the optimum dilution was achieved at 150°C. The obtained recovery of ilmenite was 88.8% for the pressurized reactor and 75.5% for the atmospheric reflux reactor. The solubility of titanium (Ti) element increased steadily to reach a recovery of 68% at 150°C and decreased significantly afterwards. It was also found that the increase of iron (Fe) element solubility was proportional to the increase of processing temperatures.

Original languageEnglish
Title of host publicationAdvances in Materials, Processing and Manufacturing
Number of pages9
Publication statusPublished - 2013
Event13th International Conference on Quality in Research, QiR 2013 - Yogyakarta, Indonesia
Duration: 25 Jun 201328 Jun 2013

Publication series

NameAdvanced Materials Research
ISSN (Print)1022-6680


Conference13th International Conference on Quality in Research, QiR 2013


  • Ilmenite
  • Ionic iron
  • Ionic titanium
  • Sodium hydroxide
  • Sulfuric acid


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