Sulfuric Acid Leaching of Bangka Indonesia Ilmenite Ore and Ilmenite Decomposed by NaOH

Lalasari, Latifa Hanum; Subagja, Rudi; Yuwono, Akhmad Herman; Firdiyono, Florentinus; Harjanto, Sri; Suharno, Bambang

doi:10.4028/www.scientific.net/amr.0.522

Cited by 2 publications

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“…Ratio of oxalic acid to sulfuric acid (2:1), Acid concentration (30% w/w), dissolution time (4 h), ratio of liquid to solid (10), and temperature (160˚C) with standardized effect values of 15, 13.5, 12.5, 10, and 3.89, respectively. spectively, which are very close to the predicted values.…”

Section: Discussionmentioning

confidence: 99%

“…Today, the high-grade sources of titanium minerals such as rutile are diminishing; hence, for the low-grade ores like ilmenite an attempt is made to convert ilmenite into synthetic rutile [4]. Ilmenite can be upgraded to synthetic rutile using different methods of pyrometallurgy [4] [5] [6] [7], hydrometallurgy [8] [9] [10] [11], and electrometallurgy [12]. Despite some problems, utilizing the hydrothermal processes for ilmenite ore is more preferable.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the organic acids can be used as the iron removing agents. On the other hand, most of these studies were concerned with the extraction of titania from ilmenite by H 2 SO 4 and HCl [10] [11] [14] [16] [17], whereas few of the mare directed towards extracting titania by interaction with organic acid reagents. Martínez-Luévanos et al stated that oxalic acid can be selected as the leaching agent when in comparison to other organic acids such as citric, malonic and acetic acids.…”

Section: Introductionmentioning

confidence: 99%

“…Effect of temperature on (a) Fe dissolution (b) Ti dissolution. Effect dissolution time on (a) Fe dissolution (b) Ti dissolution.The final equations for the dissolution of Fe and Ti from ilmenite ore in terms of coded factors of the model are given by Equation(10) and Equation(11):Fe dissolution = 61.94 + 15.00A + 13.50B + 10.00C + 3.89D + 12.50E + 2.19AB + 0.69AC(10) Ti dissolution = 8.61 + 3.46A + 4.19B +2.26C + 1.96D + 2.28E − 0.19AB + 2.13AC(11) …”

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confidence: 99%

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Optimization of Ilmenite Dissolution by Synergistic Effect of Oxalic Acid and Hydrochloric Acid for Preparing Synthetic Rutile

Omidi¹,

Nuri²,

Tavakoli³

2018

IJNM

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This study was carried out to investigate the interaction of oxalic acid with hydrochloric acid to attain the better performance for iron dissolution in comparison to absence of oxalic acid. The effects of oxalic acid on ratio of hydrochloric acid, acid concentration, ratio of liquid to solid, temperature and dissolution time are investigated for the dissolution of Fe and Ti from ilmenite to produce synthetic rutile. The DX7 software basing on an experimental design method with the central composite of response surface design is applied to specify the effects of the parameters and to optimize the leaching process. The optimum condition was determined by analysis of variance (ANOVA), indicating that the ratio of oxalic acid to hydrochloric acid for Fe dissolution and acid concentration for Ti dissolution were the most effective parameters. The results showed that the dissolution of Fe and Ti in 30% (w/w) hydrochloric acid solution was only 48.65% and 5.14%, respectively, while at the same condition and in the presence of oxalic acid with twice the ratio, these values are increased to 78.65% and 12.06%, respectively. The optimum values of parameters were as follows: oxalic acid to hydrochloric acid ratio (2:1), acid concentration (30%), ratio of liquid to solid (10), temperature (160˚C), and dissolution time (3 h). By applying the optimized parameters, Fe and Ti dissolution of 97.15% and 2.8% were predicted by the software with a desirability of 0.745. The results of leaching tests indicated that the Fe and Ti dissolution of 97.58% and 2.43%, were achieved, respectively, which are very close to the predicted value.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Optimization of Ilmenite Dissolution by Synergistic Effect of Oxalic Acid and Hydrochloric Acid for Preparing Synthetic Rutile

Omidi¹,

Nuri²,

Tavakoli³

2018

IJNM

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“…In addition, the P25 Degussa precursor material used has several obstacles such as the import routes, limited stock, and high price For a country like Indonesia which has abundant mineral deposits, this motivates efforts to obtain an alternative TiO2 precursor from the local resource, namely FeTiO3 ilmenite mineral 17) . A hydrometallurgical extraction process has also been carried out using the sulfate pathway as a route to convert the ilmenite into TiO2 [18][19][20][21][22] . In previous studies 23) , the extraction process has converted the ilmenite into filtrate and slag/residue.…”

Section: Introductionmentioning

confidence: 99%

Titanium Dioxide Nanosheets derived from Indonesian Ilmenite Mineral through Post-Hydrothermal Process

Fauzi¹,

Lalasari²,

Sofyan³

et al. 2022

Evergreen

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Titanium dioxide (TiO2) nanosheets are potential candidate material to be developed for photocatalytic applications. The natural resources of TiO2 are abundant in the form of the mineral ilmenite (FeTiO3). In this work, TiO2 nanosheets have been synthesized using ilmenite mineral as the precursor through a post-hydrothermal process with temperature variations of 80,100, 120, and 150 o C for 24 hours. The resulting TiO2 nanosheets were characterized by x-ray diffraction (XRD), scanning electron microscope (SEM) and ultraviolet visible-diffuse reflectance spectroscopy (UV-DRS). XRD analysis showed that the majority phase of the nanosheets was anatase TiO2 accompanied by a small amount of sodium-titanate. The SEM study reveals the average thickness of nanosheets derived from post-hydrothermal process was 24.86 nm. XRD test results also showed that the increase in post-hydrothermal temperature from 80 to 150 o C has resulted in an increase in the crystallite size of anatase TiO2 from 35.14 to 45.59 nm. Such increase in the crystallite size has been found to lead to a decrease in the bandgap energy (Eg) of nanosheets from 2.85 to 2.70 eV. These results support the potential use of the resulting TiO2 nanosheets as the photocatalytic material under the visible light illumination

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Sulfuric Acid Leaching of Bangka Indonesia Ilmenite Ore and Ilmenite Decomposed by NaOH

Cited by 2 publications

References 0 publications

Optimization of Ilmenite Dissolution by Synergistic Effect of Oxalic Acid and Hydrochloric Acid for Preparing Synthetic Rutile

Optimization of Ilmenite Dissolution by Synergistic Effect of Oxalic Acid and Hydrochloric Acid for Preparing Synthetic Rutile

Titanium Dioxide Nanosheets derived from Indonesian Ilmenite Mineral through Post-Hydrothermal Process

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