Two-Stage Separation of V(IV) and Al(III) by Crystallization and Solvent Extraction from Aluminum-Rich Sulfuric Acid Leaching Solution of Stone Coal

lmenite (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.

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Experimental Study on Sulfuric Acid Leaching Behavior of Chromite with Different Temperature

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.361-363.628 ◽

2011 ◽

Vol 361-363 ◽

pp. 628-631 ◽

Cited By ~ 4

Author(s):

Cheng Jun Liu ◽

Jie Qi ◽

Mao Fa Jiang

Keyword(s):

Sulfuric Acid ◽

Acid Leaching ◽

Raw Material ◽

Leaching Rate ◽

Sulfuric Acid Leaching ◽

Leaching Process ◽

Pollution Problem ◽

Environmental Pollution Problem ◽

Leaching Solution ◽

Leaching Residue

Utilizing Pakistan chromite as raw material, the rapid leaching of chromium and iron could be realized by the sulfuric acid leaching process on the condition of atmospheric pressure and the addition of oxidant A. And the leaching rate of chromium and iron would be 98.5% and 71.9%, respectively. The sulfuric acid leaching processes with different temperature were systematically studied by chemical analysis and phase analysis. The results showed that, with the increase of reaction temperature, the leaching rate of chromium would increase gradually, but the leaching rate of iron increased at first and then decreases and reached its maximum at 140°C. When the temperature > 160°C, the phases of the leaching residue were magnesium iron silicate and a few of silica, no chromohercynite, chrompicotite and magnesioferrite existed in the chromite. The leaching solution of sulfuric acid leaching process could be used for preparing the basic chrome sulfate, and there is no Cr6+ in the leaching residue and solution. The results would provide theoretical guidance for solving environmental pollution problem of Cr6+ in traditional chromate production process.

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Dissolution Behavior of La2O3, Pr2O3, Nd2O3, CaO and Al2O3 in Sulfuric Acid Solutions and Study of Cerium Recovery from Rare Earth Polishing Powder Waste via Two-Stage Sulfuric Acid Leaching

MATERIALS TRANSACTIONS ◽

10.2320/matertrans.m-m2013802 ◽

2013 ◽

Vol 54 (5) ◽

pp. 713-719 ◽

Cited By ~ 32

Author(s):

Namil Um ◽

Tetsuji Hirato

Keyword(s):

Rare Earth ◽

Sulfuric Acid ◽

Acid Leaching ◽

Dissolution Behavior ◽

Acid Solutions ◽

Sulfuric Acid Leaching ◽

Two Stage ◽

Sulfuric Acid Solutions

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Investigation into the kinetic regularities of impurity transfer during the sulfuric acid leaching of the zinc-containing intermediate product of two-stage Waelz process of zinc cakes: Part I. leaching kinetics of individual model oxides

Russian Journal of Non-Ferrous Metals ◽

10.3103/s1067821215040161 ◽

2015 ◽

Vol 56 (4) ◽

pp. 372-376

Author(s):

A. M. Pan’shin ◽

O. S. Anisimova ◽

S. V. Mamyachenkov ◽

D. A. Rogozhnikov

Keyword(s):

Sulfuric Acid ◽

Intermediate Product ◽

Acid Leaching ◽

Leaching Kinetics ◽

Sulfuric Acid Leaching ◽

Two Stage ◽

Individual Model ◽

Impurity Transfer ◽

Waelz Process ◽

Kinetics Of

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Enriching Indium Using Neutralization from Solution Bearing Indium

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.287-290.2952 ◽

2011 ◽

Vol 287-290 ◽

pp. 2952-2956

Author(s):

Yong Gang Li ◽

Da Jin Yang ◽

Jian Rong Peng ◽

Xiao Ying Li

Keyword(s):

Sulfuric Acid ◽

Optimal Condition ◽

Zinc Sulfide ◽

Recovery Rate ◽

Acid Leaching ◽

Sulfide Mineral ◽

Optimal Dosage ◽

Sulfuric Acid Leaching ◽

Leaching Solution ◽

Sulfide Concentrate

An experimentation project has been put forward to enrich indium from sulfuric acid leaching solution bearing high content of indium: preneutralization using calcine---reduction using zinc sulfide concentrate---neutralization using limestone for precipitating indium, and ascertained optimal dosage of reagent in every procedure through experiment under certain condition: the dosage of calcine is 1.3 times of theoretic value, the dosage of zinc sulfide mineral concentrate is 2.2～2.3 times of theoretic value, the dosage of limestone is double of theoretic value. On this optimal condition, the straight recovery rate of indium is more than 97%, and the content of indium sediment from precipitating is more than 0.1%.

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