Dissolution behaviour of a beryl ore for optimal industrial beryllium compound production

Baba, Alafara A.; Olaoluwa, Daud T.; Alabi, Abdul G. F.; Balogun, Ayo F.; Ibrahim, Abdullah S.; Sanni, Ruth O.; Bale, Rafiu B.

doi:10.1080/00084433.2017.1403107

Cited by 8 publications

(7 citation statements)

References 19 publications

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“…The residue after leaching was filtered, washed, dried and weighed and the fraction of the ore reacted was calculated from the initial difference in weight of amount dissolved and undissolved at various time intervals. Appropriate kinetic curve was examined using the established shrinking core models for the establishment of the dissolution mechanism while selected residues after appropriate treatments were fully characterized by SEM and XRF [16].…”

Section: Leaching Processmentioning

confidence: 99%

“…Purification studies of muscovite involves fluoric acid leaching which has been found to show great effects on processing of muscovite but also found to lead to severe environmental pollution [13,14]. Other purification studies such as the oxygen pressure acid leaching involves high acid consumption and an elongated leaching or reaction time which ends up leading to consequential declines in equipment life, production output as well as raise in production costs [15,16]. Therefore, this research sets out to determine the purification activities of muscovite ore in hydrochloric acid while critically examining the effects and extents acid concentrations, reaction temperature and particle size might have on the ore dissolution for better interpretation of the optimal purification process as well as its possible use as a pigment extender in paint production.…”

Section: Introductionmentioning

confidence: 99%

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Dissolution of a Nigerian sourced Muscovite ore for use as an ingredient in paint production

Olaoluwa

Abdulmalik

Muraina

et al. 2020

J. Nig. Soc. Phys. Sci.

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Dissolution and characterization studies on the purification of muscovite ore in hydrochloric acid for use in paint production was investigated. Specific dissolution parameters including the effects of acid concentration as well as temperature on the dissolution of muscovite ore were studied. Important instrumentation techniques such as X-ray Fluorescence (XRF), X-ray Diffraction (XRD) and Scanning Electron Microscopy (SEM) were employed for the better explanation of the dissolution process so as to fathom the availability of elements and compounds within the ore. The results revealed that the dissolution rates were considerably influenced as the acid concentration and temperature increased, while at optimal leaching conditions, about 85 % of the ore was found to have been reacted by 2.5 mol/L at 75oC temperature and at 120 minutes of leaching time. The reaction order for the dissolution can be deduced to be half order reaction as the value obtained was in the bracket of 0.50. The reaction kinetic data revealed the dissolution mechanism to involve diffusion and surface chemical mechanisms as the rate-controlling mechanisms while the different instrumentation techniques corroborated the dissolution as well as purification of the muscovite ore as an ingredient for possible use in paint production.

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Section: Leaching Processmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dissolution of a Nigerian sourced Muscovite ore for use as an ingredient in paint production

Olaoluwa

Abdulmalik

Muraina

et al. 2020

J. Nig. Soc. Phys. Sci.

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“…The content was then heated under moderate stirring, at a reaction temperature of 55°C at various reaction times of 5 to 120 minutes. At the end of each leaching test, the system was cooled and the slurry in the reactor was filtered, the resultant solid was washed, dried at 80°C for 60 minutes and weighed (Baba and Adekola, 2010;Baba et al, 2017). The fraction of ore reacted (α) at various times was calculated according to the expression:…”

Section: B Leaching Proceduresmentioning

confidence: 99%

“…The shrinking core model takes into account two different limiting conditions namely chemical reaction rate and the ash diffusion rate. The simplified equation of the chemical reaction and diffusion control shrinking core model is expressed respectively as follows (Levenspiel, 1972;Jin, Warren and Henein, 1984;Aydogan, Aras and Canbazoglu, 2005;Santos et al, 2010;Baba et al, 2017):…”

Section: Dissolution Kinetics Analysismentioning

confidence: 99%

Processing of a Nigerian columbite-rich ilmenite ore for improved industrial application by sulphuric acid solution

Baba

Jacob

Olaoluwa

et al. 2018

IMJ

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Due to increasing technological advancements, the demand for pure niobium products emanated from columbite ore processing has led to the wide array of its application in capacitors, nuclear uses, superconducting RF cavities, an electromagnetic radiation detector, medical devices, and aerospace among others. Therefore, this paper focuses on the kinetics of dissolution of a Nigerian Columbite mineral in sulphuric acid solution for improved industrial applications. The effects of acid concentration, reaction temperature and particle size on the ore dissolution rate were examined. Experimental results showed that the ore dissolution increases with increasing acid concentration and temperature and decreases with increasing particle size fraction. With 2 mol/L H2SO4 solution, 60.2% of the ore dissolved within 120 minutes using <90µm particle size at a temperature of 75 o C with moderate stirring (300 rpm). The unleached products were analyzed and found to contain siliceous compounds applicable as industrial by-products. The calculated activation energy (Ea) deduced to be 30.3 kJ/mol supported the proposed diffusion reaction mechanism for the first order dissolution process with a collision factor of 0.12 per minute. Hence, the dissolution data obtained in this study is an indication of thermodynamic feasibility for Nigeria Columbite ore fitness in improving science and technology for economic growth and development.

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“…The produced leach liquor contained mainly beryllium beside aluminum and other impurities. Zaki et al, 2005 andBaba et al, 2017 studied the treatment of the aforementioned solution through selective precipitation using ammonia solution and solvent extraction methods to obtain beryllium hydroxide and ammonium alum left behind in the solution. [1,15] The fluoride pathway however involved leaching of beryl containing geological samples with sodium silico fluoride or sodium ferric fluoride as shown in equations 2 and 3.…”

Section: Introductionmentioning

confidence: 99%

A Suggested Procedure for Chemical Processing of Beryl from Received Geological Sample, Eastern Desert, Egypt by Solvent Extraction Technique

Hady

Abdeldaym

2022

The Bulletin Tabbin Institute for Metallurgical Studies (TIMS)

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Processing of the beryl from received geological sample collected from Eastern Desert of Egypt has been studied via acidic fusion process using K 2 SO 4 under different factors. The recovery of beryllium from the prepared sulfate solution has been accomplished by solvent extraction namely; TOA. The optimum conditions for sulfate fusion for almost complete breakdown of beryllium guarantee 1/3 ore/salt ratio at 550°C for 3.5 h. The relevant conditions for the extraction and stripping of beryllium by trioctyl amine determined. The studied optimum extraction conditions involved 8 × 10 -3M TOA concentration, 1/1 O/A ratio at a pH of 0.8 and 15 min. Beryllium was stripped by 1.5M H 2 SO 4 solution in 1/1 O/A ratio for 20 min. From the corresponding McCabe-Thiele diagrams, it was noticed that 3 theoretical stages for each of the extraction and stripping separately were required. From the stripped solution, beryllium was precipitated as beryllium hydroxide at pH 9 using 10% NaOH solution. The produced beryllium hydroxide has then been properly dried at 150 °C for 1 hr and analyzed using AAS.

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Dissolution behaviour of a beryl ore for optimal industrial beryllium compound production

Cited by 8 publications

References 19 publications

Dissolution of a Nigerian sourced Muscovite ore for use as an ingredient in paint production

Dissolution of a Nigerian sourced Muscovite ore for use as an ingredient in paint production

Processing of a Nigerian columbite-rich ilmenite ore for improved industrial application by sulphuric acid solution

A Suggested Procedure for Chemical Processing of Beryl from Received Geological Sample, Eastern Desert, Egypt by Solvent Extraction Technique

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