Investigating dissolution of colemanite in sulfuric acid solutions by particle size measurements

Sis, H.; Bentli, İsmail; Demirkıran, Nizamettin; Ekmekyapar, Ahmet

doi:10.1080/01496395.2018.1532961

Cited by 7 publications

(2 citation statements)

References 17 publications

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“…In a two-stage dissolution process; the dissolution rate was defined from with diffusioncontrolled model from ash film with activation energies of 3.4 kJ.mol -1 and 6.1 kJ.mol -1 , respectively [14]. Sis et al investigated the dissolution of colemanite in an aqueous medium in the presence of hydrochloric acid and it was determined that the reaction rate conformed to the Avrami model [19].…”

Section: Methodsmentioning

confidence: 99%

Dissolution behavior and kinetic investigation of 〖Ca〗^(2+) in the dissolution of colemanite in propionic acid presence saturated with synthetic flue gas

Uğur

2024

Journal of Boron

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Colemanite (〖2CaO.3B〗_2 O_3.5H_2 O) is a calcium borate mineral and can be expressed as the primary material of industrial production of boric acid. Boric acid is one of the most essential raw materials obtained by solving colemanite ore in acidic solutions and gases. The dissolution behavior and kinetics of 〖Ca〗^(2+) in a solution of colemanite in a propionic acid solution saturated with synthetic flue gas were examined. In this context; the effects of particle size, reaction temperature, acid concentration, solid-liquid ratio and synthetic flue gas flow rate parameters were investigated. According to the experimental data, it was observed that the amount of 〖Ca〗^(2+) passing to the solution increased with the increase of the reaction temperature, acid concentration and gas flow rate, and with the decrease in solid-liquid ratio and grain size. Experimental results were analyzed by homogeneous and heterogeneous models using the Statistica package program, and it was determined that the dissolution of 〖Ca〗^(2+) in solution complies with the “Avrami” model. The activation energy (E) was found as 〖26.83 kJ.mol〗^(-1) and the Arrhenius constant (A) was found as 〖8.9*10〗^3.

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Section: Methodsmentioning

confidence: 99%

Dissolution behavior and kinetic investigation of 〖Ca〗^(2+) in the dissolution of colemanite in propionic acid presence saturated with synthetic flue gas

Uğur

2024

Journal of Boron

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“…Dolayısıyla, tanelerin yüzey alanı artmakta ve çözünme hızı da buna bağlı olarak artmaktadır.Ayrıca, yüzey alanının artmasıyla katı tanecik ile akışkan reaktan arasında temas yüzeyi artışına bağlı olarak çözünme hızının yükselmesi de beklediğimiz olası sonuçlardan birisidir. Kolemanitin potasyum dihidrojen fosfat ve sülfürik asit çözeltileriyle yapılan çalışmalarında da benzer sonuçlar görülmüştür[25,26].Karıştırma hızının kolemanitin çözünme üzerinde ki etkisini incelemek için 50, 200, 350, 500 devir.dakika -1 hız değerleri kullanılmıştır. Deney sonuçları, Şekil 5'de grafik edilmiştir.…”

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Investigation of Kinetic Mechanism of Colemanite in Sodiumbisulfate Solution

Şimşek¹,

Yeşilyurt²

2021

Journal of Boron

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Bu çalışmada kolemanitin sodyum bisülfat çözeltisi içerisindeki çözünme kinetiğine; katı/sıvı oranı, sodyum bisülfat (NaHSO 4 ) konsantrasyonu, tane boyutu, karıştırma hızı ve reaksiyon sıcaklığı parametrelerinin etkisi incelenmiştir. Deneysel sonuçlara göre, kolemanitin çözünürlüğünün sıcaklığın ve konsantrasyonun artması ile arttığı, tane boyutunun ve katı/sıvı oranının artması ile azaldığı tespit edilmiştir. Karıştırma hızının çözünme kinetiği üzerine etkisi, 350 devir.dakika -1 değerine kadar olumlu, yaklaşık 350 devir.dakika -1 'den sonraki değerlerde ise olumsuz olduğu bulunmuştur. Deneysel veriler sabit boyutlu parçacıklar için reaksiyona girmemiş çekirdek modeline göre analiz edilmiştir. Çözünmenin kül filminden iki aşamalı difüzyon kontrollü olduğu bulunmuştur. Aktivasyon enerjileri bir ve ikinci aşamalarda sırasıyla 3,4 ve 6,1 kJ.mol -1 olarak bulunmuştur.

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А kinеtiс аnаlysis fоr prоduсtiоn of саlсium bоrоgluсоnаtе frоm colemanite

Demir

Al‐Ani

Laçin

2020

Int J of Chemical Kinetics

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In this paper, the kinetic model of colemanite dissolution in gluconic acid solutions was carried out in a batch reactor. The effects of the particle size, reaction temperature, stirring speed, gluconic acid concentration, and solid/liquid ratio on colemanite dissolution were experimentally studied. The empirical parameters were the gluconic acid concentration (0.05-0.2 M), the temperature (20-50 • C), the solid/liquid ratio (0.05/500-1.5/500 g⋅L −1), particle size (193.5-1000 μm), and stirring speed (400-700 rpm). The kinetic models for heterogeneous solid-liquid reactions were used with the dissolution data in evaluating the kinetic. The dissolution of colemanite in gluconic acid solutions was controlled by diffusion through the product layer. The activation energy was found to be 8.39 kJ⋅mol −1. The rate expression associated with the dissolution rate of colemanite depending on the parameters chosen may be summarized as follows: 1 − 3(1 −) 2∕3 + 2(1 −) = 1.2 −8.39∕ .

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Investigating dissolution of colemanite in sulfuric acid solutions by particle size measurements

Cited by 7 publications

References 17 publications

Dissolution behavior and kinetic investigation of 〖Ca〗^(2+) in the dissolution of colemanite in propionic acid presence saturated with synthetic flue gas

Dissolution behavior and kinetic investigation of 〖Ca〗^(2+) in the dissolution of colemanite in propionic acid presence saturated with synthetic flue gas

Investigation of Kinetic Mechanism of Colemanite in Sodiumbisulfate Solution

А kinеtiс аnаlysis fоr prоduсtiоn of саlсium bоrоgluсоnаtе frоm colemanite

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