Kolemanitin propiyonik asit çözeltilerinde çözünmesi sırasında Ca²⁺ iyonunun kinetik davranışı

Year 2025, Volume: 15 Issue: 2, 634 - 649, 01.06.2025

Mücahit Uğur , Ahmet Yartaşı , Mehmet Muhtar Kocakerim

https://doi.org/10.21597/jist.1522708

Abstract

Türkiye’de bulunan ticari bor rezervlerinin öncülüğünü kolemanit, tinkal ve üleksit oluşturmaktadır. Bir kalsiyum borat minerali olan kolemanit cevheri, bor trioksit (B2O3) bakımından en zengin bileşime sahiptir. İçerdiği yüksek B2O3 içeriğiyle başta borik asit ve endüstride bor bileşiklerinin üretiminde temel hammaddedir. Günümüz endüstrisinde bor ve bor türevlerinin kullanımı artmaktadır. Kullanılacak olan bor minerallerinin saf olarak elde edilmesi büyük önem arz etmektedir. Kolemanitin propiyonik asitte çözünmesi safsızlıkların oluşumunu engellemekte ve ticari öneme sahip bir yan ürün oluşmaktadır. Bu çalışmada kolemanitin propiyonik asit çözeltilerindeki çözünme kinetiği üzerine yapılan bu çalışma, reaksiyon sıcaklığı, asit konsantrasyonu, katı-sıvı oranı ve tane boyutu gibi parametrelerin çözünme hızını önemli ölçüde etkilediğini ve bu parametrelerin optimizasyonu ile çözünme verimliliğinin artırılabileceğini göstermektedir. Bu bulgular literatürdeki diğer çalışmalarla uyumludur ve kolemanitin farklı asit çözeltilerinde çözünme kinetiği üzerine yapılan araştırmalara önemli katkılar sağlamaktadır. Sonuç olarak, kolemanitin farklı asit çözeltilerinde çözünme kinetiği üzerine yapılan bu çalışmaların çoğunda karıştırma hızının etkisinin olmadığı gözlemlenmiştir. Çözünme hızının tipik olarak artan sıcaklıklarla, azalan tanecik boyutuyla ve azalan katı-sıvı oranıyla arttığı tespit edilmiştir. Çözünme sürecinin çoğunlukla difüzyon kontrolüne bağlı olduğu ve aktivasyon enerjisinin hesaplandığı bu sonuçlar, propiyonik asit çözeltilerinde elde edilen bulgularla tutarlıdır. Aktivasyon enerjisi (E) 36,56 kj.mol-1 olarak bulundu.

Keywords

Bor, Kolemanite, Propiyonik asit, Çözünme kinetiği, Aktivasyon enerjisi

Supporting Institution

Çankırı Karatekin Üniversitesi

Project Number

MF210621D06

Kinetic Behavior of Ca²⁺ Ions During the Dissolution of Colemanite in Propionic Acid Solutions

Abstract

The leading commercial boron reserves in Türkiye are colemanite, tincal, and ulexite. The Colemanite ore, a calcium borate mineral, has the richest composition in terms of boron trioxide (B2O3). Boric acid, with its high B2O3 content, is the basic raw material in the production of boron compounds in industry. The use of boron and boron derivatives is increasing in today's industry. The boron minerals to be used must be obtained in pure form. Dissolving colemanite in propionic acid prevents the formation of impurities and produces a commercially important by-product This study, conducted on the dissolution kinetics of colemanite in propionic acid solutions, shows that parameters reaction temperature, acid concentration, solid-liquid ratio, and particle size significantly affect the dissolution rate and that the dissolution efficiency can be increased by optimizing these parameters. These findings are compatible with other studies in the literature and provide important contributions to research on the dissolution kinetics of colemanite in different acid solutions. As a result, it has been observed that stirring speed has no effect in most of these studies on dissolution kinetics of colemanite in different acid solutions. It has been established that the dissolution rate typically rises with elevated temperatures, diminished particle size, and reduced solid-liquid ratio. These results, in which the dissolution process mostly depends on diffusion control and the activation energy is calculated, are consistent with the findings obtained in propionic acid solutions. The activation energy (E) was found to be 36.56 kj/mol.

Keywords

Boron, Activation energy, colemanite, propionic acid, dissolution kinetics

Supporting Institution

Çankırı Karatekin Üniversitesi

Project Number

MF210621D06

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