OPTIMIZATION OF DISSOLUTION OF COLEMANITE ORE IN POTASSIUM DIHYDROGEN PHOSPHATE SOLUTION (KH2PO4)

Abstract

Boron is one of the most important richnesses of Turkey  which has approximately 72% of the known boron reserves globally. The production of boron compounds has essentially expanded recently due to increasing demands.  Colemanite rich in boron is a common raw material to produce boron components and the first step of this process is the dissolution of colemanite by using different leaching solutions. The main aim of the study is to investigate the optimization of dissolution of colemanite in potassium dihydrogen phosphate (KH₂PO₄) solution. Taguchi method was used to determine the optimum conditions while effectiveness of the parameters were identified by variance analysis. Reaction temperature (T), KH₂PO₄ concentration (C), stirring speed (W), solid to liquid ratio (S/L), and particle size (D) of colemanite were selected as parameters affecting the rate of colemanite dissolution. The optimum conditions for these parameters were determined. As a result of the experiment made under optimum conditions, both 98% of B₂O₃ passed into the solution and potassium borate by-product were produced by crystallization.

 

Keywords

• Colemanite,optimization,potassium dihydrogen phosphate,taguchi method

References

1. Tombal TD, Özkan ŞG, Ünver İK, Osmanlıoğlu AE. Bor bileşiklerinin özellikleri, üretimi, kullanımı ve nükleer reaktör teknolojisinde önemi/Properties, production, uses of boron compounds and their importance in nuclear reactor technology. Journal of Boron. 2016;1:8695.
2. Gönen M, Nyankson E, Gupta RB. Boric Acid Production from Colemanite Together with ex Situ CO2 Sequestration. Industrial & Engineering Chemistry Research. 2016;55:5116-24.
3. Davies T, Colak S, Hooper R. Boric acid production by the calcination and leaching of powdered colemanite. Powder Technology. 1991;65:433-40.
4. Ata ON, Colak S, Çopur M, Çelik C. Determination of the optimum conditions for boric acid extraction with carbon dioxide gas in aqueous media from colemanite containing arsenic. Industrial & engineering chemistry research. 2000;39:488-93.
5. Budak A, Gönen M. Extraction of boric acid from colemanite mineral by supercritical carbon dioxide. The Journal of Supercritical Fluids. 2014;92:183-9.
6. Kuskay B, Bulutcu A. Design parameters of boric acid production process from colemanite ore in the presence of propionic acid. Chemical Engineering and Processing: Process Intensification. 2011;50:377-83.
7. Yeşilyurt M. Determination of the optimum conditions for the boric acid extraction from colemanite ore in HNO 3 solutions. Chemical Engineering and Processing: Process Intensification. 2004;43:1189-94.
8. Durak H, Genel Y, Çalban T, Kuşlu S, Çolak S. Optimization of the Dissolution of Tincal Ore in Phosphoric Acid Solutions at High Temperatures. Chemical Engineering Communications. 2015;202:245-51.

9. Karagöz Ö, Çopur M, Kocakerim MM. Tinkalden Borik Asit Üretiminin Optimizasyonu. 10 Ulusal Kimya Mühendisliği Kongresi2012. p. 299-300.
10. Abalı Y, Bayca SU, Edgunlu G. Optimization of pure borax pentahdrate extraction from calcined tincal. Physicochemical Problems of Mineral Processing. 2015.
11. Tunc M, Celik C, Colak S, Kocakerim M. Determination of optimum conditions for dissolution of ulexite in sulphuric acid solutions. Transactions-Institution of mining and metallurgy Section C Mineral processing & extractive metallurgy. 1999;108.
12. Doğan TH, Yartaşı A. Optimization of Dissolution of Ulexite in Phosphate Acid Solutions. Journal of the Chemical Society of Pakistan. 2014;36.
13. Küçük Ö, Kocakerim MM. Optimization of dissolution of ulexite in water saturated with sulphur dioxide. Chemical Engineering and Processing: Process Intensification. 2005;44:1005-11.
14. Beşe AV, Borulu N, Çopur M, Çolak S, Ata ON. Optimization of dissolution of metals from Waelz sintering waste (WSW) by hydrochloric acid solutions. Chemical Engineering Journal. 2010;162:718-22.
15. Yeşilyurt M, Çolak S, Çalban T, Genel Y. Determination of the optimum conditions for the dissolution of colemanite in H3PO4 solutions. Industrial & engineering chemistry research. 2005;44:3761-5.
16. Tokkan D, Çalban T, Kuşlu S, Çolak S, Dönmez Bn. Optimization of microwave-assisted removal of lead from anode slime in triethanolamine solutions. Industrial & Engineering Chemistry Research. 2012;51:3903-9.
17. Çalban T, Kuşlu S, Çolak S. Precipitation conditions of Chevreul's salt from synthetic aqueous CuSO4 solutions. Chemical Engineering Communications. 2009;196:1018-29.
18. Yalvac Can M, Yildiz E. Phosphate removal from water by fly ash: Factorial experimental design. Journal of hazardous materials. 2006;135:165-70.
19. Çavuş Dişli F, Kuşlu S, Çalban T, Çolak S. Optimization of Dissolution of Ulexite Mineral at High Temperature in Aqueous and Borax Pentahydrate Solutions Saturated with Carbon Dioxide. Asian Journal of Chemistry. 2014;26.
20. Çalban T, Çolak S. Optimization of Pure Copper Powders Production from Leach Solutions Containing Copper. Asian Journal of Chemistry. 2014;26.
21. Çopur M. An Optimization Study of Dissolution of Zn and Cu in ZnS Concentrate with HNO~ 3 Solutions. Chemical and biochemical engineering quarterly. 2002;16:191-8.
22. Nian C, Yang W, Tarng Y. Optimization of turning operations with multiple performance characteristics. Journal of Materials Processing Technology. 1999;95:90-6.
23. Phadke MS. Quality engineering using robust design: Prentice Hall PTR; 1995.
24. Roy R. A primer on the Taguchi method, 1990. New York. 1990.
25. Nemodruk AA, Karalova ZK. Analytical chemistry of boron 5 B 10.811. 1965.