Üleksitin H2SO4 Çözeltisinde Çözünmesi Üzerine Ultrasesin Etkisi

Year 2018, Volume: 30 Issue: 2, 27 - 32, 19.09.2018

Melike Sınırkaya

Abstract

Üleksit, borik asit üretiminde kullanılan
en önemli minerallerden biridir. Borik asit, heterojen katı-sıvı
reaksiyonlarında yan ürün olan jipsin kristallenmesine sebep olan, sülfürik
asitin üleksitle reaksiyonundan elde edilir. Bu çalışmada H₂SO₄
çözeltilerinde, ultrasesin üleksitin çözünmesi üzerine etkisi incelendi.
Reaksiyon süresi ve sıcaklık parametere olarak seçildi. Ultrasesli ortamda,
reasiyon sıcaklığı arttıkca B₂O₃’in çözünme oranı azaldı.
Yine ultrasesli ortamda, reaksiyon ilerledikçe, CaO’in  dönüşüm oranı 30˚C ve 50˚C’ de arttı. Ancak
bu oran 70˚C’ de azaldı. Oysa, ultrasessiz ortamda B₂O₃
ve CaO’in çözünme fraksiyonları sıcaklık arttıkca arttı.

Keywords

Ultrases, Üleksit, Çözünme, Kavitasyon

References

• 1. Gezer, B., Sert, H., Okyay, T.O., Bozkurt, S., Başkaya, G., Şahin, B., Ulutürk, C. and Sen, F. (2017). Reduced graphene oxide (rGO) as highly effective material for the ultrasound assisted boric acid extraction from ulexite ore. Chemical Engineering Research and Design, 117: 542-548. 2. Imamutdinova, V.M. (1967). Kinetics of dissolution of borates in mineral acid solutions. Zh. Prikl. Khim, 40: 2593–2596. 3. Hagenson, L.C., Naik, S.D and L.K. and Doraiswamy, L.K. (1994). Rate enhancements in a solid-liquid reaction using PTC, microphase, ultrasound and combinations thereof. Chem. Eng. Sci., 49:4787–4800. 4. Okur, H., Tekin, T., Ozer, A.K. and Bayramoglu, M. (2002). Effect of ultrasound on the dissolution of colemanite in H2SO4. Hydrometallurgy, 67: 79– 86. 5. Betchtloff, B., Justen, P.J. and Ulrich, J. (2001). The Kinetics of Heterogeneous Solid-Liquid Reaction Crystallizations—An Overview and Examples. Chem. Ing. Tech, 73: 453–460. 6. Lyczko, N., Hassoun, M., Espitalier,F., Louisnard, O. and David,R. (2002). Crystallization of Potassium Sulphate Assisted by Ultrasound .Chem. Eng. Trans., 1: 209–214. 7. Teipel, U., Mikonsaari, I. and Ulrich, J. (2002). Ultrasonic Crystallization of Potassium Alum. Chem. Eng. Trans., 1: 239–243. 8. Hagenson, L.H.and Doraiswamy, L.K. (2000).The rate enhancing effect of ultrasound by inducing supersaturation in a solid–liquid system. Chem. Eng. Sci., 55: 3085–3090. 9. Cains, P.W., Martin, P.D. and Price, C.J. (1998). The Use of Ultrasound in Industrial Chemical Synthesis and Crystallization 1. Applications to Synthetic Chemistry, Organic Process Research and Development, 2(1): 34-48. 10. Luque de Castro,M.D and Priego-Capote, F. (2007). Ultrasound-assisted crystallization (sonocrystallization). Ultrasonics Sonochemistry, 14: 717–724. 11. Hickling, R. (1965). Nucleation of freezing by cavity collapse and its relation to cavitation damage. Nature, 206: 915–917. 12. Hunt, J.D and Jackson, K.A. (1996). Nucleation of solid in an undercooled liquid by cavitation. J. Appl. Phys., 37: 254–257. 13. Hickling, R. (1994). Transient, high pressure solidification associated with cavitation in water. Phys. Rev. Lett., 73: 2853–2856. 14. Hunt, J.D and Jackson, K.A. (1966). Nucleation of the solid phase by cavitation in an undercooled liquid which expands on freezing. Nature, 211:1080–1081. 15. Gülensoy, H. (1984). Kompleksometrinin Esasları ve Kompleksometrik Titrasyonlar, İstanbul Üniversitesi Yayınları, İstanbul, Türkiye. 144-146. 16. Furman, N.H. (1963). "Standart Methods of Chemical Analysis". D. Van. Nostrand Company, 6th ed, New Jersey, A.B.D, 798-865. 17. Singh, M. and Garg, M. (1999).Cementitious binder from fly ash and order industrial wastes. Cem. Concr. Res., 29: 309– 314. 18. Tosunoglu, V., Demirbag, R., Boncukcuoglu, R., Anapalı, Ö. and Öztepe, C. (2002). Pozzolanic properties of natural pasa. Energy Educ. Sci. Technol., 8 (2): 77– 84. 19. Ozkul, H.M. (2000). Utilization of citrı- and desulphogypsum as set retarders in Portland cement. Cem. Concr. Res., 30: 1755– 1758.