Boric Acid Production From Sodium Metaborate With Sulfuric Acid

Öz

In this study, boric acid production with aqueous phase reaction of sodium metaborate with sulfuric acid is investigated. Sodium metaborate is the byproduct of catalytic hydrolysis of sodium borohydride reaction. It was reacted batchwise at 90^oC for 30 minutes with 98% H₂SO₄ solution. After the boric acid production, purification was investigated using ethanol, acetone and saturated boric acid solution. 97.78%, 93.13% and 100% pure boric acid products were obtained, respectively. These results, supported by XRD analysis, indicate that the proposed method was successful and it is possible to produce boric acid by reacting sodium metaborate directly with sulfuric acid.

Anahtar Kelimeler

• sodium metaborate; boric acid; sodium borohydride

Kaynakça

1. http://www.etimaden.gov.tr/borik-asit-113s.htm , 02.07.2015
2. Newman, A. 1932. Process of preparing boric Acid. ABD Patent (1,888,391).
3. Taylor, D. S. 1953. Production and seperation of anhydrous alkali metal sulfate and boric acid. ABD Patenti (2,637,626)
4. Taylor, D. S. 1956. Production of boric acid and anhydrous sodium sulfate, ABD Patenti (2,746,841).
5. Bedri, D. E. & Tolun, R. 1979. Boric Acid and Sodium Sulphate Produciton from Tincale ,Tubitak Report .
6. Boric Acid Production from Tincal, A. Mergen, H. Demirhan, M. Bilen, H. Cebi & M, Gündüz Eti Holding A.Ş., Directorate of Ress.&Dev. Department, Ankara, TURKEY, 2001.
7. http://www.boren.gov.tr/tr/projeler/proje-ciktilari/uretim-ve-uygulama-teknolojisi-gelistirilen-urunler, 14.07.2015
8. İ. Kayacan, Ö. M. Dogan, B. Z. Uysal, Int Jr of Hydrogen Energy, 2011, 36 (13), 7410-7415.

9. Gögce, Ö. Ö, U. G. Zafer, B. Z. Uysal, Proceedings of 4th Intn. Boron Symposium, 2009, Ed. A. Konuk et al., Eskişehir, 267-271.
10. Schlesinger, H. I., H. C. Brown, A. E. Finhold, Jr of American Chemical Society, 1953, 75, 205-209.
11. Product Data Sheet Sodium Metaborate 8 Mol, 20 Mule Team Borax.
12. Product Data Sheet Optibor Boric Acids, 20 Mule Team Borax.
13. Perry, R . Perry's Chemical Engineers' Handbook, 6th edition, McGraw-Hill Book Company,1984.