Zinc Borate Synthesis Using Hydrozincite and Boric Acid with Ultrasonic Method

Zinc borate is an important inorganic hydrate borate material, which can be used as a flame retardant agent and corrosion resistance material. This compound can loss its structural water content at higher than 290°C. Due to thermal stability; Zinc Borate can be used as flame retardant at high temperature process of plastic and gum. In this study, the ultrasonic reaction of zinc borates were studied using hydrozincite (Zn5(CO3)2·(OH)6) and boric acid (H3BO3) raw materials. Before the synthesis raw materials were characterized by X-Ray Diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FT-IR). Ultrasonic method is a new application on the zinc borate synthesis. The synthesis parameters were set to 90°C reaction temperature and 55 minutes of reaction time, with 1:1, 1:2, 1:3, 1:4 and 1:5 molar ratio of starting materials (Zn5(CO3)2·(OH)6 : H3BO3). After the zinc borate synthesis, the products were analyzed by XRD and FT-IR. As a result, optimum molar ratio of 1:5 is determined for the synthesis of zinc borates with ultrasonic method.




References:
[1] M. Gonen, D. Balkose, R. B. Gupta,and S. Ulku, “Supercritical
carbondioxide drying of methanol zincborate mixtures”, Ind. Eng. Chem.
Res.,vol. 48, pp. 6869–6876, 2009.
[2] C. Ting, D. Jian-Cheng, W. Long-Shuo, and F. Gang, “Preparation and
characterization of nano-zinc borate by a new method”, J. Mater.
Process. Tech., vol. 209, pp. 4076–4079, 2009.
[3] Y. Cui, X. Liu, Y. Tuan, N. Ding and Z. Wing, “Controllable synthesis
of three kinds of zinc borates and flame retardant properties in
polyurethane foam”, Colloids and Surfaces A: Physicochem. Eng.
Aspects, 414 (2012) 274– 280.
[4] D. Gürhan, G. Ö. Çakal, İ. Eroğlu, and S. Özkar, Kesikli reaktörde çinko
borat üretimini etkileyen parametrelerin incelenmesi, 1. National Boron
Workshop Symposium Book, April 28-29, Ankara, 2005.
[5] D. Schubert, F. Alam, M. Visi and C. Knobler, “Structural
characterization and chemistry of the industrially important zinc borate
Zn(B3O4(OH)3)”, Chem. Mater.,vol. 15, pp. 866-871, 2002.
[6] H. E. Eltepe, D. Balköse, and S. Ülkü,“Effect of temperature and time
on zinc borate species formed from zinc oxide and boric acid in aqueous
medium”, Ind. Eng. Chem. Res., vol. 46, pp. 2367-2371, 2007.
[7] A. V. Shete, S. B. Sawant, and V. G. Pangarkar, “Kinetics of fluid–solid
reaction with an insoluble product: zinc borate by the reaction of boric
acid and zinc oxide”, J. Chem. Technol.Biot., vol. 79, pp. 526–532,
2004.
[8] N. Tugrul, A.S. Kipcak, N. Baran Acarali, E. Moroydor Derun, S.
Piskin, “Combined Hydrothermal Synthesis of Zinc and Magnesium
Borates at 100°C Using ZnO, MgO and H3BO3”, International Journal
of Chemical, Materials Science and Engineering, vol:7 No:9, pp. 247-
251, 2013.