Boric Acid → Boric acid (HBO2), zinc salt (2:1)

Beteiligte Stoffe

Reaktionsschritte

An aqueous solution was prepared by dissolving 72.5 g of boric acid (B2O3 content of 56.3%) in 1000 ml of pure water. To the aqueous solution were added 96.0 g of a zinc flower (ZnO content of 99.4%) and 217.5 g of boric acid (B2O3 content of 56.3%), and were stirred and mixed together such that the molar ratio of B2O3/ZnO was 2.0. Next, the solution was stirred and reacted at 60° C. for 90 minutes. The solution was further stirred and reacted at 90° C. for 4 hours. The obtained product was filtered, washed with water and was, then, dried at 105° C. to obtain a zinc borate (sample A-1). Table 3 shows the chemical composition and properties of the thus obtained zinc borate (sample A-1), FIG. 1 shows an X-ray diffraction image thereof, and FIGS. 2 and 3 show electron microphotographs thereof.

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