Tests on removal of sulfate radical contained in beryllium hydroxide were conducted with several different methods, including washing, barium chloride precipitation and a combined method of hydrolysis by sodium hydroxide and precipitation. Results indicated that washing method had the worst effect, resulting in only 50% sulfate radical removed. And the method of barium chloride precipitation brought the content of sulfate radical in beryllium hydroxide remarkably reduced to less than 0.3%, which, however, was put at a disadvantage by its high cost and possibly accompanied pollution problem. By...
