Then evaporate and cool the liquid to room temperate and get the crystallization, the after recrystallizing, get the Dichromate-potassium with its purity exceed 96% by analysis.

• 用稀硫酸调节到PH=2,蒸发水并冷却到室温结晶,再经重结晶提纯得到产品重铬酸钾,经分析,产品纯度达96%25以上。