摘要
通过次氯酸盐氧化法可稳定合成纯度98%以上的高铁酸钾(K2FeO4)。稳定合成高纯度高铁酸钾与原材料选择、投料顺序、反应时间、温度等多种因素有关,试验研究结果表明其优化合成条件为:Fe(NO3)3·9H2O、过量NaClO溶液和自制复合稳定剂在饱和NaOH溶液中,20℃下反应1.5h;除盐后,滤液中加饱和KOH溶液,20℃下反应15min,即可析出粗产品高铁酸钾;经重结晶、有机物洗涤、干燥等后处理工序纯化后得到高纯度高铁酸钾。稳定合成K2FeO4的关键是自制复合稳定剂的加入,得到高纯度KFeO的关键是后处理纯化条件的控制。
A pure potassium ferrate(Ⅵ) can be prepared by hypochlorous salt oxidation stably. Raw materials ,reaction time and temperature would have an effect on production rate and purity of potassium ferrate(Ⅵ). Its optimization conditions for synthesis are: Fe(NO_3)_3·9H_2O, excess of NaClO solution and home-made composite stabilizer react with saturate NaOH solution at 20 ℃ in 1.5 h. After gotten rid of the salts , saturate KOH solution was added in filtrate at 20 ℃ in 15 min, potassium ferrate(Ⅵ) was separated out and purified by process of recrystallization, washing organic contaminants and drying . The results show that home-made composite stabilizer and the condition of purification are very important to synthesize pure potassium ferrate(Ⅵ) stably.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2005年第5期109-111,115,共4页
Journal of Chongqing University
关键词
高铁酸钾
合成
复合稳定剂
potassium ferrate(Ⅵ)
synthesis
home-made composite stabilizer
