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发明授权
CN101955230B 一种高铁酸钾的制备方法 有权 转让

一种高铁酸钾的制备方法
摘要：
本发明公开了一种高铁酸钾的制备方法，包括将NaOH和次氯酸钠(NaClO)溶液混合于反应釜中，滴加硝酸铁[Fe(NO3)3]溶液搅拌反应1-2h，调整反应浓度及PH值，使得高铁酸钠(Na2FeO4)从反应液中析出过滤，滤出的Na2FeO4加入KOH(氢氧化钾)溶液中，待Na2FeO4溶解后过滤，在溶液中缓慢滴加KOH饱和溶液，析出高铁酸钾(Na2FeO4)粗品。重结晶用异丙醇洗涤，在70℃80KPa条件下真空干燥，得纯品。本发明具有生产速度快，产品纯度高。(该法制得的高铁酸钾纯度可达94％以上。)母液能连续回用，能耗大大降低，环境污染少，成本低等优点。
摘要（英）：

The invention discloses a preparation method of potassium ferrate, which comprises: mixing solution of NaOH and solution of NaClO in a reaction kettle; dripping solution of [Fe(NO3)3], stirring and reacting for 1 to 2 hours; regulating the reaction concentration and pH value, precipitating the potassium ferrate (Na2Fe3O4) from the reacting solution and filtering; adding the Na2Fe3O4 filtered out into solution of potassium hydroxide (KOH); filtering after the Na2Fe3O4 dissolves; slowing dripping saturated solution of KOH into the solution to precipitate the coarse product of Na2Fe3O4; and recrystallizing, washing with isopropanol, and drying under vacuum under conditions of a temperature of 70 DEG C and a pressure of 80KPa to obtain a pure product. The preparation method has the advantagesof high production speed, high product purity (as high as over 94 percent), mother liquor recycling, great reduction in energy consumption, light environmental pollution, low cost and the like.

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