三草酸合铁(Ⅲ)酸钾的制备、组成测定和性质研究

摘要

以废铁屑、H<,2>SO<,4>、氨水为原料制备硫酸亚铁铵(悬浊液),与草酸反应,得草酸亚铁,再与草酸钾反应,得到三草酸合铁(Ⅲ)酸钾.以溶液的pH值为草酸加入量的依据,采用浓缩后挂棉线的方式析出晶体.通过化学分析、红外光谱对其结构组成进行确定.得到有关测定数据与理论值相吻合,证明此方法的可行性.在阳光直射下,三草酸合铁(Ⅲ)酸钾发生分解生成黄色物质,说明了其光敏性.%Using scrap iron and H2SO4 as raw materials, ammonium ferrous sulfate was prepared. Then the product reacted with oxalic acid and potassium oxalate to give potassium ferrioxalate. Solution pH value is based for the amount of oxalate. The crystal is obtained in the form of putting a cotton thread. Their structures were identified by chemistry analysis and IR spectra. It is proved that this method is correct. Under the direct sunlight, potassium ferrioxalate were decomposed to generate a yellow substance. The photosensitive property is certificated in the compound by the simple and feasible way.