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以硫酸亚铁铵、草酸为主要原料,双氧水为氧化剂合成三草酸合铁(Ⅲ)酸钾。采用响应面法优化三草酸合铁(Ⅲ)酸钾的制备工艺,用XRD、FT-IR、SEM对产物进行表征。结果表明,产物化学式为K[Fe(C_2O_4)_3]·3H_2O,形貌为微米块状颗粒。优化工艺条件:草酸亚铁制备中草酸用量为28.00 m L、反应时间为18.00 min;氧化配位反应中草酸钾用量为17.00 m L、H_2O_2用量为6.00 m L,清除H_2O_2时间为5.00 min;酸溶配位中草酸用量为11.00 m L,在该条件下重复实验,产品均为翠绿色晶体,产率均在89.89%~90.57%之间。
Ammonium ferrous sulfate, oxalic acid as main raw materials, hydrogen peroxide as oxidant synthesis of trioxalate iron (Ⅲ) potassium. The preparation of potassium oxalate trioxalate was optimized by response surface methodology. The product was characterized by XRD, FT-IR and SEM. The results show that the chemical formula of the product is K [Fe (C 2 O 4) 3] 3H 2 O, and the morphology is micrometer-sized particles. The optimum conditions were as follows: the amount of oxalic acid was 28.00 mL, the reaction time was 18.00 min, the amount of potassium oxalate was 17.00 mL, the amount of H_2O_2 was 6.00 mL, the time of H_2O_2 removal was 5.00 min, The dosage of oxalic acid in solution was 11.00 m L, and the experiment was repeated under these conditions. All the products were emerald green crystals with the yields between 89.89% and 90.57%.