“高锰酸钾的制备”实验研究

大学本科无机制备课程中,"高锰酸钾的制备"实验采用固体碱熔法先制备锰酸钾,再用6.0 mol/L的HAc溶液歧化,经过滤、蒸发浓缩、结晶,得到产品.由于反应条件难掌握,学生实验成功率较低,产品纯度差,产率也低.基于此,对影响产品质量和产率的因素如碱熔条件、歧化反应pH值、蒸发浓缩方式、浓缩体积等进行了深入研究,在优化条件下制得的产品晶型好,产率高.

Experimental Study on Preparation of Potassium Permanganate

Undergraduate Inorganic Preparation course, the "preparation of potassium permanganate" experiment using solid alkali fusion method first to prepare potassium manganate, and then disproportionated with 6.0 mol/L HAc solution, filtered, evaporated, concentrated, crystallized to obtain products. The reaction conditions are difficult to grasp, the success rate of student experiments is low, the purity of the products is poor, and the yield is low. Based on this, influential factors such as alkali fusion conditions, pH value of disproportionation reaction, evaporation concentration method, and concentration volume were deeply studied. Under the optimized conditions, the obtained product has good crystal form and high yield.