Method of separating and recovering aluminum, potassium, and ammonium from mixed solution containing aluminum sulfate, potassium sulfate, and ammonium sulfate

The invention provides a method of separating and recovering aluminum, potassium, and ammonium from a mixed solution containing aluminum sulfate, potassium sulfate, and ammonium sulfate. The method comprises following steps: evaporating and condensing the mixed solution, cooling the condensate to carry out crystallization to obtain mixed crystals of potassium alum and ammonium alum, burning the mixed crystals at a high temperature to prepare alumina, and recovering potassium sulfate and ammonium sulfate at the same time. The provided method can efficiently recover aluminum, potassium, and ammonium, and obtains high purity alumina, potassium sulfate, and ammonium sulfate, furthermore, the energy consumption is low, the investment is little, the production is carried out in an enclosed environment, no waste solid, waste gas or wastewater is discharged, the devices are easy to enlarge, and the industrial application prospect is good. 本发明提供了一种从含硫酸铝、硫酸钾和硫酸铵的混合溶液中分离回收铝、钾和铵的方法，所述方法包括：对混合溶液进行蒸发浓缩和冷却结晶得到钾明矾和铵明矾的混晶，所述混