The difference between alum and alum is that alum is crystallized from alumite by processing and refining, which generally refers to the same kind of goods, alum generally refers to potassium aluminum sulfate dodecahydrate, which is toxic, and has antibacterial properties, and can be used in medicine. Alum is also able to make aluminum salt, baking powder, paint, tanning, paper, waterproof materials, etc., but also used in food additives.

Preparation methods:

1, natural alum stone processing method will be alum stone crushing, roasting, dehydration, weathering, steam leaching, sedimentation, crystallization, crushing, aluminum potassium sulfate finished products.

2, bauxite method with sulfuric acid decomposition of bauxite ore to generate aluminum sulfate solution, and then add potassium sulfate reaction, filtration, crystallization, centrifugal dewatering, drying aluminum potassium sulfate products.

3, recrystallization method crude alum with water boiling, evaporation, crystallization, separation, drying aluminum potassium sulfate products.

4, aluminum hydroxide method aluminum hydroxide dissolved in sulfuric acid, and then add a measured amount of potassium sulfate solution heating reaction, filtration, concentration, crystallization, centrifugal separation, drying, aluminum potassium sulfate products.