Alum is a commonly a hydrated double sulfate salt of aluminum with the general formula XAl(SO4)2·12H2O, wherein X is a monovalent cation that includes Ammonium or Potassium. It is used in water purification, medicines, cosmetics, food preparation, and flame-retardant paper and textiles. The goal of the present work is to produce potassium aluminum sulfate (PAS) from local kaolin. Alum is produced ...