Manufacture of bleaching powder

Bleaching Powder chemical composition: Ca(ClO)2CaCl2Ca(OH)2.2H2O


Calcium hypochlorite – Ca(OCl)2
Ca(OCl)2 is a white, corrosive solid that comes either in tablet form or as a granular powder in the market. It easily emits chlorine gas easily when it contacts with water or moisture.

Raw Materials of bleaching powder manufacturing process

• Limestone (CaCO₃) – to obtain calcium oxide
• Chlorine gas (Cl₂)
• Bleaching powder manufacturing process
• Steps, reactions, materials of bleaching powder and physical conditionsin manufacturing process is explained below.
  
  
  Heating limestone
  First, slaked lime (CaO) is produced by heating limestine. As a by product carbon dioxide is given.
  
  calcium-carbonate-decomposition
  
  Calcium oxide and water reaction
• Calcium oxide is mixed with water to take calcium hydroxide ( Ca(OH)2 ). Ca(OH)2 is precipitated in concentrated solutions.
• CaO + H2O slaked lime
  Calcium hydroxide and chlorine gas rection
  Finally, Calcium hydroxide ( Ca(OH)(s) ) is reacted with chlorine ( Cl2 ) gas. This reaction gives the bleaching powder.
• slaked lime and chlorine gas reaction