INDUSTRIAL PREPARATION OF HNO3
 
 
  On industrial scale HNO3 is prepared by the following three methods
1.Ostwald Method
2.Chilli-Sald Peter Method
3.Birkland-Eyde Method
OSTWALD METHOD
FOR MORE DETAILS CLICK HERE
Details of preparation
Raw Materials:
  1. Ammonia (NH3)
2. Oxygen(O2)
3. Water (H2O)
Catalyst: Platinum gauze
Steps of preparation
 
1. Primary Oxidation
 
Oxidation of NH3 gas is carried out in a special chamber containing platinum gauge One part of NH3 gas and eight part of oxygen gas by volume are passed through the chamber at 600C where Nitric oxide is formed
4NH3 + 5O2 4NO+6H2O + Heat
2. Secondary Oxidation:
 
Nitric oxide further oxidized into another chamber and it is converted into NO2
2NO+O2 2NO2
3. Absorption of NO2
 
NO2 is now introduced in absorption tower NO2 gas is passed through the tower and H2O is showered over it This converts NO2 into Nitric acid
3NO2+H2O 2HNO3+NO
Concentration
 
HNO3 attained its concentrated H2SO4 is used as dehydrating agent which absorbs extra H2O from HNO3
      For latest information , free computer courses and high impact notes visit : www.citycollegiate.com
|PHOTOSHOP|FLASH|SWISH|FLAX|INTERNET|PHYSICS|CHEMISTRY|HOME|