9. How is dinitrogen prepared on a commercial scale?

1.	9. How is dinitrogen prepared on a commercial scale?
Answer» Preparation of dinitrogen: Nitrogen is obtained commercially by liquefaction and fractionaldistillationof air. This process mainly involves two steps: Step 1: Air is reduced to liquid air by applying high pressure ranging between 100 to 200 atmospheres.This compressed air is then passed through fine jet where it undergoes expansion.This method is repeated several times which results in the formation of liquid air. Step 2: The liquid formed undergoes fractional distillation.The boiling point of dinitrogen is lower than that of the liquid oxygen and hence it distils out, leaving behind liquid oxygen. Nitrogen is obtained from the impure liquid.

Answer»

Preparation of dinitrogen:

Nitrogen is obtained commercially by liquefaction and fractionaldistillationof air. This process mainly involves two steps:

Step 1: Air is reduced to liquid air by applying high pressure ranging between 100 to 200 atmospheres.This compressed air is then passed through fine jet where it undergoes expansion.This method is repeated several times which results in the formation of liquid air.

Step 2: The liquid formed undergoes fractional distillation.The boiling point of dinitrogen is lower than that of the liquid oxygen and hence it distils out, leaving behind liquid oxygen. Nitrogen is obtained from the impure liquid.

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