Nitrogen is obtained from liquefied air through a process known as fractional distillation. Large amounts of nitrogen are combined with hydrogen to produce ammonia in a method known as the Haber process. Nitrogen gas is largely inert and is used as a protective shield in the semiconductor industry and during certain types of welding and soldering operations.
Oil companies use high pressure nitrogen to help force crude oil to the surface.
Liquid nitrogen is an inexpensive cryogenic liquid used for refrigeration, preservation of biological samples and for low temperature scientific experimentation. This page is maintained by Steve Gagnon .