Under normal atmospheric pressure, liquid nitrogen will form if it is below this temperature. If pressurized, liquid nitrogen can be obtained at higher temperatures.
In industry, liquid nitrogen is obtained by fractional distillation of air. After the air is purified, it is liquefied in a pressurized and cooled environment and separated by the different boiling points of the components in the aiBecause the temperature difference between the product and the surrounding environment is very large even in winter. it is important to keep liquid nitrogen isolated from the surrounding environment.
Although commonly used as a gas, nitrogen is generally stored and transported in a liquid state, which results in lower product supply costs.
When nitrogen turns into a liquid, it becomes a cryogenic liquid. Cryogenic liquids are liquefied gases that generally have a boiling point below –238 ° F (–150 ° C). The boiling point of liquid nitrogen is –320.5 ° F (–195.8 ° C). Because the temperature difference between the product and the surrounding environment is very large even in winter. It is important to keep liquid nitrogen isolated from the surrounding environment. Products also require specialized use and storage equipment.