Introduction to the preparation method of nitrogen

There are various ways to prepare nitrogen. In the process of preparing nitrogen, we have made a lot of efforts to improve the purity of nitrogen. Resolutely not in order to reduce production costs, reduce production quality. So, what kind of preparation method do we generally adopt to ensure the purity of nitrogen and control the production cost within a reasonable range?
1. For the preparation of nitrogen, we need to pressurize the air to cool down first, and then gradually increase the temperature. N2\O2 is gasified into gas successively to achieve the purpose of separation.
2. Next, the boiling point of N2 is -196 degrees, and O2 is -183 degrees, so when liquid air is vaporized, N2 is obtained first.
3. The reaction of azo compounds and hydrogen peroxide can generate nitrogen.