Cryogenic Methods of Atmospheric Helium Production

If there was a "Red List" of endangered chemical elements of the world, helium would definitely go in the top ten of critical substances. Along with silver, zinc and germanium, helium is going to practically run out by the end of the twenty-first century. Moreover, the solar gas is the only gaseous element on this list. At the same time, a lot of modern and perspective technologies are impossible without helium. Unique physical and chemical features make it irreplaceable in scientific research, medicine, power engineering, aerospace and defence industries. Helium can be truly considered as an indicator of high technology.