The rare gas of xenon and krypton in the air contains less than one part per million. A bottle of 40 liters of xenon gas is more expensive than a car and can be called "gas gold".

How to extract rare gas

According to reports, rare gases mainly include helium, neon, argon, krypton, and xenon, accounting for 0.94% of the air volume, most of which are argon, and the content of other gases is very small. For example, the content of xenon is only 100%. 0.08 in 10,000.

Rare gas has a wide range of uses. It emits light of different colors after power on. It is widely used in lighting, such as xenon in car headlights and neon in traffic lights. It can also be used in cutting-edge fields such as aerospace plasma engines, lasers, cryogenic superconductivity, and nuclear industry.

How can the rare gas be extracted with such a rare content of "gas gold"?

According to reports, the principle is actually very simple. It mainly uses the characteristics of different boiling points of different gases. "The temperature is reduced to minus 172°C to minus 192°C through air compressor pressurization, gas expansion refrigeration and throttling refrigeration characteristics. The air becomes liquid, then repeatedly condenses and evaporates, and separates different components at different temperature ranges. For example, when the temperature drops to about -182°C, oxygen changes from gas to liquid and is separated from the liquid space. Krypton Gases such as xenon are generally present in liquid oxygen and require further cryogenic distillation and separation."

At present, only a few domestic gas companies have the ability to prepare rare gas, and the output is small. The rare gas has always been "sweet" in the market. Niu Ruide special gas has business, xenon, neon, argon, krypton, etc. There are various neon gas mixtures (neon-argon gas mixture, neon-nitrogen gas mixture, neon-helium gas mixture used in laser, laser, lighting industry, etc.).