How are rare gases made?

Generally, it is an empty separation.

The main products of large-scale air separation stations are nitrogen and oxygen, and rare gases are ancillary products.

Some ASUs have noble gas separation, and some don't.

The most common noble gases are helium and argon.

In the industrial gas market, oxygen and nitrogen are sold in bottles, which can cost tens of dollars per bottle.

And a bottle of helium costs thousands of yuan.

As for purity, there are related processes that can be solved, liquefaction and separation is just one of the processes, and the purity of industrial gas is above now, no matter what kind of gas it is.

In addition, don't expect to find a detailed explanation in the textbook, some key technologies of air separation are still in the hands of a few multinational companies, and it is normal for us not to understand...

Separation from the air, you're talking about the high cost, I don't think so, otherwise how could you get so much gas? Large-scale separation, which is not very expensive, for example, I separate oxygen, nitrogen, and noble gases, and so on, and sell them all, and it becomes a market, and if there is demand, there will be production.

Inert gases can only be solved with air separation.

Some gases are prepared by redox or catalytic enzymes.

Helium is mainly separated from helium-rich natural gas. Neon, krypton, and xenon are mainly separated from the air, and radon is generally unstable.

There are seven kinds of noble gases, helium (He), neon (Ne), argon (Zhenqing Hall), krypton (Krypton), xenon (Xe), radon (RN, radioactive), and gas (OG, radioactivity). Among them, OG is a rare gas synthesized artificially, and the nucleus is very unstable, with a short half-life of only 5 milliseconds.

Noble gases are colorless, odorless, tasteless, slightly soluble in water, and the solubility increases with the increase of molecular weight. The molecules of noble gases are all made up of single atoms, and they have low melting and boiling points, and as the atomic weight increases, the melting and boiling points increase. They can both liquefy at low temperatures.

Noble gasescompounds

In the atoms of noble gas elements, the arrangement of electrons in the various electron shells reaches just a stable number. Therefore, it is not easy for atoms to lose or gain hidden electrons, and it is difficult for them to chemically react with other substances, so these elements are called "noble gas elements".

Among noble gas atoms with larger atomic weights and more electrons, the outermost electrons are farther away from the nucleus and are less bound by slippage. If you encounter other atoms that attract strong electrons, these outermost electrons are lost, resulting in a chemical reaction.

The above content reference: Encyclopedia - Noble Gases.

Noble gases are group zero (class) elements in the periodic table. Noble gases include six elements: helium (He), neon (Ne), argon (Ar), krypton (KR), xenon (XE), and radon (RN), of which radon is a radioactive element. With the exception of radon, it can be obtained by step-by-step distillation of liquid air.

Nomenclature of metals and non-metals.

Metallic elements. Of the 112 known elements, more than 80 are metallic elements, and their Chinese names all contain "gold" sideways, with the exception of mercury (commonly known as mercury) because it is liquid at room temperature.

Non-metallic elements.

There are more than 20 kinds of non-metallic elements, and the side of the Chinese name is determined according to their state at room temperature. Solid state is written next to "stone", such as carbon, sulfur, silicon, iodine, etc.; Liquid writing next to "", such as bromine; The gaseous state is written as "gas", such as hydrogen, oxygen, fluorine, chlorine, helium, etc.

From the above, we can see that noble gases are included in non-metallic elements.

Noble gases include helium, neon, argon, krypton, xenon, and radon. Chemically inactive, it can be used as a protective gas and point light source, such as neon lights.