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Neon is available to commercial users in the form of a compressed gas. It comes in heavy steel cylinders, and is marketed by companies like Praxair, Linde, Airgas and more suppliers. Welders and others use it, as do sign makers. Neon is an inert gas, and it is not found chemically combined with other atoms. That translates into the fact that it is floating around in air with the nitrogen, oxygen and other gases that make up the air around us.

To get neon and other gases from air, we perform a liquefaction process. This means turning the air into liquid. By compressing air and cooling it, and then allowing it to decompress, a large drop in temperature will occur. Repeating this will cause gases to beome liquid, and by fractional separation (based on the idea that different gases become liquids at different temperatures), we can recover nitrogen, oxygen, and other gases. This will include inert gases in air, of which neon is one.

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