Dry ice what is it?

Dry ice is carbon dioxide in its solid state. The description «dry» refers to the property of sublimation. Under ambient pressure, dry ice passes directly - without liquefaction - from its solid into its gaseous state.

In practice, the production of dry ice is carried out by releasing cryogenic liquefied CO2 from the pressure of a suitable storage tank to atmospheric pressure. The dry ice snow produced in this way is subsequently pressed to dry ice in the form of pellets, blocks and discs.

The carbon dioxide used for this purpose comes predominantly from already existing natural sources or from chemical processes ( e.g.  ammonia synthesis). The CO2, or -dry ice-, gained from these processes is subjected to further utilization.