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In the Mond Process (also known as the Carbonyl Process), carbon monoxide combines with [[Nickel]] at 50-60 C to form nickel tetracarbonyl gas.  This removes nickel from impurities, none of which form a carbonyl at such a low temperature.  Heating nickel tetracarbonyl to 220-250 C decomposes it into pure nickel and carbon monoxide. Nickel can be deposited on an object that is heated to the nickel tetracarbonyl decomposition temperature in the presence of the gas; the process can also be engineered to produce fine nickel particles. Nickel produced in this manner is referred to as carbonyl nickel.

Various other metal carbonyls such as [[Iron]] pentacarbonyl and [[Chromium]]  hexacarbonyl form at various temperatures and pressures, giving the possibility for separating pure metals from mixtures in a similar manner to nickel. [[Iron]] carbonyl extraction in particular is already utilized in terrestrial applications for the production of very pure iron particles, known as carbonyl iron.

== Related Articles ==
*[[Carbonyl Metals Plant]]

== External Links ==
*[http://en.wikipedia.org/wiki/Mond_Process Mond Process on Wikipedia]
*[http://en.wikipedia.org/wiki/Carbonyl_iron Carbonyl Iron on Wikipedia]


[[Category:Industrial Production]]