# 6.12 Describe a method for refining nickel.

Nickel is refined by Mond's Process, in which Nickel is heated in steam in presence of Carbon monoxide ($CO$) to form nickel carbonyl complex .$(Ni(CO)_{4})$ The complex is volatile in nature.

$Ni+4CO\overset{330K-350K}{\rightarrow} Ni(CO)_{4})$

This complex is decomposed at high temperature to get a pure nickel.

$Ni(CO)_{4}\overset{450K-470K}{\rightarrow} Ni+4CO$

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