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Additional recommended knowledge
This process makes use of the fact that carbon monoxide complexes with nickel readily and reversibly to give nickel carbonyl. No other element forms a carbonyl compound under the mild conditions used in the process.
This process has three steps:
3. The mixture of excess carbon monoxide and nickel carbonyl is heated to 220 - 250 °C. On heating, tetracarbonyl nickel decomposes to give nickel:
The decomposition may be engineered to produce powder, but more commonly an existing substrate is coated with nickel. For example, nickel pellets are made by dropping small, hot pellets through the carbonyl gas; this deposits a layer of nickel onto the pellets.
Some safety data
TWA – time weighted average (limit) STEL – short-term exposure limit
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Mond_process". A list of authors is available in Wikipedia.|