The “Mond Process”
Introduction
In 1890 Ludwig Mond, investigating the unusually rapid corrosion of nickel valves used in apparatus for the industrially important Solvay process, reported a new compound, Ni(CO)4. This appears to be the first metalcarbonyl to be isolated. Whilst nickel compounds usually are green coloured solids, tetracarbonylnickel is a colourless, volatile liquid with a very “organic character”. Also this compound is very toxic. These facts made Ludwig Mond investigate this coumpound thoroughly. He used it as the basis of a method to purify nickel, called the “Mond process”.
Carbon monoxide is a ligand that forms complexes with most transition metals, “metal carbonyls”. Although carbon monoxide is not a strong Lewis base, it does form strong bonds to transition metals. The carbonyl group is much used in organometallic syntheses because it forms metal carbonyls which are useful starting materials for other organometallics.
Mai 10th, 2004 15:03
It is mainly used to remove the chemical fibre-finish deposits on heating elements such as heating plates .tubes and other heating elements on texturing machine .fiber lines and draw twisting units .etc. to make surface of the heating elements bright and clean.