Formox process

 ( Chemical Processes ) 

The Formox process produces formaldehyde. Formox is a registered trademark owned by Johnson Matthey. The process was originally invented jointly by Swedish chemical company Perstorp Group and Reichhold Chemicals.

Alan E. Comyns (2014). 9781466567771, CRC Press. . ISBN 9781466567771

Industrially, formaldehyde is produced by Catalysis oxidation of methanol. The most commonly used catalysts are silver metal or a mixture of an iron oxide with molybdenum and/or vanadium. In the recently more commonly used Formox process using iron oxide and molybdenum and/or vanadium, methanol and oxygen react at 300-400°C to produce formaldehyde according to the chemical equation:

methanol + ½ oxygen → H₂CO + H₂O.

The silver-based catalyst (see also: the Fasil process) is usually operated at a higher temperature, about 650 °C. On it, two chemical reactions simultaneously produce formaldehyde: the one shown above, and the dehydrogenation reaction:

methanol → H₂CO + hydrogen

Further oxidation of the formaldehyde product during its production usually gives formic acid that is found in formaldehyde solution, found in parts per million values.

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