Formaldehyde is produced from methanol substantially by means of two types of processes: the oldest one is based on silver catalyst and is working at a methanol concentration above the explosion limit, the most modern one is based on metal oxides catalyst and is working at a methanol concentration under the explosion limit.
The main features of the two types of processes (the former called “S” and the latter called “MO”) are compared hereunder.
Of course the comparison has to be rather general, as also not all the various “S” processes available on the market are exactly the same, and similarly there are many differences between the various “MO” processes offered by the various know-how suppliers.
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