Process description

The process is based on the concentration under vacuum of a formaldehyde aqueous solution, of the characteristics which are easily obtainable when such solution is produced in a methanol oxidation plant of ALDER design.
After a concentration made at carefully controlled conditions, the obtained clear solution of the desired strength is flaked on a chilled band conveyor.
The flakes are dried, stored and bagged.
The water evaporated together with some formaldehyde during the concentration stage, is condensed obtaining a diluted solution, which can be recycled, after treatment, in the methanol oxidation plant.