A process 1, wherein the hot formaldehyde containing product gas is cooled to a temperature above {HEAD ~ the dew point} of the product gas in {TAIL ~ the waste heat boiler} by the heat exchanging 
A process 1 , wherein the hot formaldehyde containing product gas is cooled to a temperature above { HEAD ~ the dew point } of the product gas in { TAIL ~ the waste heat boiler } by the heat exchanging
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH