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