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