Menetelmä paraformaldehydin valmistamiseksi

摘要

The process comprises providing a formaldehyde solution at a concentration of 80-89 %; heating the solution to a temperature of 80-100 DEG C; pouring the heated solution over heated zones on a metal belt conveyor travelling from the heated zones to other, chilled zones. The formaldehyde solution is preferably previously mixed with a catalyst.