METHOD FOR PREVENTING POLYMERIZATION IN THIN-FILM TYPE EVAPORATING DEVICE

摘要

A METHOD IS PROVIDED FOR PREVENTING AN EASILY POLYMERIZABLE SUBSTANCE FROM BEING POLYMERIZED IN A THIN-FILM TYPE EVAPORATING DEVICE BY SUPPLYING A SOLUTION OF THE SUBSTANCE TO THE EVAPORATING HEATING SURFACE (3) OF THE DEVICE BY THE CENTRIFUGAL FORCE OF A STIRRING ROTARY SHAFT (4), CHARACTERIZED BY MIXING A DISTILLED VAPOR OF THE SUBSTANCE WITH A MOLECULAR OXYGEN-CONTAINING GAS AND SUPPLYING THE EXTRACTED LIQUID OR A SOLUTION HAVING LOWER VISCOSITY THAN THE EXTRACTED LIQUID TO A FEED RAW MATERIAL INLET (1) THEREBY ADJUSTING THE QUANTITY OF A WETTING LIQUID PER UNIT LENGTH OF THE SURFACE IN THE RANGE OF 0.02 - 2 M3/MHR. IN THE EVAPORATION OF THE SUBSTANCE BY THE USE OF THE DEVICE, A METHOD FOR PREVENTING THE SUBSTANCE FROM POLYMERIZATION IS PROVIDED.