METHOD OF RECOVERING LOW-BOILING SUBSTANCES FROM A POLYMER LATEX

摘要

In a process for recovering low-boiling point substances wherein a low-boiling point substance-containing polymer latex is atomized from a nozzle equipped at the upper part of an evaporator to evaporate the low-boiling point substances, the polymer latex is atomized over the surface of a polymer latex retained in a first evaporator maintained at a pressure of 50 to 130 torr, and then, the polymer latex is atomized over the surface of a polymer latex retained in a second evaporator maintained at a pressure of 100 to 240 torr which is higher than that of the first evaporator; each of the polymer latexes to be atomized in the first and second evaporators is maintained at a temperature of 10 to 30 DEG C higher than the saturated steam temperature in the respective evaporator. By this process, low-boiling point substances such as unreacted monomer can be recovered with high efficiency from the polymer latex. <IMAGE>