Method and apparatus for separating volatile compounds during the polycondensation reaction and to generate a pressure reduction

摘要

Oligomer deposits and monomer can be separated volatile condensable components of the vapor from the last stage of the melt phase polycondensation and generates the present invention relates vacuum, and reduces the steam capacity compared to prior art methods provide a method for avoiding the failure caused. [SOLUTION] The reactor to be vacuum, steam jet apparatus of one or more attached to the spray condenser to be located upstream or downstream thereof is connected at the suction side, this object is achieved when the It is solved by phenol-containing liquid or liquid phenol is used as a spray material phenol-containing vapor and is used or phenol with a pressure of about 1.5MPa 0.5hPa~ as drive steam.