In devolatilization units, static mixers play a very important role. They are applied for the admixing and dispersion of a stripping agent such as water, nitrogen or CO2 into the polymer solution, as well as for the rapid vaporization of the volatiles upstream of the flash vessel.

A very low content of undesirable compounds as well as a minimum degradation of the polymer can be achieved by a short residence time and and a narrow residence time distribution in the complete unit.

Sulzer supplies complete devolitalization units with one ore more stages.

A typical Sulzer 2^nd stage devolatilization unit.

3 SMX stripping agent mixer

5 Gear pump

7 Condenser

12 Devolatilization vessel

13 Separation column

14 Stripping agent

15 Vacuum pump

16 Decanter

17 Oligomers