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4 L Melt-Polycondensation Reactor

This system includes a 4-litre polycondensation reactor as the main reactor. The optimum amount of melt is approx. 2 kg. It has 2 steam lines. Firstly, there is a column as a dephlegmator followed by a condenser. This allows a highly volatile component to be separated and a component with a higher boiling point to be condensed and recovered at the same time. Additionally, there is a straight tubular condenser in which a component can be separated under high vacuum. The tubular condenser with double jacket allows easy cleaning of this part if it should become clogged with oligomers.

The high-temperature thermostat enables flow temperatures of up to 330 °C and is superimposed with nitrogen to protect the oil. The bottom valve with outlet nozzle is heated. The system is fully automated and equipped with an industrial process control system. A customizable recipe system for setting different process controls ensures flexible definition of the process steps and enables reliable operation.


  • 4 L polycondensation reactor made of stainless steel 1.4404/1.4571.
  • Mainly used for polyesters and polyamide.
  • Allows esterification and polycondensation in the same vessel.
  • Vacuum down to 0.1 mbar with integrated liquidified nitrogen trap..
  • Max. allowable pressure 16 bar at 350 °C, operating pressure up to 12.8 bar @ 330 °C.
  • 2 separate thermostats, one high temperature thermostat with a range of 40 to 330 °C for the reactor, the other for the partial condenser-column.
  • Lifting system to allow handling by a single person.

Technical Specification

Dimensions L x D x Hmm1750 x 800 x 2150
Electrical supply3P ~ 400 V / 50 Hz / 32 A
Ambient conditions°C0 to 35
Temperature specifications°C-1 to 350
Pressure databarg-1 to 16, recommended max. operating pressure 12.8 bar
Vacuum 0.1-0.5 mbar abs.
Reactor total/heated volumel5/4, min. Volume 1 l
Container2x stainless steel tanks (1 l) with glass cold trap (250 ml) and Dewar vessel
ThermostatskW9 / 50-330 °C and 2 / 60-140 °C
OtherColumn with condenser, EC condenser, vacuum pump
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