Thin Film & Short Path Distillation

Short Path Distillation

The UIC Short Path Distillators normally operate within a pressure range of 0.001 to 1 mbar.

The product to be treated flows along the inside wall of the evaporator as a liquid film from the supply point to the discharge point. The residence time in the apparatus is very short. Thus thermal stress is minimal. We have developed a unique wiper system for the operation inside the evaporator which ensures an even distribution of liquid on the evaporator surface and ideal mixing of the product which flows downwards. This means that volatile substances are continuously brought to the film surface and evaporate more efficiently. Heating of the evaporator is made via heat transfer medium, e.g. thermal oil or steam.

A special feature of this apparatus is the condensation of vapors on the internally positioned condenser. The ‘short path’ of the vapor phase to the condenser results in only little pressure loss, meaning that extremely low pressures can be achieved. Therefore, in Short Path Distillators, in comparison to Thin Film Evaporators, distillation can take place at considerably lower temperatures. This process is most gentle for the product.

Material Processed

  • Borosilicate glass
  • Special steels 1.4571, 1.4404, 1.4301 and Hastelloy
  • Other special steels available on request

Design Dimensions

  • Heating surface from 0.01m2 to 75m2
  • Large devices available on request

Supply Rates

  • Feeding volumes of 1 kg/h to 10,000 kg/h can be achieved
  • Higher feeding rates possible on request

Thin Film Evaporation

The UIC Thin Film Evaporators normally operate within a pressure range of 1 mbar and 100 mbar. The product to be treated flows along the inside wall of the evaporator as a liquid film from the feed point to the discharge point. The residence time in the vessel is very short reducing thermal stress to a minimum. We have developed a unique wiper system for the operation inside the evaporator supporting even distribution of liquid on the evaporator surface and ideal mixing of the product which flows downwards. This means that volatile substances are continuously brought to the film surface and evaporate more efficiently. Heating of the evaporator is made via heat transfer medium, e.g. thermal oil or steam. The evaporated compounds are condensed in an externally positioned condenser. 

Thin Film Evaporators are used in the of mentioned vacuum range or in case of high viscous residue and also solids containing residue. Our wiper system can be modified to a rigid blade system if required.

Material Processed

  • Borosilicate glass
  • Special steels 1.4571, 1.4404, 1.4301
  • Hastelloy
  • Other special steels available on request

Building Dimensions

  • Heating surfaces from 0.01m2 to 75m2
  • Large devices available on request

Supply Rates

  • Feeding volumes of 1 kg/h to 10,000 kg/h have been achieved
  • Higher feeding rates possible on request

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