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Products  |  Process Engineering  |  Thermal Process Engineering  |  CE 620
CE 620 Liquid-Liquid Extraction Show data sheet (pdf file) Print page
Technical Description

  The CE 620 allows liquid mixtures to be separated using liquid-liquid extraction.
  The liquid mixture to be separated is delivered from the feed tank into the bottom of the extraction column using a pump. There, it moves in counterflow towards the solvent, which is delivered into the top of the extraction column by a pump. The mixture to be separated is made up of a transition component and carrier liquid. The carrier liquid and the solvent are insoluble in one another and therefore a phase boundary is established in the column. This can be observed and can be adjusted using two valves. The movement of the transition component from the carrier liquid into the solvent occurs inside the column. Two three-way valves can be used to operate the trainer as a continuous or a discontinuous process.

  A distillation unit facilitates the enrichment of the transition component in the extract. This consists of a heated round-bottomed flask with a packed column and a distillation bridge with Liebig condenser. The enriched extract leaves the column at the top and is collected in a tank. The bottom temperature is measured by a sensor, displayed digitally and controlled using a PID controller. The temperature at the top of the distillation column is also measured. Distillation removes the solvent from the transition component which is collected at the bottom of the unit and can be drawn off as a product. The separated solvent is collected in a tank and can be reused for extraction.

  For a ternary material system, rapeseed oil is recommended as the carrier liquid with ethanol as the transition component and water as the solvent. For this ternary material system the concentrations of extract, top and bottom product are determined by measurement of density. A conductivity meter is included for alternative ternary material systems.

  The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments.

Learning Objectives / Experiments

- transition of a component from a two-component

  liquid mixture into a solvent by extraction
- scale-up from beaker experiment to pilot plant scale
- enrichment of transition component in extract by

- evaluation of separation processes via


  measurement and mass balances
- influence of different experimental options on

  separation processes


* Separation of a liquid mixture by liquid-liquid

  extraction in counterflow operation1
* Enrichment of extract using integrated distillation

* Operation in either continuous or discontinuous

  process mode is possible1
* Design and materials allow investigation of different

  ternary systems1
* Adjustment and observation of phase boundary


Alternative products
CE 630 -- Solid-Liquid Extraction

[1] liquid-liquid extraction in counterflow operation with distillation for enrichment of the extract

[2] operation as continuous or discontinuous process using 2 three-way valves
[3] glass extraction column
[4] distillation column and distillation bridge with Liebig condenser

[5] electrical bottom heating via PID controller
[6] water jet pump for reduction of evaporation temperature during distillation
[7] stainless steel tanks for feed, solvent, raffinate, extract and top product (distillation)
[8] 2 pumps to deliver the feed and solvent
[9] 2 valves for adjusting the phase boundary
[10] distillation column packed with Raschig rings


Technical Data

- extraction: diameter: 40mm, height: 1.500mm
- distillation: diameter: 30mm, height: 415mm
Bottom heater power output: 1.200W
- feed and raffinate: approx. 30L each
- solvent and extract: approx. 15L each
- top product (distillation): 15L
- bottom tank (distillation): approx. 5L
Feed pump
- max. flow rate: 1.000ml/min
- max. head: 80m
Solvent pump
- max. flow rate: 1.200ml/min
- max. head: 10m
Water jet pump: final vacuum: approx. 200mbar
Measuring ranges
- temperature: 1x 0...150C, 1x 0...120C
- flow rate: 2x 100...850ml/min (water)

- pressure: -1...0,6bar

- conductivity:0...1.990μS/cm


Dimensions and Weight
LxWxH: 1.350x750x2.150mm
Weight: approx. 180kg
Required for Operation
230V, 50/60Hz, 1 phase or 120V, 60Hz/CSA, 1 phase
Water connection: 720L/h
Scope of Delivery

1 trainer

2 glass cylinders

1 measuring cup

1 stirrer
1 conductivity meter

1 set of hoses
1 set of instructional material

Order Details
083.62000  CE 620  Liquid-Liquid Extraction
© 2005 G.U.N.T. Gerätebau GmbH