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CE 602: Discontinuous Rectification

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Discontinuous Rectification

Discontinuous Rectification Discontinuous Rectification

Product Details


Technical Description
Distillation is used to separate liquid mixtures made up of individual liquids that are soluble in one another. Rectification refers to distillation in a countercurrent. Ethanol/water is recommended as the liquid mixture for the CE 602. The liquid mixture is added to the evaporator (bottom) tank. The mixed vapour produced moves upwards in the column. The mixed vapour contains a higher concentration of the component with the lower boiling point (ethanol). It leaves the top of the column and is condensed using a condenser and a phase separation tank. Part of the condensate is collected in a tank as product while the rest is fed back into the column. Here, on its way downwards, it undergoes further heating and material exchange with the rising mixed vapour. This exchange causes the vapour phase to become richer in ethanol and the liquid phase to become richer in water. The liquid phase moves to the bottom where it is collected. 
A sieve tray column and a packed column are available. The packed column is filled with Raschig rings. The reflux ratio is adjusted using actuating valves.
Relevant measured values are recorded using sensors and displayed digitally on the control cabinet. The evaporator is adjusted using a PID controller.
A large, clear process diagram on the control cabinet makes it easy to assign all the process variables. The well-structured instructional material sets out the technological fundamentals and provides a step-by-step guide through the measurements and experiments.

Learning Objectives / Experiments
Investigation and comparison of separation efficiency of sieve tray and packed columns:
- In discontinuous mode
- In vacuum mode
- With different reflux ratios
- With different numbers of trays
- Determination of concentration profiles
- Determination of temperature profiles
- Pressure drop over the column
- Determination of theoretical number of stages in  McCabe-Thiele diagram

Features
* Discontinuous rectification1
* Comparison of packed and sieve tray column1
* Vacuum mode possible1
* Trays in sieve tray column removable
Specification
[1] Discontinuous rectification with packed and sieve tray column
[2] Interchangeable columns
[3] Sieve tray column with 8 trays
[4] Packed column with Raschig rings
[5] Vacuum mode possible with water jet pump
[6] Electrically heated evaporator
[7] Tank for top product
[8] Condenser and phase separation tank for top product
[9] All tanks made of DURAN glass and stainless steel
[10] Adjustment of reflux ratio using actuating valves
[11] 8 temperature measuring points per column

Technical Data
Columns: internal diameter: 50mm, height: 765mm
Water jet pump: final vacuum: approx. 16mbar
Tanks:
- top product: approx. 2L
- phase separation: approx. 0.5L
Evaporator:
- power output: 0...4kW
- tank: approx. 10L
Heat exchange surface area:
- Top product condenser: 0.04m2
Measuring ranges:
- temperature: 13 x 0...150°C
- reflux ratio: 0...100%
- cooling water flow rate: 30...320L/h
- column differential pressure (U-tube):
  135...0...135mbar
- system pressure gauge:  -1...6bar

Dimensions and Weight
l x w x h : 1300 x 750 x 2300 mm
Weight : approx. 200 kg

Connections
230V, 60Hz, 3 phase or 400V, 50Hz, 3 phase
Cold water connection: 200...600L/h

Scope of Delivery
1 rectification unit, 1 set of instructional material

Order Details
083.60200  CE 602  Discontinuous Rectification
Alternative products
CE 600 -- Continuous Rectification
CE 640 -- Biotechnical Production of Alcohol

SELKA GmbH, Hamburg
Grindelallee 188, 20144 Hamburg / Germany
Tel.: + 49 (0) 40 343453 |  Fax: +49 (0) 40 63657075
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info@selkagmbh.com   |  Internet: http://www.selkagmbh.com

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