Fractionating Columns

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Vigreux Colum Fractionating 200mm

vigreux

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Vigreux Fractionating Column

 200mm effective length.

Excellent for better separation of closer boiling point compounds etc.

Acts like doing a distillation multiple times. Based on the number of theoretical plates.

 

Look at Vogel’s 5th Edition for more details.

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Vigreux Fractionating Column
New stock, Height is now 200mm

Joints are b24

200mm Effective length,

~Excellent for better separation of closer boiling point compounds etc.

Acts like doing a distillation multiple times. Based on the number of theoretical plate.

 

This item is placed after the Flask, and before a still head.
In general terms, this item is used when the boiling point of the desired Liquid/compound, is too close to other unwanted side products, when using simple distillation (ie. Without a fractionating column)

When boiling points are too close, then often both compounds will distill over together, or contaminate each other.

 

http://en.wikipedia.org/wiki/Fractional_distillation

There is a great section in Vogel’s Practical Chemistry, which explains fractional Distillation in good detail.

 

Further Notes: Additional packing’s. ie Raschig Rings, or glass beads, can further improve the separation of boiling points using a Vigreux Column.

http://en.wikipedia.org/wiki/Condenser_(laboratory)#Vigreux_column

 

Recommendations:

Often because of the extra height of the Vigreux Column, heat loss becomes more pronounced, consequently retarding efficiency or amount of distillation speed.

If your magnetic stirrer or hotplate, cannot deliver the extra compensatory power, then a lot of people have recommended the act of column wrapping or insulation. Common materials for column insulation are Glass Wool or Aluminum Foil. In years gone by, asbestos, now banned, was the preferred material.

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Vigreux Colum Fractionating 200mm

Vigreux Colum Fractionating 200mm

Vigreux Fractionating Column

 200mm effective length.

Excellent for better separation of closer boiling point compounds etc.

Acts like doing a distillation multiple times. Based on the number of theoretical plates.

 

Look at Vogel’s 5th Edition for more details.

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