Difference between revisions of "Claisen flask"

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==General==
 
==General==
The Claisen flask is generally used for reduced-pressure distillation. The flask was designed to reduce the probability of having to repeat the distillation, due to bumping of the boiling liquid. It is similar to a [[Würtz flask]], though the distinctive feature of the Claisen flask is a U-shaped neck fused on the top of the flask. The flask itself is often round-bottom or pear-shaped. The U-shape (or bifurcation) is similar to that of a Claisen adapter, hence the name. This design makes it impossible for any splash of distilling liquid projected by bumping to reach the distillate.<ref>https://pubs.acs.org/doi/abs/10.1021/ed075p638</ref>
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The Claisen flask is generally used for reduced-pressure distillation. The flask was designed to reduce the probability of having to repeat the distillation, due to bumping of the boiling liquid. It is similar to a [[Würtz flask]], though the distinctive feature of the Claisen flask is a U-shaped neck fused on the top of the flask. The flask itself is often round-bottom or pear-shaped. The U-shape (or bifurcation) is similar to that of a [[Adapter#Claisen_adapter|Claisen adapter]], hence the name. This design makes it impossible for any splash of distilling liquid projected by bumping to reach the distillate.<ref>https://pubs.acs.org/doi/abs/10.1021/ed075p638</ref>
  
 
Some Claisen flasks have with a short [[fractionating column]] on the side arm.
 
Some Claisen flasks have with a short [[fractionating column]] on the side arm.
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Claisen flasks are made of good quality borosilicate glass.
  
 
==Availability==
 
==Availability==
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<references/>
 
<references/>
 
===Relevant Sciencemadness threads===
 
===Relevant Sciencemadness threads===
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*[http://www.sciencemadness.org/talk/viewthread.php?tid=16950 preparation of ethyl formate]
  
 
[[Category:Lab equipment]]
 
[[Category:Lab equipment]]
 
[[Category:Glassware]]
 
[[Category:Glassware]]

Latest revision as of 16:23, 19 March 2019

The Claisen flask or Claisen distillation flask is a special type of distillation flask used in several procedures, like vacuum distillation. It was invented by Rainer Ludwig Claisen.

General

The Claisen flask is generally used for reduced-pressure distillation. The flask was designed to reduce the probability of having to repeat the distillation, due to bumping of the boiling liquid. It is similar to a Würtz flask, though the distinctive feature of the Claisen flask is a U-shaped neck fused on the top of the flask. The flask itself is often round-bottom or pear-shaped. The U-shape (or bifurcation) is similar to that of a Claisen adapter, hence the name. This design makes it impossible for any splash of distilling liquid projected by bumping to reach the distillate.[1]

Some Claisen flasks have with a short fractionating column on the side arm.

Claisen flasks are made of good quality borosilicate glass.

Availability

Claisen flasks can be purchased from lab suppliers or online.

Projects

See also

References

  1. https://pubs.acs.org/doi/abs/10.1021/ed075p638
  2. http://www.sciencemadness.org/talk/viewthread.php?tid=16950

Relevant Sciencemadness threads