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High efficiency laboratory fractionation. III. A small analytical

✍ Scribed by Dixon, O. G.

Publisher
Wiley (John Wiley & Sons)
Year
1949
Weight
221 KB
Volume
68
Category
Article
ISSN
0368-4075

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✦ Synopsis

Abstract

A small still, made from heat‐resisting glass, for the fractionation of about 20 ml. of liquid, is described.

It comprises a fractionating column 6 in. long and I in. bore packed with in. gauze rings and sealed to a boiler which is fined wih an external resistance heater. The column, when tested ushg a mixture of normal heptane‐methyl Eyclohcxanc, has a performance equivatent to about 12 theoretical plates at a vaspour veiocity of 0.8 ft. per second, the dynamic liquid hold‐up is approximately I ml. and the static hold‐up is 0.1 ml. The sull may be used at atmospheric pressure to fractionate material boiling up. to 250°c. and, because of the low pressure drop, it is very suitable also for fractionation at reduced pressure.

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