There is no Webster tower in the distillation unit.

Webster's fractionator, also known as Thorne fractionator. There are a group of downward inclined spiny glass columns in the tower at regular intervals, and each group of spiny glass columns is spirally arranged in the fractionating tube. The advantages of using this fractionator are: simple instrument assembly, convenient operation and less residual liquid in the fractionator. Its disadvantage is: compared with the packed tower with the same length, the shunt efficiency is lower, and it is suitable for separating a small amount of liquids with large boiling point difference. If you want to separate liquid compounds with very close boiling points, you must use a precision fractionation device.