What are the different types of stills and briefly how does each one work and differ from the other one?

Question

I have David Blume's book "Alcohol Can Be a Gas" book, and it basically talks about how you can convert your gasoline engine to running on alcohol, and it also talks about how to make alcohol.

In one chapter, he talks about distillation and the different types of stills, but I looked up these stills on the internet, and there is no information to be found on the internet about these stills.

This is what is in his chapter:

simple still
perforated column still
bubble cap column still
solar still
batch distillation
continuous still
vacuum still
azeotropic methods

I typed in simple still, vacuum still, and azeotropic still on google and hardly anything came up.

He doesn't talk about reflux or pot stills or anything like that

The internet says there is only three basic types of stills - pot, reflux, and column

Answer 1

http://homedistiller.org/equip/types



*The internet says there is only three basic types of stills - pot, reflux, and column*

Yes that is true for distillation and applications in distillation of beverage alcohol especially. From these specialized stills which, are used for a particular applications whether laboratory or industrial/food applications, all other still emerge.

Answer 2

A simple still is one with a copper tube that has a water jacket. It is the basis for most stills people use. A perforated still is a cooper chamber with multiple stages and perforations between them. A bubble cap is a chamber with a cap that holds the vapor, and lets it slide from the cap walls inside the chamber. A Solar still is simply one that uses solar power to evaporate. It is most commonly used for water. Batch distillation is a process, not a still, these are commonly used in home distillation. And are opposed to a continuous still, the kind that are used commercially. A vacuum still is what is commonly found in laboratories, not home distillation. Azeotropic methods also is not a still but the process by which things are separated. This is very common in ethanol distillation where the batch is separated into heads, middles and tail.



What you left of is a reflux or valved reflux. These are more common in distillation where that copper column is recirculated though out the distillation process. They are also often filled with small glass beads to help the condensation.

Answer 3

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