Vodka Distillation: Why Column Separation Matters

Vodka is a purity project. Your job is to remove what doesn’t belong, not to ‘create character.’ That means two things: minimize heads, and minimize tails.

The difficult part is that distillation is not a perfect sorting machine. If you distill once, you get smearing: some of what you don’t want bleeds into what you keep. Vodka pushes you toward equipment and methods that can repeat the separation many times.

You’ll see why column separation matters, how repeated cycles tighten cuts, and why plate counts alone can mislead you when you’re chasing true neutrality.

Quick summary

Context: the vodka target on the grid

Vodka is defined here as a near-empty grid: no meaningful front-of-mouth heads character and no meaningful back-end tails character the vodka grid target.

That target has a direct mechanical implication: you need separation power.

Here we go, front of mouth, middle of mouth, back of mouth, a little bit in the middle, nothing at the front and the back, taste intensity, low taste intensity because it's a very pure product. You remember from the holy trinity, heads, hearts and tails. See how my drawings get worse and worse the longer I speak about it, it's because I sort of expect you to pick up on this automatically already, with the smearing points for heads and the smearing point for tails, relating to certain flavour profiles.

The core problem: separation (not more ‘flavor’)

In a flavor-driven spirit, smearing can be a tool. In vodka, smearing is a defect because it keeps heads or tails character in the center cut.

So the question becomes: how do you keep distilling cycles happening until heads and tails are concentrated into small fractions you can discard, while keeping the remaining hearts clean?

Remember how that smearing from the heads, fruity flavours, equals 30% and the smearing of the tails, 50% and just 20% in the middle for the substrate. For example the rye or the wheat or the potatoes, in this case the vodka, because we're talking vodka, is made from. If you can, off the grain, if you can, pH neutral, please control the temperature, make sure they don't go too high and don't ferment too long.

Fermentation setup for neutrality

If we look distillation of vodka, quite simply what you need to do is cut out as much of the heads and tails as possible, because if you are successful, and I'm exaggerating here on how much product you need to cut out, but just to make it visual, if you cut out all the heads and the tails smearing, you're basically left with a substrate of 20% flavour. And that correlates perfectly with this position, which is the ideal grid, the ideal definition of the flavour profile of any vodka. The issue is that if you have to use a pot still to basically do this, the separation power of a pot still, as you've learned, is only one.

Why vodka needs many distillation cycles

You need a shitload of redistillations in order to get rid of all the heads and the tails, and that means that you're left with very limited numbers of heads and tails. This is where column distillation comes into play. This is a situation of smearing, the above picture.

The skyscraper elevator metaphor

The metaphor used is a skyscraper with elevators that ‘sort’ people by weight, but only imperfectly. Heavy people go down two out of three times, and up one out of three. Light people go up two out of three times, and down one out of three.

That’s how repeated distillation cycles are described: each cycle improves the odds, and enough cycles push heavy fractions toward the end and light fractions toward the beginning, even if any single step is imperfect.

Red one for the heads, so they're over here. And let's use blue for the tails, they're over here. We're not going to use a colour for the hearts, because hey, it's vodka, they should be clear and crisp and clean, with very low flavour profile left.

14 cycles, 96%, and the ‘ceiling’

A specific benchmark is given: 14 distillation cycles are said to align with about 96% alcohol, the maximum practical purity because the alcohol-water mixture behaves unusually at that point.

The claim is practical: if you can reach and hold around 95–96%, you’re in the right territory for vodka purity.

If we do one distillation, we get a lot of smearing, or we lose a lot of product. So either we do get excess here, because we cut too wide, or we have to throw out a lot of product that we don't recover. The fun thing is that if you distill more often, you can actually create a better separation between heads, let's use the same, hearts and tails.

Why ‘more than 14’ is still useful

A second claim is that proof alone is not the whole story. Even beyond the 14-cycle point, increasing distillation cycles (up to around 40) is shown to improve separation further by pushing heads and tails into smaller, more concentrated fractions.

A specific test claim is included: results improved up to 40 cycles, but did not improve at 41 cycles.

The more often we distill, the less smearing we get. It's a bit like looking at a skyscraper, and at some floor some guys step into the elevator, and the elevator is rigged in such a way that the, well for example the heavy dudes, two out of three times go down, and only one out of three go up. And the lighter ones, two out of three go up, and one out of three go down.

Plates, packed columns, and realistic expectations

Plated columns are commonly sold with counts around 14 plates. The argument here is that if your target is extreme neutrality, 14 is still far from the ‘as close to 40 as possible’ separation target described above.

So the elevator does a selection based on weight, but it's not perfect at it. Just like distillation does a selection on molecular weight, heavy dudes here, light dudes come over first, but that selection isn't perfect because it's smearing, which is a good thing for flavour, but a bad thing for the purity we're looking for in a vodka. So imagine people stepping into those elevators, and some are the light ones, and some are the heavy ones.

Key Takeaways