🥃 Column still
Continuous distillation apparatus of tall columns with plates; its improved version was patented by Aeneas Coffey in 1830, giving lighter and stronger spirit than a pot still.
A column still, also called a Coffey still, is the continuous distillation apparatus behind most grain whisky, vodka and many rums and brandies. Unlike a copper pot still, which distils the wash in batches, the column works without stopping: fermented wash is constantly fed in, and spirit is constantly taken off.
How it works. The column is a tall tower with dividing plates. Heated wash is fed onto a middle plate, and hot steam rises from below. It evaporates the spirit and aromas; light substances rise, heavy ones flow down. Each plate acts as a small pot still, so the more plates, the purer and stronger the spirit.
History. Continuous stills appeared at the start of the 19th century; in 1814 a similar patent was granted in Auch, in the Armagnac region. The Scottish inventor Robert Stein built a column around 1828, and the Irish excise officer Aeneas Coffey improved it and patented it in 1830. His apparatus has two copper columns: an analyser and a rectifier. According to Whisky Magazine, it produced more than 2,000 gallons of spirit a day.
Limits. EU law limits the strength of distillation to preserve the character of the raw material: whisky below 94.8% ABV, rum below 96%, grape and fruit distillates below 86%. So the apparatus is set differently: for vodka for maximum purity, for Armagnac or bourbon for lower strength and more aroma.
Why this matters to you. The words "column distilled", "grain" or "Coffey" on a label suggest a lighter style, while "pot still" suggests a richer one. Spirit from a column is very strong and is diluted before bottling. The WHO reminds us: there is no safe level of alcohol consumption.
Facts
| Distillation method | continuous distillation; Coffey still — two columns: analyser and rectifier |
|---|---|
| Year founded | Aeneas Coffey’s patent — 1830 |
| Legal basis | Regulation (EU) 2019/787: whisky < 94.8% ABV, rum < 96%, grape and fruit < 86% |
How it connects to Spirits
🥃 Column still → kind of → ⚗️ How spirits are made → kind of → 🥃 Spirits
Links
- Next step
- 🥃 Single Grain Scotch Whisky, 🥃 Blended Grain Scotch Whisky, 🥃 Nikka Coffey Grain, 🥃 Bourbon whiskey, 🥃 Armagnac, 🍸 Vodka, 🥃 Rum
- Previous step
- 🥃 Grain spirit, 🥃 Rhum de la Martinique, 🥃 Master distiller, 🥃 Loveshka slivova rakya, 🥃 Troyanska slivova rakya, 🥃 Rhum de sucrerie de la Baie du Galion, 🥃 Teeling Single Grain
- What it affects
- 🍷 Alcohol and health
- Part of
- ⚗️ How spirits are made
- Similar and different
- 🥃 Charentais alembic, 🥃 Single Pot Still Irish Whiskey, 🥃 Triple distillation
Frequently asked questions
Does a column still make worse spirit than a pot still?
No. It gives a different style, lighter and purer. Quality depends on the raw material, the column settings and the ageing.
Who invented the column still?
The first commercially successful one was the apparatus of the Irishman Aeneas Coffey, patented in 1830; earlier similar designs were made by Robert Stein and inventors in France.
What is the difference between a column still and a pot still?
A pot still distils in batches and must be reloaded; a column works continuously and can give much stronger spirit.
Which whiskies and spirits are made in column stills?
Grain Scotch whisky, bourbon, vodka, light rums, Armagnac and many brandies.
What are the analyser and the rectifier in a Coffey still?
The two columns of the apparatus: in the analyser steam separates the spirit from the wash, and in the rectifier the spirit is concentrated to the required strength.
What to read next
- 🍷 Alcohol and health — Alcohol in any drink is harmful in large amounts, and the risks grow with the quantity.
- 🥃 Rum — A distillate of sugar-cane molasses, syrup or juice: in the EU at least 37.5% ABV, no flavourings or added alcohol, up to 20 g/l of sugar; in the US bottled at 40% ABV (80 proof) or more.
- 🥃 Rhum de sucrerie de la Baie du Galion — EU-protected name for rum from the Galion sugar factory in Martinique: made only from molasses and sugar-production syrups; blanc, brun (6+ months in oak), grand arôme; from 40% ABV.
- 🥃 Charentais alembic — Copper pot still from the Charente region, the only apparatus allowed for cognac: white wine is distilled twice over open fire; pot up to 30 hl, spirit up to 73.7% ABV.
- 🥃 Nikka Coffey Grain — Nikka Coffey Grain is a Japanese grain whisky from Nikka made in a Coffey column still: mostly corn, used American oak barrels; 45% ABV, since 2012.
Similar
🥃 Double distillation · 🥃 Heads, hearts, tails · 🥃 Triple distillation · 🥃 Distillation · 🥃 Blending · 🥃 Ethyl alcohol of agricultural origin
⚠️ Spirit drinks contain alcohol and are for adults only. Alcohol harms health. Do not drink during pregnancy or before driving; check the label for ingredients and possible allergens.
Sources
- Oxford Companion to Spirits & Cocktails (spiritsanddistilling.com): Coffey, Aeneas (1780–1852) — first commercially viable continuous still for grain, patented 1830; analyzer and rectifier copper columns; Robert Stein's earlier design; Grange first Scottish distillery to install it, 1834
- Whisky Magazine: Whisky production — how a column still works (feed plate, live steam, plates as miniature batch stills, reflux, continuous operation; Coffey still 1830, over 2,000 gallons per day)
- Whisky Advocate: Coffey still (glossary) — two columns with perforated plates, steam rising through them, continuous distillation, higher strength than a pot still
- Regulation (EU) 2019/787 on spirit drinks (OJ L 130, 17.5.2019), Annex I: maximum distillation strengths: whisky < 94.8 % vol., rum < 96 % vol., wine and fruit spirits < 86 % vol.
- WHO/Europe: No level of alcohol consumption is safe for our health (04.01.2023)