Bentonite

Become a Premium Member today!

A clayey rock formed by the weathering of volcanic ash. It was named after the first place where it was found near Fort Benton in the US state of Wyoming. The mineral, also known as alumina, consists of calcium, sodium and aluminium silicates. It has a high adsorption capacity (accumulation of gases or dissolved substances) and a good swelling capacity and thus an increase in volume. In viticulture, low-swelling calcium bentonites or medium-swelling mixed bentonites (calcium and sodium) are used for various fining or stabilisation techniques such as protein or heat stabilisation. In this process, the thermolabile protein is removed. Untreated wines can already form heat turbidity at temperatures of 17 to 20 °C. The treatment can be carried out in the grape must or in the wine.

To read the full text, you must be a Premium Member of wein.plus. You are currently not logged in to wein.plus. Become a Premium Member or log in with your credentials .

Become a Premium Member of wein.plus

Voices of our members

Using the encyclopaedia is not only time-saving, but also extremely convenient. What's more, the information is always up to date.
Markus J. Eser
Weinakademiker und Herausgeber „Der Weinkalender“

Welcome back!

Bentonite

To read the full text, you must be a Premium Member of wein.plus. You are currently not logged in to wein.plus. Become a Premium Member or log in with your credentials .

Voices of our members

The world's largest Lexicon of wine terms.

EVENTS NEAR YOU