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Because alcohol kills things. Most varieties of yeast are killed at 10%, but some can stand up to 14%. So you have to distill it to get above that figure. You can't get pure alcohol by distilling because the alcohol and water blend to make a hazeotrope that evaporates at a lower temperature than either one by itself.

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9y ago
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10y ago

When the concentration of ethanol reaches a certain point, the yeast will be killed.(ethanol is used for sterlization after all)

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9y ago

Fermentation is the only economically practical way to make any more than a trivial quantity of ethanol.

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Q: Why absolute alcohol cannot be prepared by fermentation process?
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Related questions

Why absolute alcohal cannot be prepared by fermentation process?

That high a concentration of ethanol is toxic to the organisms doing the fermentation.


What is the name of the process that converts sugar to alcohol?

Fermentation


Which process is taking place if an organism produces alcohol from a sugar solution?

The process is ethanol fermentation or alcoholic fermentation. You will get H20, CO2 and alcohol.


Which process is taking place if an organism produces alcohol from sugar solution?

The process is ethanol fermentation or alcoholic fermentation. You will get H20, CO2 and alcohol.


What is the microbial process that converts sugar to alcohol?

_______ is the formation of alcohol from sugar. Answer Lactic acid fermentation Glycolysis Yeast Alcoholic fermentation


Process used to make bread rise lactic acid fermentation or alcoholic fermentation?

alcohol fermentation -- the ethanol (alcohol) and carbon dioxide are produced by the yeast.


What process by which alcohol is made by yeast is called?

It is called "fermentation" to be precise "aerobic fermentation".


Fermentation products be distilled to produce liquors?

Yes. Distillation just separates the alcohol from the water, fermentation gives you the alcohol in the first place.


During lactic acid fermentation alcohol and carbon dioxide are produced?

The process that produces ethanol is alcoholic fermentation. The process that produces lactic acid is lactic acid fermentation.


What is the chemical process that results in alcohol production in winemaking and brewing beer?

The Ethyl alcohol (or ethanol) in wine and beer is the product from alcohol fermentation, where yeast convert the sugars into ethanol, commonly known as ethyl alcohol, and carbon dioxide (as a by-product).Cheers:)VinoEnology.com


The process by which alcohol is changed to carbon dioxide and water?

fermentation


What is the process used to produce concentrated forms of alcohol?

It is Fermentation.