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11 answers

Put it in the freezer. The water will freeze and the alcohol will not.

2006-08-24 12:39:47 · answer #1 · answered by Anonymous · 0 1

Alcohol is produced by yeast during the process of fermentation. The other product of fermentation is carbon dioxide, which is the gas that can make beer bottles explode or blow their tops off. The amount of alcohol in the finished liquid depends on how much sugar there was at the beginning for the yeast to convert into alcohol. In beer, the alcohol is generally 3% to 12% (6 to 24 proof) and usually about 4% to 6% (8 to 12 proof). Depending on the strain of yeast, wines top out at about 14% to 16% (28 to 32 proof), because that is the point in the fermentation process where the alcohol concentration denatures the yeast. Since the 1990s, a few alcohol-tolerant 'superyeast' strains have become commercially available, which can ferment up to 20%. [2] Very few microorganisms can live in alcoholic solutions. The main three are yeast, Brettanomyces, and Acetobacter. In what is essentially disinfection, yeast keeps multiplying as long as there is sugar to "eat", gradually increasing the alcoholic content of the solution and killing off all other microorganisms, and eventually themselves. There are "fortified" wines with a higher alcohol concentration than that because stronger alcohol has been mixed with them. As this is usually done before fermentation is complete, these products contain a much higher quantity of sugar and therefore are typically quite sweet. Stronger liquors are distilled after fermentation is complete to separate the alcoholic liquid from the remains of the grain, fruit, or whatever it was made from. The idea of distillation is that a mixture of liquids is heated, the one with the lowest boiling point will evaporate (or "boil off") first, and then the one with the next lowest boiling point, and so on. The catch is that water and alcohol form a mixture (called an azeotrope) that has a lower boiling point than either one of them, so what distills off first is that mixture that is 95% alcohol and 5% water. Thus a distilled liquor cannot be stronger than 95% (190 proof); there are other techniques for separating liquids that can produce 100% ethanol (or "absolute alcohol"), but they are used only for scientific or industrial purposes. 100% ethanol does not stay 100% for very long, because it is hygroscopic and absorbs water out of the atmosphere.

2016-03-17 02:14:08 · answer #2 · answered by Anonymous · 0 0

The best method I have found for separating the two, depending on the type of alcohol... we'll use ethanol for this example, is to perform fractional distillation with a 1 foot reflux column with water ring at the bottom, then standard condenser leading to a drying agent, such as potassium carbonate, then into a collection vessel. You can keep the temperature at 78C longer and any water that comes over is absorbed and ionized by the potassium carbonate. This water if it does flow into collection vessel will be soo polarized that it will not remix with the alcohol and can be poured or pipetted out. This method has been yielding 99.5+% (199 proof) purity in high humidity conditions all summer long.

Afterwards I store the bottles in the freezer with a dessicant pack glued inside the lid of the brown glass bottles to ensure it remains dry.

2006-08-24 17:27:29 · answer #3 · answered by piercesk1 4 · 1 0

Alan Turing is correct if you talking about ethanol. The best separation you can get by distillation alone is a solution of about 90% alcohol. I've not heard about the freezing, but alcohol freezes as well, I'm not sure what kind of separation you'd get but I'd guess if that worked well it would be used industrially.

Liquid/liquid extraction doesn't work to well for alcohol either because the alcohol will allow water to be dissolved in liquid that otherwise it would not thats why the gas treatments use alcohol to get rid of water in your gas tank, it disolves into the gas.

Normally to obtain pure alcohol a molecular sieve is used.

2006-08-24 14:50:24 · answer #4 · answered by Roadkill 6 · 1 0

You really cannot do a good separation of alcohol and water by boiling. The reason is that they will both boil off at an azeotropic temperature, which will be between the temperature of the two boiling points. And the vapors that boil off will consist of a fixed percentage of both liquids. This is why moon shine is not pure alcohol, for example.

The freeze method will create a better separation.

2006-08-24 13:36:39 · answer #5 · answered by Alan Turing 5 · 1 1

You can also separate them using thier boiling points. Alcohol boils at abou 80 C and water at 100 C. provided you have a way to collect them again.

2006-08-24 12:41:17 · answer #6 · answered by glazeddonut27 3 · 0 1

By fractional distillation,water boil at 100 C but alcohol boil at 87 C

2006-08-24 13:02:08 · answer #7 · answered by fatma m 2 · 0 1

fractional distillation, alcohol has lower boiling point than water, water at 100 degree Celcius while acohol about 85 - 88 degree celcius.

2006-08-24 16:15:45 · answer #8 · answered by ofalsa 2 · 0 1

put it in the freeser. water will become solid before the alcohol. then you can keep both sperate. Or boil the water and the boiling point of alchol is lower than watter so the alcohol will evaporate

2006-08-24 12:41:42 · answer #9 · answered by Anonymous · 0 1

Heat them. The alcohol has a lower boiling point and will boil off first.

2006-08-24 12:40:49 · answer #10 · answered by ELA 2 · 0 1

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