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Hi my name is XXXXX XXXXX while I am not a wine maker(though I do enjoy wines) I have a strong background in chemistry and biochemistry and I will assist you today.Keeping in mind that distillation(a main way to eliminate alcohol from fluids) is illegal there are a few ways to try to coax the alcohol out. Some of these may undoubtedly change the flavor and characteristics of the wine because the flavor actually comes as part of the fermentation process with all the components of the wine itself.Ethyl alcohol boils at 78.5 Celsius(173 degrees F) and water boils at 212*F. Ethyl alcohol freezes at roughly -180 degrees Fahrenheit, water freezes at 3 , so the easiest way to eliminate this is the heat the wine to roughly 78.5 degrees, or 175 to be sure and keep it there while stiring - the amount of time is going to dependent on the volume of the wine and the actual alcohol content.
Sorry i meant to say water freezes at 32* degrees Fahrenheit, not 3.
Keep in mind there is a reason certain spirits including wines and beers are best kept at a certain temperature - unique to the spirit. Exposure to a different environment for any length of time might change or ruin the the characteristics and flavors of the wine.
You could also gradually freeze the wine to pull the alcohol off the problem is wine also has sugars and other ingredients(compared to pure vodka for example) so there is a slight difference with the water content and the other ingredients that make the wines so complex. You would have to make sure you can constantly stir the wine as it cools, then cool it more and more stirring it each time so everything becomes an evenly cooled mixture. When things freeze they typically expand and there is a fairly good chance if its not very smooth and gradual the container could break from the liquid expansion.
If you are looking to get the health benefits of wines but without the alcohol, you can get the same amounts of flavonoids and other polyphenolic antioxidant benefits along with vitamins and minerals from drinking grape juices, that come in many different varieties. You can also make your own with a juicer and mix in other "superfood" berries like raspberries, blueberries, and blackberries, if these suit your palette.