Over at Wine Enthusiast, they have a selection of best non-alcoholic wines based on customer reviews, plus a quick synopsis of the category which includes a blurb on how they do it:
"...the two most common ways are vacuum distillation and reverse osmosis. In vacuum distillation, the beverage is heated to the point where the alcohol evaporates. During the practice of reverse osmosis, wine is run “through a filter, and the filter separates the alcohol based on the size of the molecule,” Terry Donnelly, chairman and CEO of Hill Street Beverage Company Inc. told Wine Enthusiast. “Alcohol is a bigger molecule than water, so you can literally run it through like a microscopic strainer and filter the alcohol off.”
You can read the whole thing here. Looking to nab some juice here in Vancouver? Check out Sansorium, AFBev, and Drive Canteen!