I have used reflux extractions with Everclear for years, using a 30 gal metal trash can, and often reclaim 50% or more of the alcohol. I set the can on 3 concrete blocks with a 200 watt incandescent bulb under the bottom for heat. The liquid is in a stainless bowl sitting in the bottom of the can. A glass 10" Diam. bowl is suspended by three copper wires in the center from the can's lip, several inches below the top of the can. The lid is inverted, with any fittings that puncture the lid sealed previously with silicone caulking on the inside of the lid, which is the outside for our purposes. The gap between the lid and the can is sealed with a latex rubber strap like that used in physical therapy. The top is lined with paper towels or a dish towel and kept damp with water. The alcohol evaporates from the bowl, condenses on the lid, dripping from the middle into the suspended bowl. Checking every 12 hours or so, the glass bowl can be removed and emptied periodically. The light source can be adjusted by distance to adjust heating, it is hard to over heat this set-up. This works best at 80°F ambient or lower. An alcohol extraction can be done this way as well, making a cone of screen door screen, lining it with paper towels, and filling it with weed. place the filled cone where the glass bowl would go. Do this first then remove the alcohol. The result is a fine oil for cooking. I use it at 20 doses per gram, many use it at 40 or 60 doses per gram. After forty years of this extraction, it was nice to see butane come along. I'm curious about the residual left from BHO extraction, and have several ounces to play with. We'll see.
