I have a problem with boiling stones during fractional distillation. I distill ethanol from the drink I bought, and when I used a stirrer and cooking stones with it, it exploded very hard, "shooting". I had to stop the distillation because the flask also moved on the hot plate. It crashed a lot from a place where there was a large cluster of small stones 1 mm or smaller in size, and among them were larger pieces. I threw away the stones and used a stirrer. Unfortunately the boiling is smaller and I have to raise the temperature. How big should I use cooking stones and how much?
Thank you very much. Lukáš S.