DENVER – The opening months of Colorado's first-in-the-nation recreational marijuana industry have seen a rise in fiery explosions and injuries as pot users try to make the drug's intoxicating oil in crude home-based laboratories.A quick Wiki search shows that hash oil is easily made from marijuana gleanings (stems, leaves, etc) by using a volatile solvent, like butaine.
The most common form of hash oil is made by passing liquid butane through a tube filled with cannabis plant matter. The low temperature of the liquid butane crystallizes the cannabis resins. As the butane passes through the tube the crystallized resins are trapped in the liquid butane. As the solvent (butane + resins) exits the tube it is caught in a glass container. Butane is a volatile molecule and boils at −1°C., leaving behind the crystallized resins only, which are collected from the glass container.Okay, then! Butane, marijuana, and stoners all in the same room, trying to make a more potent product. What could possibly go wrong?