Within the evaporation body there is a vertical internal condenser positioned central, parallel, and close to, the full length of the cylindrical evaporation surface, providing a short path for evaporated vapor molecules traveling from the heated surface to the condenser surface. For cannabinoid distillation, the internal condenser fluid must be kept elevated (~70°C) to prevent high viscosity or freeze-up of the condensed THC, CBD, and other component vapors.
Due to the optimized, continuous Pope equipment design, this all happens with high evaporation efficiency and within a number of seconds, (instead of hours of high-temperature exposure in batch type “short-paths”), and under vacuum-lowered temperatures, thus minimizing any possibility of product degradation.
Prior to the cannabinoid distillation pass through the wiped film still, there is a first pass in which terpenes and any other lighter end components are removed by distillation from the feed material and collected as a distillate. The terpenes and other light components can be condensed in the internal condenser and an optional external condenser. The residue from this pass is collected in a different flask or vessel until all the feed material has been depleted. The residue contains the cannabinoids and heavy compounds and this fraction will then be fed through the still again as a second pass as has been previously described. This first pass boosts the cannabinoid percentage and decreases the volatility of the feed material such that the cannabinoid distillation pass will behave better, resulting in optimized purity and yield.