Concentrating Extract in a Rotovap

Once the winterized material has been filtered separating out unwanted waxes, fats and lipids, the remaining extract can be concentrated by removing most of the remaining solvent. While using a rotary evaporator to concentrate the extract, it is essential to maintain the proper vacuum depth and flow rate to minimize process time and prevent sample loss through bumping or foaming. If the vacuum is too deep, product will evaporate with the solvent and bumping/over-boiling could be triggered. This slows down your production and costs you money. Vacuum that is too deep also reduces solvent recovery, which drives up operating costs. Using a variable speed vacuum pump with control will automatically maintain the right amount of vacuum depth to optimize the process, prevent loss of concentrated extract, and help maximize solvent recovery.