The recovery of caffeine by extraction with supercritical carbon dioxide is extremely selective. The typical taste of coffee remains untouched. The used carbon dioxide can be taken from air or fermentation processes and, hence, it does not disturb the global carbon dioxide balance. Moreover, the extraction with supercritical carbon dioxide replaces the solvent extraction processes with chlorinated hydrocarbons and contributes this way to reduce the emission of ozone killers.

GEA Messo PT has been partner in the development of these technologies with the recovery of caffeine in highest quality grades. The essentials of all the alternates in these recovery processes are to avoid the formation of colours hindering the production of a white product. This is attained by the avoidance of elevated temperatures and/or entrance of oxygen to the product solutions.

GEA Messo PT has collected experiences and performed plant supplies for the water-based CO₂ recovery as well as the recovery via activated carbon adsorption. The photo shows the reverse osmosis rack used for a caffeine pilot plant arrangement.