Skip to content

Supercritical CO2 fluid extraction of caffeine

Caffeine a methylxanthine alkaloid. Chemical Formula C8H10N4O2, soluble in water.White crystalline powder, odorless, bitter and weakly alkaline. On October 27, 2017, the WHO Agency for International Cancer Research (IARC) released a preliminary list of carcinogens, with caffeine in the list of Category 3 carcinogens.

Supercritical CO2 fluid extraction of caffeine
Supercritical CO2 fluid extraction of caffeine

Caffeine is a central nervous system stimulant which can refresh and relieve fatigue and keep the body in good condition. However, high-dose intake can lead to caffeine poisoning, the body produces a series of adverse reactions.

First, coffee beans are pre-treated, mechanically washed coffee beans to remove dust and impurities; followed by steam and water pre-soaking, to increase its moisture content of 30% -50%; then extracted with a supercritical extraction equipment will be Pre-soaked coffee beans into the extraction tank, continue to the tank into the CO2, caffeine gradually extracted;

The second, the caffeine-containing CO2 was sent to the cleaning tank of the supercritical extraction equipment, caffeine into the water phase last, and then caffeine in the aqueous phase to be recovered by distillation, C02 is recycled; 10 hours, SFE The content of caffeine in the treated coffee beans decreased from 0.7-3% to 0.02%.

Leave a Reply

Your email address will not be published.