Method for decaffeinating coffee with a supercritical fluid

Details Method for decaffeinating coffee with a supercritical fluid Method for decaffeinating coffee with a supercritical fluid

A - Human Necessities

23

F

99/80

A23F 5/20 (2006.01) C07D 473/12 (2006.01)

Patent

CA 1304978

Abstract of the Disclosure METHOD FOR DECAFFEINATING COFFEE WITH A SUPERCRITICAL FLUID A method of extracting caffeine from green coffee beans whereby an essentially caffeine-free supercritical fluid is continuously fed to one end of an extraction vessel containing green coffee beans and caffeine-laden supercritical fluid is continuously withdrawn from the opposite end. A portion of decaffeinated beans is periodically discharged while a fresh portion of undecaffeinated beans is essentially simultaneously charged to the extraction vessel. The caffeine-laden supercritical fluid is fed to a countercurrent water absorber. Supercritical carbon dioxide is the preferred super- critical fluid. The method of the present invention is more efficient than batch processes and produces an improved decaffeinated coffee.

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