A - Human Necessities – 23 – F
Patent
A - Human Necessities
23
F
99/80
A23F 5/16 (2006.01) A23F 5/20 (2006.01)
Patent
CA 2001125
METHOD FOR DECAFFEINATING COFFEE WITH A SUPERCRITICAL FLUID ABSTRACT OF THE DISCLOSURE 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to one end of an extraction vessel containing green coffee beans and caffeine-laden supercritical fluid is continuously withdrawn from the opposite end.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 supercritical fluid. The rich caffeine laden water from the absorber is concentrated by reverse osmosis to obtain caffeine of 97% or greater purity and a permeate containing acidic non-caffeine solids which are added to the process to improve yield and increase the rate of extraction. The method of the present invention is more efficient than batch processes and produces an improved decaffeinated coffee. LPATCASE:80
Katz Saul N.
O'brien Michael J.
Prasad Ravi
Skiff Ronald H.
Spence Jean E.
General Foods Corporation
Katz Saul N.
Mcfadden Fincham
O'brien Michael J.
Prasad Ravi
LandOfFree
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