FREMGANGSMAATE FOR EKSTRAHERING AV KOFFEIN FRA RAAKAFFEBOENNER

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to one end of an extraction vessel containing green coffee beans and caffeine-laden supercritical fluid is continuously withdrawn from the opposite end.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 d...

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Bibliographic Details
Main Author KATZ, SAUL NORMAN
Format Patent
LanguageNorwegian
Published 11.09.1989
Edition4
Subjects
COFFEE
FOODS OR FOODSTUFFS
HUMAN NECESSITIES
MANUFACTURE, PREPARATION, OR INFUSION THEREOF
TEA
THEIR SUBSTITUTES
THEIR TREATMENT, NOT COVERED BY OTHER CLASSES
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Summary: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to one end of an extraction vessel containing green coffee beans and caffeine-laden supercritical fluid is continuously withdrawn from the opposite end.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 method of the present invention is more efficient than batch processes and produces an improved decaffeinated coffee.
Bibliography:Application Number: NO19880005793