A - Human Necessities – 23 – F
Patent
A - Human Necessities
23
F
99/80, 99/82
A23F 3/38 (2006.01) A23F 5/20 (2006.01) A23F 5/22 (2006.01)
Patent
CA 1177315
ABSTRACT The object of the invention 3 to provide an improved method for removing caffeine from aqueous solutions such as coffee and tea extracts. Decaffeination with liquid, water-immiscible, caffeine-specific solvents having relatively low partition coefficients has in the past required very high solvent-to-extract ratios and has resulted in the loss of an undesirably high level of non-caffeine soluble solids. The process disclosed herein decaffeinates an aqueous caffeine feed solution by contacting it with a multi-phase extractant which comprises a continuous phase of a liquid, water-immiscible, caffeine specific solvent and discontinuous aqueous phase dispersed therein. The caffeine is selectively extracted from the aqueous feed solution, leaving the solubles necessary for a good tasting beverage due to the high combined selectivity of the extractant phases. Very low solvent-to-extract ratios are possible because the multi-phase extractant has a much improved partition coefficient as compared to the water-immiscible solvent.
384984
Katz Saul N.
Skiff Ronald H.
General Foods Corporation
Mcfadden Fincham
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