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US 4,767,634 AGranted
Coffee decaffeination with caffeic acid
AssigneeGeneral Foods Corporation
InventorsWilliam W. Kaleda, Fouad Z. Saleeb, Bary L. Zeller
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Abstract
A method of decaffeination wherein a caffeine-containing coffee extract solution is contacted with caffeic acid in the presence of water. The caffeine and the caffeic acid form an insoluble caffeine/caffeic acid complex wherein the complex is separated from the coffee extract solution.
Claims21
A method of decaffeination which comprises:
- (a) contacting a caffeine-containing coffee extract solution with caffeic acid in the presence of water wherein the caffeine and caffeic acid form an insoluble caffeine/caffeic acid complex;
- (b) growing crystals of the insoluble caffeic acid/caffeine complex which can be separated from the liquid;
- and
- (c) separating the caffeine/caffeic acid complex from the coffee extract solution.
1 more element
Dependencies are inferred from the claim text.