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2. 发明公开

EP0424579A1 Decaffeination of coffee 失效
标题翻译： KAFFEE-Entkoffeinierung。
公开(公告)号：EP0424579A1
公开(公告)日：1991-05-02
申请号：EP89310933.0
申请日：1989-10-24
申请人： KRAFT GENERAL FOODS, INC.
发明人： Katz, Saul Norman , Spence, Jean Ellen , O'Brien, Michael J. , Skiff, Ronald H. , Vogel, Gerald J. , Prasad, Ravi
IPC分类号： A23F5/20 , C07D473/12
CPC分类号： A23F5/206
摘要： 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to one end of an extraction vessel containing green coffee beans and caffeine-laden supercritical fluid is continuously withdrawn from the opposite end.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.
摘要翻译：从生咖啡豆中提取咖啡因的方法，其中连续将基本上不含咖啡因的超临界流体输送到含有生咖啡豆和含咖啡因的超临界流体的提取容器的一端，从另一端连续取出。一部分脱咖啡因的豆被定期排出，而新鲜部分的未脱咖啡因的豆基本上同时装入提取容器。将含咖啡因的超临界流体供给到逆流吸水剂中。超临界二氧化碳是优选的超临界流体。通过反渗透浓缩来自吸收器的富含咖啡因的水，以获得97％或更高纯度的咖啡因和含有酸性非咖啡因固体的渗透物，其加入该方法中以提高产量并提高提取速率。本发明的方法比分批方法更有效，并产生改进的脱咖啡因咖啡。

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