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公开(公告)号：US5089280A
公开(公告)日：1992-02-18
申请号：US63372
申请日：1987-06-18
摘要： A simple, reliable process for decaffeinating green coffee beans to a high degree while avoiding denaturation of the green coffee beans includes wetting the green coffee beans to a high water content of 35-50%-wt.; compressing the beans in a pressure chamber for a period of a few minutes to several hours in an atmosphere comprised of a supercritical fluid which is a gas at STP, at a temperature ranging from 20.degree. to 80.degree. C. under a critical pressure ranging from 75 to 300 bar; decompressing the wetted beans from critical pressure p.sub.c to a pressure p for which p.sub.c .ltoreq.p.ltoreq.1 bar abruptly or in the space of a few minutes, while avoiding freezing the green coffee beans; washing with water or with the supercritical fluid for selective extraction of the caffeine; repeating the process one or more times; centrifuging; drying; and roasting the beans. Further, caffeine is recovered in a known manner from the washing medium.
摘要翻译： 一个简单，可靠的方法，以高度脱咖啡因的绿咖啡豆，同时避免绿色咖啡豆的变性包括将绿色咖啡豆润湿至35-50％重量级的高含水量; 在压力室内压缩豆类在几分钟至数小时的时间内，在由STP中的气体制成的超临界流体气氛中，温度为20℃至80℃，临界压力范围为 75到300巴; 将湿豆从临界压力pc减压到突然间或几分钟的空间中的p p的压力p，同时避免冷冻生咖啡豆; 用水或与超临界流体一起洗涤以选择性地提取咖啡因; 重复一次或多次; 离心; 烘干; 并烘烤豆类。 此外，咖啡因以已知的方式从洗涤介质中回收。
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公开(公告)号：US5114728A
公开(公告)日：1992-05-19
申请号：US757571
申请日：1991-09-11
摘要： A simple, reliable process for decaffeinating green coffee beans to a high degree while avoiding denaturation of the green coffee beans includes wetting the green coffee beans to a high water content of 35-50%-wt.; compressing the beans in a pressure chamber for a period of a few minutes to several hours in an atmosphere comprised of a supercritical fluid which is a gas at STP, at a temperature ranging from 20.degree. to 80.degree. C. under a critical pressure ranging from 75 to 300 bar; decompressing the wetted beans from critical pressure p.sub.c to a pressure p for which p.sub.c p.gtoreq.p.gtoreq.1 bar abruptly or in the space of a few minutes, while avoiding freezing the green coffee beans; washing with water or with the supercritical fluid for selective extraction of the caffeine; repeating the process one or more times; centrifuging; drying; and roasting the beans. Further, caffeine is recovered in a known manner from the washing medium.
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