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1. 发明授权

US06440222B1 Sugar beet membrane filtration process 有权
标题翻译：甜菜膜过滤过程
公开(公告)号：US06440222B1
公开(公告)日：2002-08-27
申请号：US09618831
申请日：2000-07-18
申请人： Michael Donovan , Robert P. Jansen , Richard C. Reisig , Marc Hlavacek , Gordon Walker , John C. Williams
发明人： Michael Donovan , Robert P. Jansen , Richard C. Reisig , Marc Hlavacek , Gordon Walker , John C. Williams
IPC分类号： C13D108
CPC分类号： B01D61/142 , B01D61/16 , B01D2311/04 , C13B10/00 , C13B20/00 , C13B20/165 , B01D2311/103 , B01D2311/246 , B01D2311/2623 , B01D2311/268
摘要： A process for producing sugar from beets includes the step of filtering a sucrose-containing feed juice, which has been obtained from macerated sugar beets, through a first ultrafiltration membrane that has a first molecular weight cutoff. This ultrafiltration step produces a first ultrafiltration permeate and a first ultrafiltration retentate. The first ultrafiltration permeate is filtered through a second ultrafiltration membrane that has a second molecular weight cutoff that is lower than the first molecular weight cutoff. This second ultrafiltration step produces a second ultrafiltration permeate and a second ultrafiltration retentate. The second ultrafiltration permeate is nanofiltered through a nanofiltration membrane, thereby producing a nanofiltration permeate and a nanofiltration retentate. The nanofiltration retentate has a higher concentration of sucrose on a dry solids basis than the feed juice in step (a), and can be used in evaporation and crystallization operations to produce crystals of white sugar. The process can optionally include ion exchange and/or electrodialysis purification steps, prior to or after the nanofiltration step. Recycle syrups can be treated with enzyme or a chromatographic separator to remove raffinose.
摘要翻译：从甜菜制备糖的方法包括通过具有第一分子量截留值的第一超滤膜过滤从浸出的甜菜获得的含蔗糖的进料汁的步骤。该超滤步骤产生第一超滤渗透物和第一超滤滞留物。第一超滤渗透物通过具有低于第一分子量截止值的第二分子量截止值的第二超滤膜过滤。该第二超滤步骤产生第二超滤渗透物和第二超滤滞留物。第二超滤渗透物通过纳滤膜进行纳滤，从而产生纳滤膜渗透物和纳滤膜渗余物。纳米过滤滞留物在干固体基础上具有比步骤（a）中的进料汁更高的蔗糖浓度，并且可用于蒸发和结晶操作以产生白糖晶体。该方法可任选地包括在纳滤过程之前或之后的离子交换和/或电渗析纯化步骤。可以用酶或色谱分离器处理回收糖浆以除去棉子糖。

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