公开(公告)号：US3751266A

公开(公告)日：1973-08-07

申请号：US3751266D

申请日：1970-07-22

申请人： KIRIN BREWERY ,  KIRIN BREWERY

发明人： KUROIWA Y ,  UEHARA H ,  KOKUBO E ,  ARAMAKI K

IPC分类号： C12C7/00 ,  C12C3/12 ,  C12C9/02

CPC分类号： C12C3/12

摘要： To an aqueous alkali extract containing iso- Alpha -acids, prepared by subjecting hops to extraction of Alpha -acids therefrom and isomerization thereof in an aqueous alkali, an acid is added to adjust the pH value of the extract to a value of from 4.0 to 5.7 thereby to cause precipitation of coexisting impurity materials existing in dissolved state, whereas the iso- Alpha acids remaining in dissolved state, and the resulting precipitate is removed, whereupon an isomerized hop extract of high isoAlpha -acid utilization is produced without any harmful organic solvent.

摘要翻译： 向含有异α-酸的含水碱性提取物中，通过使啤酒花从其中提取α-酸及其在碱性水溶液中异构化制备，加入酸以将提取物的pH值调节至4.0至 5.7，从而使存在于溶解状态的共存杂质沉淀，而异α-酸保持溶解状态，并将所得沉淀物除去，由此产生具有高异α-酸 - 酸的异构化啤酒花提取物，无任何 有害有机溶剂。