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1. 发明授权

US5792315A Purifying aqueous effluent from a pulp mill using electro chemical membrane device 失效
标题翻译：使用电化学膜装置从纸浆厂净化含水流出物
公开(公告)号：US5792315A
公开(公告)日：1998-08-11
申请号：US602556
申请日：1996-02-20
申请人： Johan Landfors , Christin Persson
发明人： Johan Landfors , Christin Persson
IPC分类号： B01D61/44 , C02F1/469 , D21C11/00
CPC分类号： D21C11/0021 , B01D61/44 , C02F1/469 , D21C11/0042 , C02F1/4693 , C02F2201/46115 , Y10S162/08
摘要： This invention is related to a process for producing pulp from a cellulosic starting material, wherein an aqueous process effluent is purified from metal impurity cations. This process comprises that the effluent is purified by an electro-chemical membrane treatment in an electrochemical membrane device comprising a unit cell through which an electric current is passed between an anode side and a cathode side of said cell, said cell comprising at least two ion permeable membranes forming between them at least one compartment, said effluent being fed into an effluent feed compartment in said cell, in which the effluent is purified by removing with the electric current metal impurity cations from the effluent through a cation selective membrane on the cathode side of said compartment, and withdrawing from said compartment the purified effluent. The purified effluent may be recirculated to the pulp mill process, e.g. as washing water.
摘要翻译：本发明涉及从纤维素原料生产纸浆的方法，其中从金属杂质阳离子纯化含水工艺流出物。该方法包括在电化学膜装置中通过电化学膜处理净化流出物，所述电化学膜装置包括在所述电池的阳极侧和阴极侧之间通过电流的单元电池，所述电池包含至少两个离子在它们之间形成至少一个隔室的渗透膜，所述流出物被进料到所述池中的流出物进料室中，其中流出物通过从流出物中通过阴极侧的阳离子选择性膜从电流金属杂质阳离子去除而被纯化并且从所述隔室抽出纯化的流出物。纯化的流出物可以再循环到纸浆厂工艺，例如作为洗涤水。

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