公开(公告)号：US5907037A

公开(公告)日：1999-05-25

申请号：US638299

申请日：1996-04-26

申请人： Bir Singh Gujral ,  Harpreet S. Chadha

发明人： Bir Singh Gujral ,  Harpreet S. Chadha

IPC分类号： B01D15/04 ,  B01J39/22 ,  C02F1/42 ,  C08B15/00 ,  D21C9/00 ,  C08B5/00 ,  B01D15/00 ,  B01J39/04 ,  C08B5/14

CPC分类号： C08B15/00 ,  B01J39/22 ,  C02F1/42 ,  D21C9/001

摘要： A cellulosic cationic ion-exchange composition is formed by sulfonation of activated cellulose having of high surface area characteristics, using an acid such as concentrated H.sub.2 SO.sub.4. The sulfonated material is convertible into different forms, viz., H-form, Na-form, K-form, NH.sub.4.sup.+ form, Ba-form, Ca-form, and Cu-form by appropriate reaction. The cation-exchanger has been found useful to treat industrial effluents for the removal of heavy metals, to achieve recovery of precious metals, to carry out water-softening, and the like.

摘要翻译： 纤维素阳离子交换组合物通过磺酸化具有高表面积特性的活化纤维素，使用酸如浓H 2 SO 4形成。 磺化材料通过适当的反应可转化为不同形式，即H型，Na型，K型，NH4 +型，Ba型，Ca型和Cu型。 已经发现阳离子交换剂可用于处理工业废水以去除重金属，实现贵金属的回收，进行水软化等。