发明授权
US5907037A Cellulosic ion-exchange medium, and method of making and using the same
失效
纤维素离子交换介质及其制造和使用方法
- 专利标题： Cellulosic ion-exchange medium, and method of making and using the same
- 专利标题（中）： 纤维素离子交换介质及其制造和使用方法
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申请号： US638299申请日： 1996-04-26
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公开(公告)号： US5907037A公开(公告)日： 1999-05-25
- 发明人: Bir Singh Gujral , Harpreet S. Chadha
- 申请人： Bir Singh Gujral , Harpreet S. Chadha
- 申请人地址： NC Raleigh
- 专利权人： Central Technology, Inc.
- 当前专利权人： Central Technology, Inc.
- 当前专利权人地址： NC Raleigh
- 主分类号： B01D15/04
- IPC分类号： B01D15/04 ; B01J39/22 ; C02F1/42 ; C08B15/00 ; D21C9/00 ; C08B5/00 ; B01D15/00 ; B01J39/04 ; C08B5/14
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.
公开/授权文献
- US5120542A Pesticide compositions and method 公开/授权日：1992-06-09