Cellulosic ion-exchange medium, and method of making and using t

Details Cellulosic ion-exchange medium, and method of making and using t Cellulosic ion-exchange medium, and method of making and using t

1996-04-26

1999-05-25

Lee, Howard C.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carbohydrates or derivatives

536 58, 210660, 210681, 423 1, C08B 500, C08B 514, B01D 1500, B01J 3904

Patent

active

059070374

ABSTRACT:
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.

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Gujral et al., The Fourth North American Symposium on Society and Resource Management, Book of Abstracts, 1991, 121-Regional Forestry, May 17, 1992.
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