Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Rod – strand – filament or fiber
Reexamination Certificate
2005-04-05
2005-04-05
Dye, Rena (Department: 1774)
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Rod, strand, filament or fiber
C428S364000, C428S394000, C428S917000, C008S115510, C008S116100, C008S181000, C008S196000
Reexamination Certificate
active
06875508
ABSTRACT:
A fiber capable of forming a metal chelate and a process for producing the same are disclosed, wherein the fiber is characterized in that at least one metal chelate-forming compound selected from the group consisting of aminodicarboxylic acids, aminocarboxylic acids, thiocarboxylic acids and phosphoric acid, which are reactive with a glycidyl group, is bonded to a molecule of a natural fiber or regenerated fiber through a crosslinkable compound having a reactive double bond and a glycidyl group in its molecule. There are also disclosed a method of capturing metal ions using the fiber and a metal chelate fiber which can effectively make use of the characteristics of the metals and can be easily discarded or incinerated.
REFERENCES:
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Waly et al., Synthesis and Characterization of Cellulose Ion Exchanger; Pilot Scale and Utilization in Dye-Heavy Metal Removal, J. Appl. Polym. Sci., 68, No. 13: 2151-2157 (May 27, 1998), The Institute of Paper Science and Technology, Atlanta, GA, US.
Doi Takao
Horiuchi Shiho
Ito Osamu
Nambu Nobuyoshi
Chelest Corporation
Chubu Chelest Co., Ltd.
Dye Rena
Gray J. M.
Smith Patent Office
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