Manufacture of activated carbon fiber

Details Manufacture of activated carbon fiber Manufacture of activated carbon fiber

1994-10-20

1996-05-28

Edwards, N.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Rod, strand, filament or fiber

428408, 264 292, D02G 300

Patent

active

055210082

ABSTRACT:
Activated carbon fiber is made by pre-treating a carbonized fibrous material, preferably a carbonized cellulose fiber, with a solution of nitrogen-containing compound, comprising at least one of the following substances: urea, ammonium carbonate, ammonium bicarbonate, ammonium acetate, and other organic salts of ammonia such as formate, carbamate, citrate and oxylate, and activating the pre-treated carbonized material at 800.degree. to 1200.degree. C. in an atmosphere comprising steam and/or carbon dioxide until a high degree of activation is produced. The activated carbon fiber material is amphoteric, wherein both acidic and basic functional groups are present on its surface. The resulting material is suitable for removing organic impurities, cations and anions from water and other fluids.

REFERENCES:
patent: 3639140 (1972-02-01), Miyamichi
patent: 3639953 (1972-02-01), Kimura
patent: 3661616 (1972-05-01), Miyamichi
patent: 3969268 (1976-07-01), Fukuda et al.
patent: 4409125 (1983-10-01), Nishino et al.
patent: 4789509 (1988-12-01), Ikeda et al.
patent: 4923692 (1990-05-01), Nakagoshi et al.

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