Production of activated carbon fibers from acid contacted polybe

Details Production of activated carbon fibers from acid contacted polybe Production of activated carbon fibers from acid contacted polybe

1983-05-06

1984-07-17

Konopka, P. E.

Catalyst, solid sorbent, or support therefor: product or process

Solid sorbent

Free carbon containing

264 292, 4234474, 502425, 502434, C01B 3112, C01B 3110, D01F 912

Patent

active

044607083

ABSTRACT:
An improved process which makes possible the expeditious formation of activated carbon fibers having high absorptivity characteristics is provided. A polybenzimidazole fibrous material is contacted with a solution of an acid (e.g. sulfuric acid) so as to form a polybenzimidazonium salt (as described), and the resulting fibrous material is preoxidized, carbonized, and activated under the conditions defined which have been found to reliably and expeditiously yield the desired product. The resulting activated carbon fiber product exhibits a dynamic weight absorptivity of at least 100 mg. of CCl.sub.4 per gram, and particularly is suited for the formation of protective garments having highly satisfactory sorptive characteristics.

REFERENCES:
patent: 3903248 (1975-09-01), Kalnin et al.
patent: 4073869 (1978-02-01), Kalnin
patent: 4401588 (1983-08-01), Turner

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