Process for production of activated carbon fibers

Details Process for production of activated carbon fibers Process for production of activated carbon fibers

1979-04-23

1981-08-25

Kendell, Lorraine T.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252421, 252422, 252425, 264 292, 4234472, 4234474, 4234476, 428367, B01J 3700, D01F 912, D02G 300

Patent

active

042858313

ABSTRACT:
A process for producing activated carbon fibers of high adsorption capacity which comprises oxidizing an acrylonitrile based fiber, wherein the acrylonitrile based fiber is a homopolymer of acrylonitrile, a copolymer containing about 60% by weight or more of acrylonitrile, or a mixture of polymers such that about 60% by weight or more of acrylonitrile is present in the mixture, in an oxidizing atmosphere at a temperature of about 200.degree. C. to about 300.degree. C. while applying a tension to the fiber until the amount of bonded oxygen reaches about 65% to about 95% of the saturated amount of bonded oxygen of the fiber, wherein the tension applied is such that the shrinkage of the fiber during oxidation reaches about 70% to about 90% of the degree of free shrinkage at the same temperature, and then activating the fiber.

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Lin et al., "The Preparation and Properties of Activated Carbon Fibers Derived from Phenolic Precursor" Applied Polymer Symposium No. 21, 143-152 (1973).

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