Patent ID: 6228343
Filing Date: 2001-05-08
Classification: C10C,D01F,H01M,Y02E

Abstract:
A method for preparing an activated carbon fiber comprising preparing a synthetic pitch having a softening point of 200.degree. C. or less by reacting a member selected from the group consisting of a conjugated polycyclic hydrocarbon containing a low molecular weight alkyl group or a material containing said hydrocarbon in the presence of hydroflouric acid/boron triflouride, treating said synthetic pitch by passing an oxidizing gas through said synthetic pitch at elevated temperatures to form a modified optically isotropic pitch, spinning the modified optically isotropic pitch into fibers, stabilizing said fibers and subjecting the stabilized fibers to activation treatment, said activation treatment comprising passing a gas stream over the fibers, wherein the gas stream comprises at least one of steam, carbon dioxide or oxygen at a temperature of from about 700.degree. C. to about 1000.degree. C.