Ashland Oil, Inc.

William R Sawran

Charles R Gannon

Frank H Turrill

John W Newman

Norman W Hall

Clifford Ward

Disclosed herein is an improved pitch for making readily stabilizable, substantially nonmesophasic carbon fibers. The pitch has a softening point of about 250.degree. C.(480.degree. F.) or above and is produced from an unoxidized thermal petroleum pitch by selectively reducing or eliminating a portion of the low molecular weight materials in a very short period of time so that the tendency to produce mesophase pitch is eliminated or reduced and so that the chemical integrity of the components of the higher molecular weight fractions is preserved as much as possible. Also disclosed is a method of producing carbon fibers therefrom and rovings or mats from such fibers.

Process for the manufacture of carbon fibers and feedstock therefor

Disclosed herein is an improved pitch for making readily stabilizable, substantially nonmesophasic carbon fibers. The pitch has a softening point of about 250.degree. C. (480.degree. F.) or above and is produced from an unoxidized thermal petroleum pitch by selectively reducing or eliminating a portion of the low molecular weight materials in a very short period of time so that the tendency to produce mesophase pitch is eliminated or reduced and so that the chemical integrity of the components of the higher molecular weight fractions is preserved as much as possible. Also disclosed is a method of producing carbon fibers therefrom and rovings or mats from such fibers.

Process for the manufacture of carbon fibers

Disclosed is a carbon extrusion oil for preparing carbon and graphite electrodes. The composition comprises a mixture of straight-chain paraffin hydrocarbons and cylinder stock derived from a naphthenic type of crude oil. This invention relates to a method for producing extruded carbon or graphite bodies and to a composition for use therein.

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Ashland, KY, United States of America

William R Sawran