Process for producing optically isotropic pitch

Details Process for producing optically isotropic pitch Process for producing optically isotropic pitch

1992-03-25

1995-02-07

Myers, Helane

Mineral oils: processes and products

Asphalts, tars, pitches and resins; making, treating and...

Chemical modification of asphalt, tar, pitch or resin

208 3, 208 6, 208 39, C10L 304

Patent

active

053873335

ABSTRACT:
An optically isotropic pitch can be obtained by a two-stage heat-treatment which combines a heat treatment with air-blowing under normal pressure with a heat treatment with air-blowing under a reduced pressure. Such a pitch is suitable for using as a raw material for producing carbon fibers or activated fibers.

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Derwent Abstract of Japanese Patent Publication Sho 63-156886 Jun. 29, 1988.
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Patent Abstracts of Japan, vol. 10, No. 178: Japanese Patent Appln. 61-28020.

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