Process for preparing mesophase pitches

Details Process for preparing mesophase pitches Process for preparing mesophase pitches

1987-05-11

1988-12-06

Sneed, H. M. S.

Mineral oils: processes and products

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

208 40, 208 41, 208 44, 208 22, 4234474, C10C 302, C10C 300

Patent

active

047894563

ABSTRACT:
A process for an efficient preparation of a mesophase pitch is disclosed. The process is suitable for the production of high performance carbon fibers, from a coal tar or a petroleum residual oil. More particularly, the present invention relates to a process for the preparation of a homogeneous mesophase pitch which comprises a continuous thermal treatment of a heavy oil or a pitch which does not contain quinoline insoluble fractions, in the presence or absence of an aromatic oil, subsequent distillation of the thermally treated product, recovery of a pitch with extremely low quinoline insoluble contents, hydrogenation of the pitch by continuous thermal treatment in the presence of a hydrogen-donating solvent, distillation and recovery of a hydrogenation pitch, and thermal treatment of the hydrogenated pitch. The mesophase pitch prepared by the process of the present invention is suitable for the production of high performance carbon fibers.

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