Title: Process for preparing mesophase pitches
Application Number: 87103787 Application Date: 1987.05.25
Publication Number: 1015412 Publication Date: 1987.12.23
Approval Pub. Date: 1992.12.16 Granted Pub. Date: 1992.12.16
International Classifi-cation: C10C3/02;C10C3/06
Applicant(s) Name: Eizo Tajima Address:
Inventor(s) Name: Masatoshi Tsuchitani
Attorney & Agent: WANG JIE ZHANG YUANZHONG
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 hydrogenated 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.
Time: 3