| 摘要 |
<p>Isotropic carbonaceous pitches are fluxed with an organic liquid thereby providing a fluid pitch which has substantially all of the quinoline insoluble material suspended in the pitch and which quinoline insoluble material is readily separable from the fluid pitch by filtration, centrifugation and the like. Thereafter the pitch is treated with an anti-solvent so as to precipitate at least a substantial portion of the pitch free of the quinoline insoluble solids.</p> |
