| 摘要 |
A binder pitch derived from an aromatic petroleum feedstock by batchwise oxidation of the aromatic petroleum feedstock, preferably in the presence of a residue of previously oxidized feedstock wherein the combined feedstock-oxidized feedstock charge is heated to about 600 DEG -700 DEG F., then oxidized with an air flow rate of up to about 0.2 cubic feet per minute oxygen per barrel (c.f.m./bbl.), the exothermic and applied temperature being controlled during oxidation between about 680 DEG -750 DEG F., with concurrent distillation of light ends. The polymerization-oxidation is continued in this temperature range until a binder pitch having a desired softening point with a high Conradson Carbon and a high benzene insoluble content is reached. The product containing a softening point of about 210 DEG -250 DEG F., a benzene insolubles of about 25-35% and a Conradson Carbon in excess of about 48%, is particularly useful as an electrode binder pitch. Binder pitches for use as foundry binder pitch, fiberboard pitch, and pipe saturates, can be made by the present invention. |
