| 초록 |
Impregnation is one of the most important steps to produce high quality synthetic graphite by densifying graphite block or electrode. A typical resource to synthesize impregnating pitch is coal-tar, which has relatively higher impurities, such as sulfur, nitrogen, ash, and etc., than petroleum residue. Due to such impurities, several purification steps are necessary to synthesize impregnating pitch from coal-tar. As a precursor for impregnating pitch synthesis, we have examined pyrolysis fuel oil (PFO), one of the petroleum residues which already well purified through the petroleum refining processes. We also have applied a simple thermal polymerization technique under various conditions to minimize processing cost. As results, we obtained impregnating pitches with softening point (TSP) between 110 and 130℃, and the resulting pitches were characterized by analytical techniques. |
