Spinnable precursors from petroleum pitch, fibers spun therefrom and method of preparation thereof

摘要

A spinnable precursor from petroleum pitch is obtained by isolating a particular fraction of a molten carbonaceous pitch, which has had at least a portion of the polycondensed aromatic oils normally present in the pitch removed. The deoiled pitch is then subjected to a two-stage extraction in an organic solvent in which it has a reversed solubility curve, followed by thermal treatment. The thus obtained precursor can be directly spun into fiber.