Mineral oils: processes and products – Asphalts – tars – pitches and resins; making – treating and... – Chemical modification of asphalt – tar – pitch or resin
Patent
1978-05-05
1980-01-22
Meros, Edward J.
Mineral oils: processes and products
Asphalts, tars, pitches and resins; making, treating and...
Chemical modification of asphalt, tar, pitch or resin
208 22, 208 45, 4234471, 4234474, 423449, C10C 302, C10C 308, D01F 914
Patent
active
041849426
ABSTRACT:
A process for increasing that fraction of an isotropic carbonaceous pitch which is capable of being thermally converted to an optically anisotropic carbonaceous pitch having less than 25 wt. % quinoline insolubles is described. Basically, the pitch is heated at elevated temperatures until spherules visible under polarized light begin to appear. Then heating is terminated and the pitch solvent extracted to provide a solvent insoluble fraction which is capable of being thermally converted to the optically anisotropic pitch.
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Brooks et al., "Chemistry and Physics of Carbon", vol. 4, 1968, pp. 243-268.
Angier Derek J.
Barnum Harry W.
Dvorak Joseph J.
Exxon Research & Engineering Co.
Meros Edward J.
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