Formation of optically anisotropic pitches

Details Formation of optically anisotropic pitches Formation of optically anisotropic pitches

1982-06-14

1984-08-14

Gantz, Delbert E.

Mineral oils: processes and products

Asphalts, tars, pitches and resins; making, treating and...

Solvent extraction

208 39, 4234474, C10C 120, C10C 118, C10C 308

Patent

active

044655860

ABSTRACT:
An improved process for preparing liquid crystal containing pitches includes extracting carbonaceous isotropic pitches with an organic solvent system which comprises at least one member of the group consisting of dioxane, dimethylacetamide, and tetramethylurea.

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patent: 4277324 (1981-07-01), Greenwood
patent: 4277325 (1981-07-01), Greenwood
patent: 4283269 (1981-08-01), Greenwood

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