Process for isolating mesophase pitch

Details Process for isolating mesophase pitch Process for isolating mesophase pitch

1988-12-22

1991-07-16

Myers, Helane

Mineral oils: processes and products

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

208 44, 208 45, 208 39, 208 22, C10G 2700, C10C 304

Patent

active

050322508

ABSTRACT:
Isotropic pitch containing mesogens is combined with a solvent and subjected to dense phase or supercritical conditions and the mesogens are phase separated. In one aspect the isotropic pitch containing mesogens is fluxed with a solvent to solubilize the mesogens, the flux mixture is filtered to remove nonsolubles and the mesogens are phase separated by use of the same solvent under dense phase or supercritical conditions of temperature and pressure. The phase separation conditions are such that the mesogens are recovered as mesophase.

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