Process for modifying coal tar materials

Details Process for modifying coal tar materials Process for modifying coal tar materials

1983-11-16

1985-05-14

Gantz, Delbert E.

Mineral oils: processes and products

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

Solvent extraction

208 22, 208 44, C10C 118, C10C 308

Patent

active

045170720

ABSTRACT:
The present invention relates to a process for decreasing and modifying the quinoline-insoluble content (Q.I.) of coal-tar materials; and comprises extracting the coal-tar material with a solvent, where the solvent contains at least one of n-methyl-2-pyrrolidone and the wash oil fraction of coal-tar distillate. Pitches with a diminished Q.I. content, lower viscosity and lower average Q.I. particle size, may be prepared from coal-tar materials which have been so treated.

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patent: 3761387 (1973-09-01), Wegener
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patent: 3992281 (1976-11-01), Benade
patent: 4259171 (1981-03-01), Stadelhofer et al.
patent: 4292170 (1981-09-01), Simone
patent: 4405439 (1983-09-01), Simone

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