Modified coal-tar pitch

Details Modified coal-tar pitch Modified coal-tar pitch

1985-02-04

1986-08-05

Metz, Andrew H.

Mineral oils: processes and products

Products and compositions

Asphalts, tars, pitches and resins

208 39, 208 45, 208 44, C10C 118, C10C 308

Patent

active

046041842

ABSTRACT:
The present invention relates to specialty pitches having low Q.I. content, lower viscosity, lower average Q.I. particle size, lower ash content, higher toluene insoluble and beta-resin content. They may be prepared by extracting the coal-tar material with a solvent, where the solvent contains at least one n-methyl-2-pyrrolidone and the wash oil fraction of coal-tar distillate. The solvent-dissolved fraction of the coal-tar material is then distilled to obtain the specialty pitch material.

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patent: 3843515 (1974-10-01), MacDonald et al.
patent: 3928169 (1975-12-01), Conroy
patent: 4116815 (1978-09-01), Sunago et al.
patent: 4208267 (1980-06-01), Diefendorf et al.
patent: 4292170 (1981-09-01), Simone

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