Process for producing optically anisotropic carbonaceous pitch

Details Process for producing optically anisotropic carbonaceous pitch Process for producing optically anisotropic carbonaceous pitch

1982-08-27

1986-07-22

Metz, Andrew H.

Mineral oils: processes and products

Products and compositions

Asphalts, tars, pitches and resins

208 39, 208 44, 4234472, 4234474, 4234476, C01C 300, D01F 912, D01F 920

Patent

active

046018131

ABSTRACT:
In a process for producing an optically anisotropic carbonaceous pitch having a low softening point for the production of carbon material a starting oil to be used is a tar-like substance which is a mixture of compounds not substantially containing chloroform insolubles but containing components having a boiling point of 540.degree. C. or more as principal components and consisting principally of carbon and hydrogen. The tar-like substance has a content of n-heptane insolubles of up to 1 wt % and contains an aromatic oil fraction and a resin fraction as the principal components of n-heptane soluble components. The aromatic carbon fraction, fa, is at least 0.7, the number-average molecular weight is up to 1,000 and the maximum molecular weight is up to 2,000 for each of the aromatic oil and resin fractions.

REFERENCES:
patent: 3976729 (1976-08-01), Lewis et al.
patent: 4026788 (1977-05-01), McHenry
patent: 4032430 (1977-06-01), Lewis
patent: 4209500 (1980-01-01), Chwastiak
patent: 4243512 (1981-01-01), Seo
patent: 4303631 (1981-12-01), Lewis et al.
patent: 4454019 (1984-06-01), Izumi et al.
patent: 4454020 (1985-06-01), Izumi et al.

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