Method for producing mesophase-containing pitch by using carrier

Details Method for producing mesophase-containing pitch by using carrier Method for producing mesophase-containing pitch by using carrier

1983-06-24

1984-12-11

Dees, Carl F.

Mineral oils: processes and products

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

Chemical modification of asphalt, tar, pitch or resin

208 40, 208 39, 208 22, C10C 100

Patent

active

044876858

ABSTRACT:
A method for producing a mesophase-containing pitch from petroleum pitch or coal tar pitch is disclosed. According to this method volatile distillate fractions, which are harmful to mesophase formation and present originally in the raw material pitch or formed as by-product during heat treatment time are driven off by using a carrier gas at a temperature of 360.degree. to 450.degree. C. in order to shorten the overall heat treatment time and advance the mesophase formation smoothly by the increase of stirring effect.

REFERENCES:
patent: 3928170 (1975-12-01), Takahashi
patent: 3974264 (1976-08-01), McHenry
patent: 3976729 (1976-08-01), Lewis et al.
patent: 3995014 (1976-10-01), Lewis
patent: 4005183 (1977-01-01), Singer
patent: 4026788 (1977-05-01), McHenry
patent: 4032430 (1977-06-01), Lewis
patent: 4209500 (1980-06-01), Chwastiak
patent: 4303631 (1981-12-01), Lewis et al.
patent: 4317809 (1982-03-01), Lewis et al.

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